ATA 29.pdf

MTT M540000 / R3.3 01AUG01
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For Training Purposes Only
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ATA 29
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Hydraulic Power
Hydraulic Power

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THIS PAGE INTENTIONALLY
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HYDRAULIC SYSTEMS -
HYDRAULIC SYSTEMS -
GENERAL
GENERAL

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GLOSSARY OF ABBREVIATIONS
ABBREVIATION DEFINITION
ASA All Speed Aileron
AP Auto Pilot
APU Auxiliary Power Uunit
CRT Cathode Ray Tube
ECAM Electronic Centralized Aircraft
Monitoring
HP High Pressure
LP Low Pressure
PCU Power Control Unit
PTU Power Transfer Unit
RAT Ram Air Turbine
SC Single Chime
THS Trimmable Horizontal Stabilizer
WLDP Warning Light Display Panel
WTB Wing Tip Brake
A300/A310 HYDRAULIC SYSTEM - ABBREVIATIONS AND SYMBOLOGY

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A300/A310 System Line Identification and FIN - General
FIN
FIN
FIN 291063 - The Functional Identification Number (FIN) identifies system components at each component location and
FIN 291063 - The Functional Identification Number (FIN) identifies system components at each component location and
adjacent to component installation area. A FIN label is affixed to the component and installation areas. The FIN is
adjacent to component installation area. A FIN label is affixed to the component and installation areas. The FIN is
broken down in the Hydraulic system:
broken down in the Hydraulic system:
29 =
29 = HYD System
HYD System
1063 =
1063 = Component specific identification number
Component specific identification number

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A300/A310 Hydraulic System - Fluid/Pipes and Component/Accessories
Hydraulic Fluids
General
The hydraulic fluid used on the A300-600 is HYJET IV-A. This
fluid is more temperature tolerant than HYJET IV. When
servicing the hydraulic system of the A300-600 aircraft, HYJET
IV-A should be used whenever possible.
Rigid Pipes
Rigid pipes are identified in conformance with NSA0140 and 0141
by:
- The Part Number (e.g. A2913161502300)
- An NSA0143 label identifying the pipe as an hydraulic pipe
(black dots), its function (e.g. CASE DRAIN) and the direction of
fluid flow (arrow)
- An NSA0144 label identifying the system, comprising a colored
band (Green, Blue, Yellow) plus the figure 1, 2 or 3 indicating the
Green, Blue or Yellow system, respectively.
- Long pipes are identified at both ends.
Flexible Hoses
Flexible hoses are identified in conformance with NSA0140 and 0142
by:
- A purple metal or heat shrinkable sleeve indicating the fluid used
is a phosphate ester to NSA307.110
- The Part Number which appears either on the purple sleeve or
on a separate metal sleeve.
-
Components and Accessories
Hydraulic components and accessories are identified in conformance
with NSA0140 by a 4-figure item number called out on the hydraulic
Functional Diagram. The numbers are on placards; one affixed on
the component or accessory itself, and one on the support on which
the component or accessory is mounted.
In the case of manifold-mounted components, the identification
placards are affixed on each component and on that part of the
manifold receiving the component. (When the component is too
small, the indication is marked directly on the component).
All fittings on components or accessories are identified by an
engraved letter indicated on the hydraulic Functional Diagram.
Components are also identified by two NSA9000 placards:
- a purple placard identifying the hydraulic fluid
- a placard bearing the component designation.

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A300/A310 Hydraulics Systems - Hydraulic Lines Routing (Typical)
Keel
Keel
Beam
Beam
NOTE
NOTE
The stainless steel high pressure lines are electrically
bonded by means of bonding braid and clips. Painted light
alloy low pressure lines are excellent conductors and are
not bonded.

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LEFT BLANK

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A300/A310 Hydraulic System Connections - General

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A300/A310 Hydraulic System Connections/Mounting - Sealing Bobbins
BOBBIN TYPE CONNECTOR
Use on the pressure and return systems of manifolds on which a
maximum number of components are installed by means of sealing
bobbins and mounts (filters, pressure relief valves, priority valves,
pressure switches, electrovalves...) ensures longer life of the pipes and
fittings (which are not handled when components are removed), limits the
risk of leakage and facilitates maintenance.
Refer to illustration for component-to-mounting connection principle by
means of a bobbin.
The bobbins are equipped with one square seal on component side and
one 0-ring on mounting side. An identification groove is provided for fool
proofing. Whenever a component is removed, the bobbin is held in the
component by the square seal. If the component is not immediately
reinstalled, the open port can be easily blanked off by means of a
plug/cap.

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A300/A310 Hydraulic System Connections/Mounting - Sealing Bobbins

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A300/A310 Main Hydraulic Systems - System Fluid Capacities
H y d r a u l i c S y s t e m F l u i d C a p a c i t i e s
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Ñ Q U A N T I T Y Ñ
S Y S T E M / C O M P O N E N T Ñ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Ñ S P E C I F I C A T I O N
Ñ L I T E R S Ñ U S G A L Ñ
- - - - - - - - - - - - - - - - - - - - - - - - - - - Ñ - - - - - - - - - - - Ñ - - - - - - - - - - - - Ñ - - - - - - - - - - - - - - - - - - - - - - -
GREEN SYSTEM Ñ Ñ Ñ
Ñ Ñ Ñ
R e s e r v o i r Ñ Ñ Ñ
T o t a l c a p a c i t y Ñ 4 0 Ñ 1 0 . 5 7 Ñ M a t e r i a l
M a x . c o n t e n t s g a u g i n g Ñ 3 0 Ñ 7 . 9 3 Ñ N o . 0 2 - 0 0 3
N o r m a l f i l l l e v e l Ñ 2 5 Ñ 6 . 6 0 Ñ ( R e f .
L o w l e v e l ( w a r n i n g Ñ 5 ± 0 . 5 Ñ 1 . 3 2 ± 0 . 1 3 Ñ 2 0 - 3 1 - 0 0 )
l e v e l ) Ñ Ñ Ñ
G r e e n s y s t e m Ñ 1 8 0 a p p r o x . Ñ 4 7 . 5 0 Ñ
T o t a l c a p a c i t y Ñ Ñ Ñ
- - - - - - - - - - - - - - - - - - - - - - - - - - - Ñ - - - - - - - - - - - Ñ - - - - - - - - - - - - Ñ
Ñ Ñ Ñ
B L U E S Y S T E M Ñ Ñ Ñ
Ñ Ñ Ñ
T o t a l c a p a c i t y Ñ 2 2 Ñ 5 . 8 1 Ñ
M a x . c o n t e n t s g a u g i n g Ñ 1 7 Ñ 4 . 4 9 Ñ
N o r m a l f i l l l e v e l Ñ 1 2 Ñ 3 . 1 7 Ñ
L o w l e v e l ( w a r n i n g Ñ 5 ± 0 . 5 Ñ 1 . 3 2 ± 0 . 1 3 Ñ
B l u e s y s t e m Ñ 9 0 a p p r o x . Ñ 2 3 . 8 0 Ñ
- - - - - - - - - - - - - - - - - - - - - - - - - - - Ñ - - - - - - - - - - - Ñ - - - - - - - - - - - - Ñ
Ñ Ñ Ñ
YELLOW SYSTEM Ñ Ñ Ñ
Ñ Ñ Ñ
T o t a l c a p a c i t y Ñ 2 8 + 3 Ñ 7 . 4 0 + 0 . 7 9 Ñ
Ñ r e s e r v e Ñ Ñ
M a x . c o n t e n t s g a u g i n g Ñ 2 4 Ñ 6 . 3 4 Ñ
N o r m a l f i l l l e v e l Ñ 1 8 . 5 Ñ 4 . 8 9 Ñ
- - - - - - - - - - - - - - - - - - - - - - - - - - - Ñ - - - - - - - - - - - Ñ - - - - - - - - - - - - Ñ
L o w l e v e l ( w a r n i n g Ñ 5 ± 0 . 5 Ñ 1 . 3 2 ± 0 . 1 3 Ñ
Y e l l o w s y s t e m Ñ 1 3 0 a p p r o x . Ñ 3 4 . 3 4 Ñ
- - - - - - - - - - - - - - - - - - - - - - - - - - - Ñ - - - - - - - - - - - Ñ - - - - - - - - - - - - Ñ - - - - - - - - - - - - - - - - - - - - - - -

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A300/A310 Main Hydraulic Systems Reservoir - Schematic (Typical)
Hydraulic fluid bleed hole to
prevent rupture of reservoir -
bleeds fluid overboard
through depressurization
relief valve - over-serviced
system
NOTE: Various Contents
shown not to scale - for
reference purposes only
Air Space for reservoir air
pressurization from ground
source, Engine 1 and/or APU
bleed air sources

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A300/A310 Green - Blue - Yellow Hydraulic Systems - General
The aircraft has three completely independent hydraulic systems, which
operate simultaneously. They are designated BLUE, GREEN, YELLOW.
Each system is supplied from its own hydraulic reservoir. There are no
provisions for routing of hydraulic fluid from one system to the other.
Four identical engine driven hydraulic pumps, 2 on each engine,
pressurize the systems with a delivery pressure of 3000 PSI:
- GREEN 2 pumps, one on each engine.
- BLUE 1 pump on engine 1.
- YELLOW 1 pump on engine 2.
Two non-reversible power transfer units are installed to provide for power
transfer without fluid exchange, from the GREEN system to the BLUE or
to the YELLOW system. They are required in case of power generation
failure (for example, in case of engine failure or engine pump failure) and
also for ground testing.
If the engine driven pumps are not available, hydraulic power may also
be generated by:
- Two electric pumps in the GREEN system (primarily intended for
ground testing').
- One electric pump in the YELLOW system to pressurize the brake
accumulators (Parking /ALTN-OFF brakes), if required, or to operate
the main cargo compartment doors.
- A ram air turbine (RAT) driven pump in the YELLOW system to
supply emergency hydraulic power.
- A hand pump in the YELLOW system to operate the main cargo
compartment doors when the YELLOW electric pump is not
available.
Hydraulic power is fed directly to the servo controls manifolds and then to
the high pressure manifolds, which are permanently linked. The servo
control manifolds supply the primary flight controls and spoilers through a
servo controls selector valve.
The high pressure manifolds are equipped with a priority valve which
isolates slat, flap and gear operating systems, when the pressure has
dropped below 1885 PSI which gives priority to Flight Controls. (See
chapter FLIGHT CONTROLS for detailed information).
In the event of engine fire the engine driven pumps are isolated from
their hydraulic reservoirs by the FIRE VALVES. When an ENG FIRE
handle is pulled, the respective valves close. In the yellow system, the
FIRE valve closes also in case of LO LVL. The position of the FIRE
VALVES is indicated on the lateral panel.

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A300 Hydraulic Power Users - Green - Blue - Yellow (G-B-Y) Systems
= A300/A310
= A300/A310
Differences
Differences
System Numbers
System Numbers
Main System
Main System 1 - Green
1 - Green
2 - Blue
2 - Blue
3 - Yellow
3 - Yellow

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A300/A310 G-B-Y Hydraulic Systems - General
The aircraft has three completely independent hydraulic systems, which
operate simultaneously. They are designated BLUE, GREEN, YELLOW.
Each system is supplied from its own hydraulic reservoir. There are no
provisions for routing of hydraulic fluid from one system to the other.
Four identical engine driven hydraulic pumps, 2 on each engine,
pressurize the systems with a delivery pressure of 3000 PSI:
- GREEN 2 pumps, one on each engine.
- BLUE 1 pump on engine 1.
- YELLOW 1 pump on engine 2.
Two non-reversible power transfer units are installed to provide for power
transfer without fluid exchange, from the GREEN system to the BLUE or
to the YELLOW system. They are required in case of power generation
failure (for example, in case of engine failure or engine pump failure) and
also for ground testing.
If the engine driven pumps are not available, hydraulic power may also
be generated by:
- Two electric pumps in the GREEN system (primarily intended for
ground testing').
- One electric pump in the YELLOW system to pressurize the brake
accumulators (Parking /ALTN-OFF brakes), if required, or to operate
the main cargo compartment doors.
- A ram air turbine (RAT) driven pump in the YELLOW system to
supply emergency hydraulic power.
- A hand pump in the YELLOW system to operate the main cargo
compartment doors when the YELLOW electric pump is not
available.
Hydraulic power is fed directly to the servo controls manifolds and then to
the high pressure manifolds, which are permanently linked. The servo
control manifolds supply the primary flight controls and spoilers through a
servo controls selector valve.
The high pressure manifolds are equipped with a priority valve which
isolates slat, flap and gear operating systems, when the pressure has
dropped below 1885 PSI which gives priority to Flight Controls. (See
chapter FLIGHT CONTROLS for detailed information).
In the event of engine fire the engine driven pumps are isolated from
their hydraulic reservoirs by the FIRE VALVES. When an ENG FIRE
handle is pulled, the respective valves close. In the yellow system, the
FIRE valve closes also in case of LO LVL. The position of the FIRE
VALVES is indicated on the lateral panel.

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Some A310 Hydraulic Power Users - Green - Blue - Yellow (G-B-Y) Systems
= A300/A310
= A300/A310
Differences
Differences

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A300/A310 Hydraulic Power System - Description and Operation
Each main system includes:
- A reservoir from which fluid is drawn by...
- The four pumps mounted on the engine accessory gearboxes. The
upper pump is always the Green pump. On the left engine, the lower
pump is the Blue pump; on the right engine it is the Yellow pump.
The engine pumps then pressurize:
- A servo controls manifold, then...
- An HP manifold, which directs pressure to the other user systems.
- Valves (check valves, shutoff valves, selector valves, etc ...) govern
the direction or priority of fluid flow.
- Filters, with a maximum filtering capability of 3 to 15-micron, maintain
cleanliness of the fluid between...
- The return manifold and the reservoir.

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A300/A310 Main Hydraulic Power System

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A300/A310 Auxiliary Hydraulic System - General
Auxiliary power is provided by:
- Two electric pumps, mounted in parallel, supplying the Green system
directly,
- A Green/Blue power transfer unit,
- A Green/Yellow power transfer unit,
- An electric pump in the Yellow system,
- A hand pump in the Yellow system,
- A ram air turbine in the Yellow system.

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A300/A310 Auxiliary Hydraulic Power Systems

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A300 Hydraulic Systems - Flight Controls and Other Operating Systems
Flight Control
Operating Systems
Krueger – Green
Slats – Green/Blue
Flaps – Green/Yellow
THS – Green/Yellow
Notch Flap – Green
Spoilers
Green Blue Yellow
6 1-4-7 2-3-5
ASA
Droop – Green
Roll AP – Green/Yellow
Elevator (Pitch)
Pitch AP – Green/Yellow
Yaw
Yaw AP – Green/Yellow
Yaw Damper – Blue/Yellow
Other Operating Systems
Landing Gear – Green
Nose Wheel Steering – Green
Standby Generator – Green
Normal Brakes – Green
Alternate Brakes – Yellow
Parking Brake – Yellow
Cargo Door – Yellow
– Forward
– Aft
– Main Deck
Ram Air Turbine – Yellow
Electric Pump 1/2 – Green
Electric Pump – Yellow
Hand Pump Yellow
LH PTU – Green/Blue
RH PTU – Green/Yellow

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A300 Hydraulic Systems - Flight Control Areas and Servo Controls

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A310 Hydraulic Systems - Flight Controls and Other Operating Systems
Flight Control
Operating Systems
Krueger – Green
Slats – Green/Blue
Flaps – Green/Yellow
THS – Green/Yellow
Spoilers
Green Blue Yellow
5 2-3-7 1-4-6
ASA
Droop – Green
Roll AP – Green/Yellow
Elevator (Pitch)
Pitch AP – Green/Yellow
Yaw
Yaw AP – Green/Yellow
Yaw Damper – Blue/Yellow
Other Operating Systems
Landing Gear – Green
Nose Wheel Steering – Green
Standby Generator – Green
(Some A310s)
Normal Brakes – Green
Alternate Brakes – Yellow
Parking Brake – Yellow
Cargo Door – Yellow
– Forward
– Aft
– Main Deck
Ram Air Turbine – Yellow
Electric Pump 1/2 – Green
Electric Pump – Yellow
Hand Pump Yellow
LH PTU – Green/Blue
RH PTU – Green/Yellow

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A310 Hydraulic Systems - Flight Control Areas and Servo Controls

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A300/Some A310 Hydraulic Systems - Component Location and Line Routing

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A300/Some A310 Main Hydraulic Systems - Components Location and Line Routing
Aft Fuselage and Tail Section

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Some A310 Main Hydraulic Systems - Components Location and Line Routing
*
*
*
*No Standby Generator AC/DC Power
No Standby Generator AC/DC Power

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A310 Main Hydraulic Systems - Components Location and Line Routing

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A300/Some A310 HYD PWR Panel 427VU - Overhead Panel Indications
A300/Some A310s
1 AIR Lights
In normal configuration, the air light is off, and the legend is not
visible. The legend comes on amber when reservoir air pressure is
below 22 PSI. It is accompanied by Master Caution lights on CAPT
and F/O main instrument panels 3VU and 5VU with associated SC
and ECAM activation.*
2 OVHT Lights
In normal configuration, the OVHT light is off, and the legend is not
visible. The legend comes on amber when reservoir fluid
(temperature reaches 95°C ± 5°) it is accompanied by Master
Caution lights on CAPT and F/O main instrument panels 3VU and
5VU with associated SC and ECAM activation.*
3 Reservoir Hydraulic Quantity Indicators
Indicate the fluid level in the respective hydraulic reservoir. If on
indicator is not electrically supplied, the pointer may move to any
position without any warning.
- Green arc: normal usable range of hydraulic fluid.
- Upper small green arc
On ground with reservoir pneumatically pressurized and
hydraulic system depressurized:
Pointer within upper small green arc indicates normal fluid
level in reservoir.
Pointer at max. limit of upper small green arc indicates max.
normal fluid level in reservoir.
Pointer at min. limit of upper small green arc indicates min.
normal fluid level in reservoir.
- Yellow arc with red dot
Pointer within yellow arc indicates abnormal fluid level in
reservoir. When pointer drops to AR below the red dot,
ECAM system master caution lights on CAPT and F/O main
instrument panels 3VU and 5VU and associated SC are
activated.*
*Other A310s
On A310s which have the Warning Light Display Panel (WLDP) in place
of the Master Caution lights, out of limits conditions are accompanied by
the HYD light on the WLDP with associated SC and ECAM activation.
1
1
2
2
3
3
Some A310s
Small Arc

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A300/Some A310 HYD PWR Panel 427VU - Overhead Panel Indications
6
6
5
5
4
4
A300/Some A310s
4 ELEC PUMPS Pushbutton Switch
In normal configuration, the pushbutton switch legends are off and
the electric pumps are de-energized.
When the switch is pressed:
- In normal configuration, the electric pumps are activated, the on
legend in the lower half of the switch comes on white.
- If both electric pumps are failed, the LO PR legend in the upper
half of the switch comes on amber. It is accompanied by Master
Caution lights on CAPT and F/O main instrument panels 3VU
and 5VU with associated SC and ECAM activation.*
- In the event of 28VDC power supply loss, ELEC PUMPS
pushbutton switch returns to the released position.
5 PUMPS/ENG 1, B and G, ENG 2, G and Y Pushbutton Switches
In normal configuration, in flight, the switch is pressed (in), and the
legends are off.
If pump delivery pressure drops below 1870 PSI, the LO PR legend
in the upper half of the switch comes on amber. It is accompanied by
Master Caution lights on CAPT and F/O main instrument panels
3VU and 5VU with associated SC and ECAM activation. If the switch
is released (out), the pump is de-energized and the OFF legend in
the lower half of the switch comes on white. It is accompanied by
master caution lights on CAPT and F/O main instrument panels 3VU
and 5VU with associated SC and ECAM activation.*
6 PTU Pushbutton Switches
Each power transfer unit (PTU), green/yellow and green/blue, is
controlled by a pushbutton switch.
When the switch is pressed (in), the PTU is activated, and the ON
legend in the lower half of the switch comes on green.
When the switch is released (out), the PTU is deactivated and the
ON legend goes off.
*Other A310s
On A310s which have the Warning Light Display Panel (WLDP) in place
of the Master Caution lights, out of limits conditions are accompanied by
the HYD light on the WLDP with associated SC and ECAM activation.

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A300/A310 Hydraulic System - Controls and Indications

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LEFT BLANK

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A300/A310 Maintenance Panel - HYD PWR Panel 472VU
HYD PWR PANEL
1. ELEC PUMPS TEST SWITCH
The switch controls the individual test of the electric pumps in the
GREEN system. The switch is springloaded to neutral. For test, the
elec pumps pushbutton switch on the HYD PWR section of the
overhead panel must be selected ON, the ON legend ON; LO PR
legend OFF.
- PUMP 1 (upper) position
PUMP 2 is deactivated
- PUMP 1 only is operating PUMP 2 (lower) position
PUMP 1 is deactivated
PUMP 2 only is operating
- NEUTRAL (center) position
Both pumps operate.
The test of each pump is successful if the LO PR legend in the elec
pumps pushbutton switch does not come on.
2. FIRE VALVES ENG 1, BLUE AND GREEN/ENG 2, GREEN AND
YELLOW ANNUNCIATORS
When the ANN LT switch on the rear panel is placed in read, the fire
valves legends indicate the position of the respective fire valve which
is controlled by the corresponding ENG FIRE handle.
- Open legend comes on White, indicating the valve is fully open
- Shut legend comes on White, indicating the valve is fully closed.
3. RSVR OVHT TEST BLUE, GREEN, YELLOW PUSHBUTTON
SWITCHES
• Pressed
An overheat signal is simulated in the corresponding overheat
detection circuit. If test is successful, the respective OVHT light
on the HYD PWR section of the overhead panel will come on
accompanied by Master Caution Lights on Capt and F/0 Main
Instrument Panels 3VU and 5VU with associated SC and ECAM
activation.
• Released
The overheat signal and the warnings are cancelled.
NOTE: These pushbutton switches are also used for THS actuator
jamming test.
4. The Hydraulic Circuit Breakers (CBs) are located on:
A300 - 133 VU Distribution Panel located on the rear wall of the
flight deck – Main CB Panel. CBs located on LH side of
133VU – Hydraulic Section of Panel
A310 - 128 VU Distribution Panel located on rear wall of flight deck
– Main CB Panel. CBs located on LH side of 128 VU –
Hydraulic Section of panel.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-35
35
A300/A310 Hydraulic Power - Flight Compartment Controls and Indications
CB Panels
CB Panels - A300/133VU Shown
- A300/133VU Shown
- A310/128VU (Typical)
- A310/128VU (Typical)
4

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-36
36
A300 Hydraulic Systems Schematic - General

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-37
37
A310 Hydraulic Systems Schematic - General

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-38
38
A300 Hydraulic System Electrical Power Supply - General

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-39
39
A310 Hydraulic System Electrical Power Supply - General

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-40
40
GREEN
MAIN HYDRAULIC
SYSTEM NUMBER 1

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-41
41
A300/Some A310 - Green Main Hydraulic Power System - Description
GENERAL
This system is the most important of the three.
- It includes one pump on each of the two engines.
- It actuates directly the majority of the user services except:
- Twelve of the fourteen spoilers.
- The yaw damper.
- The cargo compartment doors.
- It can operate independently on the ground by means of the APU and
the electric pumps.
- It is used to pressurize the other systems by means of the power
transfer units.
- In addition, the Green system ground service panel features controls
and indicators for the reservoir filling system.
USERS
A. Supplied through the servo controls manifold, with independent
supply capability on the ground
- of the L wing
- of the R wing
- of the aft fuselage
- Two all speed aileron servo controls L and R
- Two elevator servo controls L and R
- One rudder servo control
- Two actuators on spoilers 6, L and R (A300)
- Two actuators on Spoilers 5, L and R
- One trimmable horizontal stabilizer actuator motor
- One autopilot roll actuator servo motor
- One autopilot pitch actuator servo motor
- One autopilot yaw actuator servo motor
- One pitch artificial feel actuator.
B. Supplied through the HP manifold
- Two hydraulic motors of the Green/Blue and Green/Yellow power
transfer units.
- The normal braking system for the eight main landing gear
wheels.
And through a priority valve:
- Two hydraulic motors in the flap and slat power control units.
- Two Krueger flap actuators.
- Two notch flap actuators (A300 only).
- Two all speed aileron droop signal actuators.
- Landing gear extension/ retraction and nose wheel steering
systems:
- three landing gear actuating cylinders
- three downlock systems
- four landing gear door actuating cylinders
- seven landing gear and landing gear door uplocks with
uplock release actuators
- two nose wheel steering actuating cylinders powered in
parallel with the landing gear extension system.
- Standby generator (A300, some A310s).
NOTE: A300 Notch (Slot) Flaps operate at same time with LH/RH
Krueger operation during extension and retraction of the Krueger or
Krueger Flaps.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-42
42
A300 Green Hydraulic Power System - Schematic

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-43
43
A300/Some A310 - Green Main Hydraulic Power System - Description
GENERAL
This system is the most important of the three.
- It includes one pump on each of the two engines.
- It actuates directly the majority of the user services except:
- Twelve of the fourteen spoilers.
- The yaw damper.
- The cargo compartment doors.
- It can operate independently on the ground by means of the APU and
the electric pumps.
- It is used to pressurize the other systems by means of the power
transfer units.
- In addition, the Green system ground service panel features controls
and indicators for the reservoir filling system.
USERS
A. Supplied through the servo controls manifold, with independent
supply capability on the ground
- of the L wing
- of the R wing
- of the aft fuselage
- Two all speed aileron servo controls L and R
- Two elevator servo controls L and R
- Two actuators on spoilers 6, L and R (A300)
- Two actuators on Spoilers 5, L and R
- One trimmable horizontal stabilizer actuator motor
- One autopilot roll actuator servo motor
- One autopilot pitch actuator servo motor
- One autopilot yaw actuator servo motor
- One pitch artificial feel actuator.
B. Supplied through the HP manifold
- Two hydraulic motors of the Green/Blue and Green/Yellow power
transfer units.
- The normal braking system for the eight main landing gear
wheels.
And through a priority valve:
- Two hydraulic motors in the flap and slat power control units.
- Two Krueger flap actuators.
- Two notch flap actuators (A300 only).
- Two all speed aileron droop signal actuators.
- Landing gear extension/ retraction and nose wheel steering
systems:
- three landing gear actuating cylinders
- three downlock systems
- four landing gear door actuating cylinders
- seven landing gear and landing gear door uplocks with
uplock release actuators
- two nose wheel steering actuating cylinders powered in
parallel with the landing gear extension system.
- Standby generator (A300, some A310s).
NOTE: A300 Notch (Slot) Flaps operate at same time with LH/RH
Krueger operation during extension and retraction of the Krueger or
Krueger Flaps.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-44
44
A310 Green Hydraulic Power System - Schematic
*
*Some A310s
Some A310s
*
*

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-45
45
A300 Green Main Hydraulic Power - Component Locations and FIN
F I N F U N C T I O N A L D E S I G N A T I O N PANEL ZONE ACCESS
DOOR
ATA REF.
2 9 1 0 0 0 R E S E R V O I R - H Y D R A U L I C , G R E E N 1 4 7 7 3 4 2 9 - 1 1 - 1 1
2 9 1 0 0 2 FILTER RSVR RETURN, GREEN 1 4 8 7 3 4 2 9 - 1 1 - 1 5
2 9 1 0 0 4 MANI F O L D - L P , G R E E N 1 4 7 7 3 4
2 9 1 0 0 5 V A L V E - D E P R E S S / R E L I E F , G R S V R 1 4 7
2 9 1 0 0 6 GROUND CONNECTOR-SUCTION, G 1 4 7 1 4 7 B L
2 9 1 0 0 7 G R O U N D C O N N E C T O R - F I L L I N G , G 1 4 7 1 4 7 B L
2 9 1 0 0 8 G R O U N D C O N N E C T O R - D E L I V E R Y , G 1 4 7 1 4 7 B L
2 9 1 0 1 0 MANI F O L D - S E R V O C O N T R O L S , G 1 4 7 7 3 4 2 9 - 1 1 - 3 4
2 9 1 0 3 0 PUMP-ENG1 4 3 5 4 3 5 A L 2 9 - 1 1 - 3 2
2 9 1 0 3 1 PUMP-ENG2 4 4 5 4 4 5 A L 2 9 - 1 1 - 3 2
1 1 1 G K V A L V E - G R E E N P U M P F I R E , E N G 1 5 7 5 5 7 5 F B 2 9 - 1 1 - 3 3
2 9 1 0 4 0 VALVE-NON RETURN 4 1 0
2 9 1 0 4 8 F I L T E R - G P U M P D E L I V E R Y , E N G 1 1 4 7 7 3 4 2 9 - 1 1 - 4 2
2 9 1 0 6 0 MANI F O L D - H P , G R E E N 1 4 7 7 3 4 2 9 - 1 1 - 1 2
2 9 1 0 6 3 R E L I E F V A L V E - G R E E N P U M P S D E L I V E R Y 1 4 7 7 3 4 2 9 - 1 1 - 5 5
2 9 1 0 7 0 ACCU-GREEN PWR 1 4 7 7 3 4 2 9 - 1 1 - 5 6
2 9 1 0 7 2 PRESS GAGE-GREEN ACCU 1 4 7 7 3 4
30WW PRESS SWI T C H - H P M A N I F O L D , G 1 4 7 7 3 4
FILTER MODULE ASSY 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 6
ENG PUMP CASE DRAIN 4 6 2 4 6 2 A R 2 9 - 1 1 - 3 6
F I L T E R S - E N G P U M P C A S E 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 6
DRAI N 4 6 2 4 5 2 A R 2 9 - 1 1 - 3 6
1 1 2 G K PRESS SWI T C H - G P U M P , E N G 2 4 8 3 4 8 3 A L 2 9 - 1 1 - 6 2
2 9 1 7 0 0 MANI F O L D - E N G I N E P Y L O N 4 7 3 4 7 3 A L
2 9 1 7 0 2 RESTRICTOR-GREEN PUMP
RECI RCULATION,ENG1
4 7 3 4 7 3 A L
2 9 1 7 0 3 R E S T R I C T O R - G R E E N P U M P R E C I R C U L A T I O N , E N G 2 4 8 3 4 8 3 A L
2 9 1 0 1 5 C H E C K V A L V E - L / G R E T U R N , G 1 4 7 7 3 4
2 9 1 0 1 9 C H E C K V A L V E - P T U R E T U R N , G 1 4 7 7 3 4
2 9 1 0 2 0 C H E C K V A L V E - C A S E D R A I N R E T U R N , G 1 4 7 7 3 4
2 9 1 0 2 1 CHECK VALVE-FLAPS AND SLATS RETURN, G 1 4 7 7 3 4
2 9 1 0 2 2 C H E C K V A L V E - R E T U R N , G H P M A N I F O L D 1 4 7 7 3 4
2 9 1 0 2 4 C H E C K V A L V E - B R K R E T U R N , G 1 4 7 7 3 4
2 9 1 0 2 6 C H E C K V A L V E - R E T U R N , G / B P T U 1 4 7 7 3 4
2 9 1 0 5 0 C H E C K V A L V E - G P U M P D E L I V E R Y , E N G 1 1 4 7 7 3 4
2 9 1 0 8 0 C H E C K V A L V E - G E L E C P U M P D E L I V E R Y 1 4 7 7 3 4
2 9 1 1 3 1 C H E C K V A L V E - G R S V R F I L L I N G 1 4 7 7 3 4

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-46
46
D
D
D
D
E
E
F
F
D
E
E
F
F

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-47
47
DOOR
ATA REF.
2 9 1 0 0 2 FILTER RSVR RETURN, GREEN 1 4 8 7 3 4 2 9 - 1 1 - 1 5
2 9 1 0 0 5 V A L V E - D E P R E S S / R E L I E F , G R S V R 1 4 7
2 9 1 0 0 6 GROUND CONNECTOR-SUCTION, G 1 4 7 1 4 7 B L
2 9 1 0 0 7 G R O U N D C O N N E C T O R - F I L L I N G , G 1 4 7 1 4 7 B L
2 9 1 0 0 8 G R O U N D C O N N E C T O R - D E L I V E R Y , G 1 4 7 1 4 7 B L
2 9 1 0 3 0 PUMP-ENG1 4 3 5 4 3 5 A L 2 9 - 1 1 - 3 2
2 9 1 0 3 1 PUMP-ENG2 4 4 5 4 4 5 A L 2 9 - 1 1 - 3 2
2 9 1 0 7 0 ACCU-GREEN PWR 1 4 7 7 3 4 2 9 - 1 1 - 5 6
FILTER MODULE ASSY 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 6
ENG PUMP CASE DRAIN 4 6 2 4 6 2 A R 2 9 - 1 1 - 3 6
F I L T E R S - E N G P U M P C A S E 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 6
DRAI N 4 6 2 4 5 2 A R 2 9 - 1 1 - 3 6
2 9 1 7 0 2 RESTRICTOR-GREEN PUMP
RECI RCULATION,ENG1
4 7 3 4 7 3 A L
2 9 1 7 0 3 R E S T R I C T O R - G R E E N P U M P R E C I R C U L A T I O N , E N G 2 4 8 3 4 8 3 A L
2 9 1 0 1 9 C H E C K V A L V E - P T U R E T U R N , G 1 4 7 7 3 4
2 9 1 0 2 0 C H E C K V A L V E - C A S E D R A I N R E T U R N , G 1 4 7 7 3 4
2 9 1 0 2 1 CHECK VALVE-FLAPS AND SLATS RETURN, G 1 4 7 7 3 4
2 9 1 0 2 2 C H E C K V A L V E - R E T U R N , G H P M A N I F O L D 1 4 7 7 3 4
2 9 1 0 2 4 C H E C K V A L V E - B R K R E T U R N , G 1 4 7 7 3 4
2 9 1 0 2 6 C H E C K V A L V E - R E T U R N , G / B P T U 1 4 7 7 3 4
2 9 1 0 8 0 C H E C K V A L V E - G E L E C P U M P D E L I V E R Y 1 4 7 7 3 4
2 9 1 1 3 1 C H E C K V A L V E - G R S V R F I L L I N G 1 4 7 7 3 4

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-48
48
O
O
P
P
O
O
P
P

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-49
49
DOOR
A T A R E F .
2 9 1 0 0 2 F I L T E R - R S V R R E T U R N , G R E E N 1 4 7 7 3 4 2 9 - 1 1 - 1 5
2 9 1 0 0 5 V A L V E - D E P R E S S R E L I E F , G R S V R 1 4 7 1 4 7 A L
2 9 1 0 0 6 GROUND CONNECTOR-SUCTI ON, G 1 4 7 1 4 7 A L
2 9 1 0 0 7 GROUND CONNECTOR-FI L L I N G , G 1 4 7 1 4 7 A L
2 9 1 0 0 8 GROUND CONNECTOR-DELI V E R Y , G 1 4 7 1 4 7 A L
2 9 1 0 3 0 PUMP-GREEN, E N G 1 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 2
2 9 1 0 3 1 PUMP-GREEN, E N G 2 4 6 2 4 6 2 A R 2 9 - 1 1 - 3 2
1 1 1 G K V A L V E - E N G I N E P U M P F I R E , E N G 1 5 7 5 5 7 5 A L 2 9 - 1 1 - 3 3
2 9 1 7 0 2 RESTRICTOR-GREEN PUMP RECIRCULATION, ENG1 4 7 3 4 7 3 A L
2 9 1 0 7 0 ACCU-GREEN PWR 1 4 7 7 3 4 2 9 - 1 1 - 5 6
F I L T E R S - E N G I N E P U M P C A S E 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 6
DRAI N 4 6 2 4 6 2 A R 2 9 - 1 1 - 3 6

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-50
50

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-51
51
A310 Green Main Hydraulic Power - Component Locations FIN
DOOR
A T A R E F .
2 9 1 0 0 2 F I L T E R - R S V R R E T U R N , G R E E N 1 4 7 7 3 4 2 9 - 1 1 - 1 5
2 9 1 0 0 5 V A L V E - D E P R E S S R E L I E F , G R S V R 1 4 7 1 4 7 A L
2 9 1 0 0 6 GROUND CONNECTOR-SUCTI ON, G 1 4 7 1 4 7 A L
2 9 1 0 0 7 GROUND CONNECTOR-FI L L I N G , G 1 4 7 1 4 7 A L
2 9 1 0 0 8 GROUND CONNECTOR-DELI V E R Y , G 1 4 7 1 4 7 A L
2 9 1 0 3 0 PUMP-GREEN, E N G 1 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 2
2 9 1 0 3 1 PUMP-GREEN, E N G 2 4 6 2 4 6 2 A R 2 9 - 1 1 - 3 2
2 9 1 0 7 0 ACCU-GREEN PWR 1 4 7 7 3 4 2 9 - 1 1 - 5 6
F I L T E R S - E N G I N E P U M P C A S E 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 6
DRAI N 4 6 2 4 6 2 A R 2 9 - 1 1 - 3 6

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-52
52

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-53
53
A300 G-B-Y Hydraulic Systems - Reservoirs and Capacities - General Features
P u r p o s e
. E a c h h y d r a u l i c s y s t e m i n c l u d e s a r e s e r v o i r w h i c h c o m p e n s a t e s f o r v a r i a -
t i o n s i n f l u i d v o l u m e d u e t o u s e r s e r v i c e o p e r a t i o n , a n d p r o v i d e s a
r e s e r v e s u p p l y o f f l u i d .
T h e v o l u m e o f f l u i d i n e a c h s y s t e m , i n c l u d i n g t h e f l u i d i n t h e r e s e r v o i r ,
i s a p p r o x i m a t e l y 1 8 0 l ( 4 7 . 5 U S G a l ) f o r t h e G r e e n s y s t e m , 9 0 l
( 2 3 . 7 U S G a l ) f o r t h e B l u e s y s t e m a n d 1 3 0 l ( 3 4 . 3 U S G a l ) f o r t h e Y e l l o w
s y s t e m .
. T h e t h r e e r e s e r v o i r s a r e a i r - p r e s s u r i z e d t o 3 . 5 b a r s ( 5 0 . 8 p s i )
r e l a t i v e .
. E a c h r e s e r v o i r i s d e s i g n e d t o r e m a i n p r e s s u r i z e d f o r a t l e a s t 1 2 h o u r s .
D e s c r i p t i o n
. T h e r e s e r v o i r s a r e a t t a c h e d t o t h e a i r c r a f t s t r u c t u r e b y t w o c l a m p -
s e c u r e d s t r a p s . T h e y e a c h c o n s i s t o f a s h e e t s t e e l c y l i n d e r w i t h a
mol d e d l i g h t a l l o y b a s e . C y l i n d e r d i a m e t e r i s t h e s a m e f o r e a c h r e s e r -
v o i r . T h e i r r e l a t i v e c a p a c i t i e s a r e t h e r e f o r e d e t e r m i n e d b y t h e i r
h e i g h t .
G r e e n B l u e Y e l l o w
T o t a l 4 0 l ( 1 0 . 6 U S g a l ) 2 2 l ( 5 . 8 1 U S g a l ) 2 8 l ( 7 . 4 0 U S g a l )
+ 3 l ( 0 . 7 9 U S g a l )
( r e s e r v e )
M a x g a g e a b l e 3 0 l ( 7 . 9 3 U S g a l ) 1 7 l ( 4 . 4 9 U S g a l ) 2 4 l ( 6 . 3 4 U S g a l )
Fi l l l e v e l 2 5 l ( 6 . 6 0 U S g a l ) 1 2 l ( 3 . 1 7 U S g a l ) 1 8 . 5 l ( 4 . 8 9 U S g a l )
L o w l e v e l 5 l ± 0 . 5 5 l ± 0 . 5 5 l ± 0 . 5
( 1 . 3 2 U S g a l ± 0 . 1 3 ) ( 1 . 3 2 U S g a l ± 0 . 1 3 ) ( 1 . 3 2 U S g a l ± 0 . 1 3 )
w a r n i n g
T h e l e v e l o f t h e t h r e e r e s e r v o i r s m a y b e a d j u s t e d s e p a r a t e l y a t t h e G r e e n
s y s t e m g r o u n d s e r v i c e p a n e l .
T h e Y e l l o w r e s e r v o i r i n c l u d e s a r e s e r v e f o r R A T s u p p l y ( R e f . 2 9 - 1 3 )
- A i r - f l u i d c o n t a c t i s d i r e c t .
- A c o m p a r t m e n t f e a t u r e e n s u r e s p o s i t i v e f l u i d s u p p l y t o t h e p u m p s d u r i n g
n e g a t i v e " g " c o n d i t i o n s o f u p t o 2 0 s e c o n d s .
- A n i n t e r n a l d e v i c e l i m i t s e m u l s i o n i n t h e e v e n t o f s u b s t a n t i a l r e t u r n
f l o w .
A c c e s s o r y C o m p o n e n t s
. T h e t o p o f e a c h r e s e r v o i r i s e q u i p p e d w i t h a p r e s s u r i z a t i o n m a n i f o l d ,
i n c l u d i n g :
. A c h e c k v a l v e o n t h e a i r s u p p l y l i n e .
. A d i r e c t r e a d i n g a i r p r e s s u r e g a g e
. A n a i r p r e s s u r e s w i t c h w h i c h s i g n a l s l o w p r e s s u r e c o n d i t i o n s t o t h e
f l i g h t c o m p a r t m e n t .
Mi d w a y d o w n t h e r e s e r v o i r i s m o u n t e d a q u a n t i t y t r a n s m i t t e r c o m p r i s i n g :
. A f l o a t , w i t h a c t u a t i n g l i n k a g e a n d s n u b b e r .
. A d i r e c t r e a d i n g q u a n t i t y g a g e ( A c c u r a c y ± 2 ° a n g u l a r )
. A n e l e c t r i c a l c o n n e c t o r f o r t r a n s m i t t i n g q u a n t i t y s i g n a l s a n d l o w l e v e l
w a r n i n g s t o t h e f l i g h t c o m p a r t m e n t a n d t o t h e G r e e n s y s t e m g r o u n d s e r v i c e
p a n e l .
T h e b o t t o m o f t h e r e s e r v o i r i n c l u d e s :
. A s u c t i o n p o r t f o r s u p p l y o f f l u i d t o t h e p u m p s ( + o n e f o r t h e r a m a i r
t u r b i n e o n t h e Y e l l o w s y s t e m r e s e r v o i r ) .
. A r e t u r n p o r t w i t h a n o v e r h e a t s e n s o r .
. A p o r t c o n n e c t e d t o a s e l f - s e a l i n g d e p r e s s u r i z a t i o n / r e l i e f v a l v e
i n t h e g r o u n d s e r v i c e p a n e l . ( R e f . F i g . 0 0 9 )
. A d r a i n v a l v e .
C o m p o n e n t O p e r a t i n g S e t t i n g s
- A i r p r e s s u r e s w i t c h :
1 . 5 ± 0 . 1 b a r s ( 2 1 . 7 5 ± 1 . 4 5 p s i ) - p r e s s u r e d e c r e a s i n g
1 . 7 b a r s ( 2 4 . 6 5 p s i ) m a x i m u m - p r e s s u r e i n c r e a s i n g .
- D e p r e s s u r i z a t i o n / r e l i e f v a l v e
( 4 . 2 + 0 . 3 - 0 . 2 b a r s ) ( 6 0 . 9 + 4 . 3 5 - 2 . 9 0 p s i ) - p r e s s u r e
i n c r e a s i n g ( o p e n i n g )
3 . 7 ± 0 . 1 b a r s ( 5 3 . 6 6 ± 1 . 4 5 p s i ) - p r e s s u r e d e c r e a s i n g ( c l o s i n g ) .
- I n t h e e v e n t o f p r e s s u r i z a t i o n l o s s , p r e s s u r e i n t h e r e s e r v o i r w i l l n o t
b e l o w e r t h a n 3 b a r s ( r e l a t i v e p r e s s u r e ) a f t e r 3 h o u r o p e r a t i o n .

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-54
54
A300/A310 G-B-Y Hydraulic System Reservoirs - General and Location
Blue Reservoir
Blue Reservoir
Shown
Shown
Yellow Reservoir
Yellow Reservoir
Shown
Shown

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-55
55
A310 Hydraulic System - Reservoir and Capacities - General Features
P u r p o s e
. E a c h h y d r a u l i c s y s t e m i n c l u d e s a r e s e r v o i r w h i c h c o m p e n s a t e s f o r v a r i a -
t i o n s i n f l u i d v o l u m e d u e t o u s e r s e r v i c e o p e r a t i o n , a n d p r o v i d e s a
r e s e r v e s u p p l y o f f l u i d .
R e s e r v o i r v o l u m e i n c l u d e d ; t h e v o l u m e o f f l u i d i n e a c h s y s t e m i s a p p r o x i -
m a t e l y 1 7 0 l ( 4 4 . 8 U S G a l ) f o r G r e e n s y s t e m , 8 5 l ( 2 1 . 1 4 U S G a l ) f o r B l u e
s y s t e m a n d 1 2 0 l ( 3 1 . 6 U s G a l ) f o r Y e l l o w s y s t e m .
. T h e t h r e e r e s e r v o i r s a r e a i r - p r e s s u r i z e d t o 3 . 5 b a r s ( 5 0 . 8 p s i ) .
. E a c h r e s e r v o i r i s d e s i g n e d t o r e m a i n s p r e s s u r i z e d f o r a t l e a s t 1 2 h o u r s .
. T h e r e s e r v o i r s a r e a t t a c h e d t o t h e a i r c r a f t s t r u c t u r e b y t w o c l a m p -
s e c u r e d s t r a p s . T h e y e a c h c o n s i s t o f a s h e e t s t e e l c y l i n d e r w i t h a
mol d e d l i g h t a l l o y b a s e . C y l i n d e r d i a m e t e r i s t h e s a m e f o r e a c h r e s e r -
v o i r . T h e i r r e l a t i v e c a p a c i t i e s a r e t h e r e f o r e d e t e r m i n e d b y t h e i r h e i g h t .
G r e e n B l u e Y e l l o w
T o t a l 4 0 l ( 1 0 . 5 7 U S g a l ) 2 2 l ( 5 . 8 1 U S g a l ) 2 8 l ( 7 . 4 U S g a l )
± 3 l ( 0 . 7 9 U S g a l )
( r e s e r v e )
M a x g a g e a b l e 3 0 l ( 7 . 9 3 U S g a l ) 1 7 l ( 4 . 4 9 U S g a l ) 2 4 l ( 6 . 3 4 U S g a l )
Fi l l l e v e l 1 7 l ( 4 . 4 9 U S g a l ) 1 2 l ( 3 . 1 7 U S g a l ) 1 8 . 5 l ( 4 . 8 9 ( U S g a l )
L o w l e v e l 5 l ± 0 . 5 ( 1 . 3 2 U S g a l ± . 1 3 ) 5 l ± 0 . 5 ( 1 . 3 2 U S g a l ± . 1 3 )
w a r n i n g
T h e l e v e l o f t h e t h r e e r e s e r v o i r s m a y b e a d j u s t e d s e p a r a t e l y a t t h e G r e e n
s y s t e m g r o u n d s e r v i c e p a n e l .
T h e y e l l o w r e s e r v o i r i n c l u d e s a r e s e r v e f o r R A T s u p p l y
- A i r - f l u i d c o n t a c t i s d i r e c t .
- A c o m p a r t m e n t f e a t u r e e n s u r e s p o s i t i v e f l u i d s u p p l y t o t h e p u m p s d u r i n g
n e g a t i v e " g " c o n d i t i o n s o f u p t o 2 0 s e c o n d s .
- A n i n t e r n a l d e v i c e l i m i t s e m u l s i o n i n t h e e v e n t o f s u b s t a n t i a l r e t u r n
f l o w .
A c c e s s o r y C o m p o n e n t s
. T h e t o p o f e a c h r e s e r v o i r i s e q u i p p e d w i t h a p r e s s u r i z a t i o n m a n i f o l d ,
i n c l u d i n g :
. A c h e c k v a l v e o n t h e a i r s u p p l y l i n e .
. A d i r e c t r e a d i n g a i r p r e s s u r e g a g e ( A c c u r a c y ± 2 ° o f a n g l e )
. A n a i r p r e s s u r e s w i t c h w h i c h s i g n a l s l o w p r e s s u r e c o n d i t i o n s t o t h e
f l i g h t c o m p a r t m e n t .
. A b l a n k i n g c a p .
Mi d w a y d o w n t h e r e s e r v o i r i s m o u n t e d a q u a n t i t y t r a n s m i t t e r c o m p r i s i n g :
. A f l o a t , w i t h a c t u a t i n g l i n k a g e a n d s n u b b e r .
. A d i r e c t r e a d i n g q u a n t i t y g a g e .
. A n e l e c t r i c a l c o n n e c t o r f o r t r a n s m i t t i n g q u a n t i t y s i g n a l s a n d l o w l e v e l
w a r n i n g s t o t h e f l i g h t c o m p a r t m e n t a n d t o t h e G r e e n s y s t e m g r o u n d s e r v i c e
p a n e l .
T h e b o t t o m o f t h e r e s e r v o i r i n c l u d e s :
. A s u c t i o n p o r t f o r s u p p l y o f f l u i d t o t h e p u m p s ( ± o n e f o r t h e r a m a i r
t u r b i n e o n t h e Y e l l o w s y s t e m r e s e r v o i r ) .
. A r e t u r n p o r t w i t h a n o v e r h e a t s e n s o r .
. A p o r t c o n n e c t e d t o a s e l f - s e a l i n g d e p r e s s u r i z a t i o n / r e l i e f v a l v e
i n t h e g r o u n d s e r v i c e p a n e l . ( R e f . F i g . 0 1 1 )
. A d r a i n v a l v e .
C o m p o n e n t O p e r a t i n g S e t t i n g s
- A i r p r e s s u r e s w i t c h :
1 . 5 ± 0 . 1 b a r s ( 2 1 . 7 5 ± 1 . 4 5 p s i ) - p r e s s u r e d e c r e a s i n g
1 . 7 b a r s ( 2 4 . 6 5 p s i ) m a x i m u m - p r e s s u r e i n c r e a s i n g .
- D e p r e s s u r i z a t i o n / r e l i e f v a l v e
( 4 . 2 ± 0 . 3 - 0 . 2 b a r s ) ( 6 0 . 9 ± 4 . 3 5 - 2 . 9 0 p s i ) - p r e s s u r e
i n c r e a s i n g ( o p e n i n g )
3 . 7 ± 0 . 1 b a r s ( 5 3 . 6 6 ± 1 . 4 5 p s i ) - p r e s s u r e d e c r e a s i n g ( c l o s i n g ) .
- I n t h e e v e n t o f p r e s s u r i z a t i o n l o s s , p r e s s u r e i n r e s e r v o i r w i l l n o t b e
l o w e r t h a n 3 b a r s ( r e l a t i v e p r e s s u r e ) a f t e r 3 h o u r s o p e r a t i o n .

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-56
56
A300/A310 G-B-Y Hydraulic System Reservoirs - General and Locations
Blue Reservoir
Blue Reservoir
Shown
Shown
Yellow Reservoir
Yellow Reservoir
Shown
Shown

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-57
57
A300/Some A310 Hydraulic Reservoir Pressurization System - PW JT9D-7R4 Engine
P u r p o s e
- T o e n s u r e i n e a c h h y d r a u l i c r e s e r v o i r a n a i r p r e s s u r e o f 3 t o 3 . 5 b a r s
( 4 3 . 5 t o 5 0 . 7 p s i ) r e l a t i v e s o a s t o p r e v e n t c a v i t a t i o n o f p u m p s o n t h e
g r o u n d a n d t h r o u g h o u t t h e w h o l e f l i g h t e n v e l o p e .
- T o m a i n t a i n t h e r e s e r v o i r s u f f i c i e n t l y a i r - t i g h t i n t h e e v e n t o f f a i l u r e
o f t h e p r e s s u r i z a t i o n s y s t e m o r a f t e r e n g i n e s h u t - d o w n .
- T h e s a m e s y s t e m p r e s s u r i z e s t h e t h r e e h y d r a u l i c r e s e r v o i r s b y m e a n s o f
a i r b l e d f r o m t h e 1 4 t h s t a g e ( G E e n g i n e s ) o f t h e L e n g i n e H P c o m p r e s s o r
o r f r o m t h e a i r b l e e d s y s t e m , o r , w h e n t h e e n g i n e s a r e s h u t d o w n , f r o m t h e
d o w n , f r o m t h e c o n n e c t o r o n t h e B l u e s y s t e m g r o u n d s e r v i c e p a n e l .
Bl e e d i n g a i r f r o m t h e a i r b l e e d s y s t e m o f f e r s t h e a d v a n t a g e o f o b t a i n i n g
a i r f r o m t h e A P U e i t h e r o n t h e g r o u n d o r d u r i n g f l i g h t .
- A d e p r e s s u r i z a t i o n / r e l i e f v a l v e a s s o c i a t e d w i t h e a c h r e s e r v o i r a n d l o c a t e d
o n t h e g r o u n d s e r v i c e p a n e l o f e a c h s y s t e m e n a b l e s :
. o v e r p r e s s u r e t o b e a v o i d e d i n t h e r e s e r v o i r b y e v a c u a t i o n o f a i r o r
f l u i d . V a l v e s e t t i n g :
4 . 2 + 0 . 3 - 0 . 2 b a r s , ( 6 0 . 9 + 4 . 3 - 2 . 9 p s i ) p r e s s u r e i n c r e a s i n g
3 . 7 ± 0 . 1 b a r s , ( 5 3 . 6 ± 1 . 4 p s i ) p r e s s u r e d e c r e a s i n g
. e a c h r e s e r v o i r t o b e i n d i v i d u a l l y d e p r e s s u r i z e d .
- A p r e s s u r e r e d u c i n g v a l v e o n t h e l i n e f r o m t h e L e n g i n e H P s t a g e r e g u -
l a t e s p r e s s u r e i n t h e r e s e r v o i r t o 3 . 5 b a r s r e l a t i v e . P r e s s u r e r e d u c i n g
v a l v e i s s e t t o 3 . 5 ± 0 1 b a r s ( 5 0 ± 1 . 4 p s i )
- M a x i m u m p r e s s u r e d e l i v e r e d b y t h e a i r b l e e d s y s t e m i s 3 b a r s . ( 4 3 . 5 p s i ) .
- O n e a c h r e s e r v o i r , a p r e s s u r e s w i t c h w a r n s t h e c r e w o f l o w a i r p r e s s u r e .
P r e s s u r e s w i t c h s e t t i n g :
. 1 . 5 b a r s ( 2 1 . 7 p s i ) - p r e s s u r e d e c r e a s i n g ( w a r n i n g a c t i v a t i o n )
. 1 . 7 b a r s m a x ( 2 4 . 6 p s i ) - p r e s s u r e i n c r e a s i n g ( w a r n i n g d e - a c t i v a t i o n ) .
- A r e s t r i c t o r , m o u n t e d i n t h e p y l o n o n t h e l i n e f r o m t h e L e n g i n e i s i n -
t e n d e d t o l i m i t t h e a i r f l o w s o a s o b t a i n a n a c c e p t a b l e t e m p e r a t u r e i n t h e
e v e n t o f r u p t u r e o f t h e p r e s s u r i z a t i o n s y s t e m i n t h e w i n g o r f u s e l a g e .
T h e r e s t r i c t o r i s p r o t e c t e d b y a f i l t e r i n c o r p o r a t i n g a s t a i n l e s s s t e e l
m e t a l l i c s c r e e n .
- A f i l t e r , e q u i p p e d w i t h a b y - p a s s a n d b y - p a s s o p e n i n g i n d i c a t o r , i s m o u n t e d
i n t h e w i n g , o n t h e p r e s s u r i z a t i o n l i n e f r o m t h e L e n g i n e , u p s t r e a m o f
t h e p r e s s u r e r e d u c i n g v a l v e . T h i s f i l t e r i s i n t e n d e d t o p r o t e c t t h e p r e s -
s u r e r e d u c i n g v a l v e a n d c h e c k v a l v e s f r o m a n y c o n t a m i n a t i o n f r o m t h e
e n g i n e .
- T h e c h e c k v a l v e s m o u n t e d i n t h e s y s t e m a n d o n t h e r e s e r v o i r a r e o f t h e
f l a p p e r t y p e .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
FIN FUNCTIONAL DESIGNATION PANEL ZONE ACCESS ATA
DOOR REF.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2 9 1 3 7 6 F I L T E R - R S V R P R E S S U R I Z A T I O N 5 7 1 5 7 1 D B 2 9 - 1 4 - 1 3
291378 CHECK VALVE - ENG1 PRESS LINE ISOL 571 571DB 29-14-14
291380 VALVE - PRESS REDUCING 571 571AB 29-14-12
291382 CHECK VALVE - ENG1 PRESS LINE GND ISOL 571 571DB 29-14-14
291383 PRESS GAGE - RSVR AIR, G 147 734
291391 GROUND CONNECTOR - RSVR PRESSURIZATION 571 571BB
2 9 1 3 9 2 R E S T R I C T O R / F I L T E R - P R E S S L I N E , E N G 1 4 1 1 2 9 - 1 4 - 1 5
291394 CHECK VALVE - APU PRESS LINE ISOL 148 744 29-14-17
2 9 1 3 9 8 F I L T E R - R S V R P R E S S U R I Z A T I O N 1 4 3 1 4 7 B Z 2 9 - 1 4 - 1 3
292383 PRESS GAGE - RSVR AIR, B 571 571DB
293383 PRESS GAGE - RSVR AIR, Y 671 671DB

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-58
58
A300/Some A310 - Hydraulic Reservoir Pressurization System - PW JT9D-7R4 Engine
A300
A300
ENG 1 PRESSURIZATION LINE
ENG 1 PRESSURIZATION
LINE ISOLATING
LINE ISOLATING
RESERVOIR
RESERVOIR
PRESSURIZATION
PRESSURIZATION
RESERVOIRPRESSURIZATION
APU PRESSURIZATION
APU PRESSURIZATION
LINE ISOLATING
LINE ISOLATING
RESERVOIRAIR
RESERVOIRAIR

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-59
59
Some A310 - Hydraulic Reservoir Pressurization System - PW JT9D-7R4 Engine
P u r p o s e
- T o e n s u r e i n e a c h h y d r a u l i c r e s e r v o i r a n a i r p r e s s u r e o f 3 t o 3 . 5 b a r s
( 4 3 . 5 t o 5 0 . 7 p s i ) r e l a t i v e s o a s t o p r e v e n t c a v i t a t i o n o f p u m p s o n t h e
g r o u n d a n d t h r o u g h o u t t h e w h o l e f l i g h t e n v e l o p e .
- T o m a i n t a i n t h e r e s e r v o i r s u f f i c i e n t l y a i r - t i g h t i n t h e e v e n t o f f a i l u r e
t h e p r e s s u r i z a t i o n s y s t e m o r a f t e r e n g i n e s h u t - d o w n .
a i r b l e d f r o m t h e 1 5 t h s t a g e ( P & W e n g i n e s ) o f t h e L e n g i n e H P c o m -
c o m p r e s s o r o r f r o m t h e a i r b l e e d s y s t e m , o r , w h e n t h e e n g i n e s a r e s h u t
a i r b l e d f r o m t h e 1 4 t h s t a g e ( G E e n g i n e s ) o f t h e L e n g i n e H P c o m p r e s s o r
o r f r o m t h e a i r b l e e d s y s t e m , o r , w h e n t h e e n g i n e s a r e s h u t d o w n , f r o m t h e
- A d e p r e s s u r i z a t i o n / r e l i e f v a l v e a s s o c i a t e d w i t h e a c h r e s e r v o i r a n d l o c a t e d
o n t h e g r o u n d s e r v i c e p a n e l o f e a c h s y s t e m e n a b l e s :
. o v e r p r e s s u r e t o b e a v o i d e d i n t h e r e s e r v o i r b y e v a c u a t i o n o f a i r o r
f l u i d . V a l v e s e t t i n g :
4 . 2 + 0 . 3 - 0 . 2 b a r s , ( 6 0 . 9 + 4 . 3 - 2 . 9 p s i ) p r e s s u r e i n c r e a s i n g
3 . 7 ± 0 . 1 b a r s , ( 5 3 . 6 ± 1 . 4 p s i ) p r e s s u r e d e c r e a s i n g
. e a c h r e s e r v o i r t o b e i n d i v i d u a l l y d e p r e s s u r i z e d .
- A p r e s s u r e r e d u c i n g v a l v e o n t h e l i n e f r o m t h e L e n g i n e H P s t a g e r e g u -
l a t e s p r e s s u r e i n t h e r e s e r v o i r t o 3 . 5 b a r s r e l a t i v e . P r e s s u r e r e d u c i n g
v a l v e i s s e t t o 3 . 5 ± 0 1 b a r s ( 5 0 ± 1 . 4 p s i )
- M a x i m u m p r e s s u r e d e l i v e r e d b y t h e a i r b l e e d s y s t e m i s 3 b a r s . ( 4 3 . 5 p s i ) .
- O n e a c h r e s e r v o i r , a p r e s s u r e s w i t c h w a r n s t h e c r e w o f l o w a i r p r e s s u r e .
P r e s s u r e s w i t c h s e t t i n g :
. 1 . 5 b a r s ( 2 1 . 7 p s i ) - p r e s s u r e d e c r e a s i n g ( w a r n i n g a c t i v a t i o n )
. 1 . 7 b a r s m a x ( 2 4 . 6 p s i ) - p r e s s u r e i n c r e a s i n g ( w a r n i n g d e - a c t i v a t i o n ) .
- A r e s t r i c t o r , m o u n t e d i n t h e p y l o n o n t h e l i n e f r o m t h e L e n g i n e i s i n -
t e n d e d t o l i m i t t h e a i r f l o w s o a s o b t a i n a n a c c e p t a b l e t e m p e r a t u r e i n t h e
e v e n t o f r u p t u r e o f t h e p r e s s u r i z a t i o n s y s t e m i n t h e w i n g o r f u s e l a g e .
T h e r e s t r i c t o r i s p r o t e c t e d b y a f i l t e r i n c o r p o r a t i n g a s t a i n l e s s s t e e l
m e t a l l i c s c r e e n .
- A f i l t e r , e q u i p p e d w i t h a b y - p a s s a n d b y - p a s s o p e n i n g i n d i c a t o r , i s m o u n t e d
i n t h e w i n g , o n t h e p r e s s u r i z a t i o n l i n e f r o m t h e L e n g i n e , u p s t r e a m o f
t h e p r e s s u r e r e d u c i n g v a l v e . T h i s f i l t e r i s i n t e n d e d t o p r o t e c t t h e p r e s -
s u r e r e d u c i n g v a l v e a n d c h e c k v a l v e s f r o m a n y c o n t a m i n a t i o n f r o m t h e
e n g i n e .
- T h e c h e c k v a l v e s m o u n t e d i n t h e s y s t e m a n d o n t h e r e s e r v o i r a r e o f t h e
f l a p p e r t y p e .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
FIN FUNCTIONAL DESIGNATION PANEL ZONE ACCESS ATA
DOOR REF.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
291376 FILTER-RSVR PRESSURIZATION 571 571DB 29-14-13
291378 CHECK VALVE-ENG1 PRESS LINE ISOL 571 571BB 29-14-14
291380 VALVE-PRESS REDUCING, ENG1 PRES- 571 571DB 29-14-12
291382 CHECK VALVE-ENG1 PRESS LINE ISOL 571 571DB 29-14-14
291383 PRESS GAGE-RSVR AIR, G 147 734 29-14-33
291391 GROUND CONNECTOR-RSVR PRESSURIZATION 571 571DB 29-14-21
291392 RESTRICTOR/FILTER-PRESS LINE, ENG1 411 29-14-15
291394 CHECK VALVE-APU PRESS LINE ISOL 143 147BZ 29-14-17
291398 FILTER-RSVR PRESSURIZATION 143 147BZ 29-14-13

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-60
60
A300/Some A310 - Hydraulic Reservoir Pressurization System - PW JT9D-7R4 Engine
A300
A300
LINE ISOLATING
LINE ISOLATING
RESERVOIR
RESERVOIR
PRESSURIZATION
PRESSURIZATION
APU PRESSURIZATION
APU PRESSURIZATION
LINE ISOLATING
LINE ISOLATING
RESERVOIRAIR
RESERVOIRAIR

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-61
61
A300/A310 RH ECAM Hydraulic Fluid Reservoir - Quantity Indication
SERVICING
The top of the upper Green arcs on the overhead indicators are NOT the
"full marks" for the systems. The upper Green arcs are intended to show
the normal service range with the aircraft on the ground. This service
range allows for the normal thermal expansion of the hydraulic fluid.
The hydraulic fluid has an average coefficient of thermal expansion of
0.00085 per degree C. An aircraft might indicate a fluid level near the
bottom of the normal service range after an overnight stay at EWR
(Newark) (20°F/-7°C). The same aircraft, with no reservoir servicing,
could indicate an hydraulic fluid level near the top of the normal service
range after an overnight at IAH (Houston) (86°F/30°C).
FedEx A310-200 series aircraft were acquired with two types of flight
deck Overhead Panel Hydraulic Fluid Quantity Indicators. The upper
Green arcs on the indicators on older aircraft are smaller than those used
on later A310 aircraft.
ACTION
The ECAM hydraulics page should always be consulted before changing
the level in the hydraulic fluid reservoirs. The ECAM quantity indication
should be considered correct for all A300-600R and A310-200 series
aircraft.
If the triangular pointer is in the normal service range on the ECAM
hydraulics page, the fluid level in the hydraulic reservoirs should be
considered normal. The ECAM normal service range corresponds to the
upper Green arcs on the later overhead indicators.
If an hydraulic reservoir requires service, it should be filled only to the full
mark corresponding to that system on the ground servicing panel. Never
fill the reservoirs above the full level indicated on the Green ground
service panel. If a reservoir is over-filled while being serviced, it should
be drained to the proper level. Over-filling a system will cause additional
maintenance and could damage the reservoir.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-62
62
A300/A310 Hydraulic Reservoirs and Pressurization System - Schematic

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-63
63
A300/A310 RH ECAM HYD Page
NORMAL SERVICE RANGE
NORMAL SERVICE RANGE
WITH A/C ON THE GROUND
WITH A/C ON THE GROUND
A300
A300
Overhead Panel
Overhead Panel
HYD PWR 427 VU Panel
HYD PWR 427 VU Panel
Some
Some
A310s
A310s

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-64
64
LEFT BLANK
LEFT BLANK

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-65
65
A300/A310 Hydraulic System Reservoir Air Lights - MEL Requirements
AIR Light
In Normal configuration, the AIR light is extinguished and
the legend is not visible.
The legend comes on amber when reservoir air pressure is
below 22 PSI. Illumination of the AIR light is associated with
SC and ECAM activation
On A300-600 and some A310-200 aircraft AIR light
illumination is also accompanied by illumination of the
Master CAUTION lights on the CAPT and F/O Main
Instrument Panels 3VU and 5VU. On remaining A310-200
aircraft, it is accompanied by illumination of the HYD light on
the Warning Light Display Panel.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-66
66
A300/A310 Hydraulic System Reservoir Air Lights - MEL Requirements

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-67
67
GREEN
AUXILIARY HYDRAULIC
SYSTEM NUMBER 1

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-68
68
A300/A310 Green Auxiliary Hydraulic Power - Description
DESCRIPTION
Two parallel-mounted electric pumps supply power:
- To the Green system, directly,
- To the Blue and Yellow systems, through Green/Blue and
Green/Yellow power transfer units.
Both electric pumps draw fluid from the Green system reservoir, and are
of the soft compensation type. They are used mainly on the ground, for
testing or pre-flight check list procedures, but can also be used in flight,
at the crew's discretion, to boost fluid flow. However, such cases of
utilization are never of a mandatory nature.
LOCATION
Installed in the fuselage center section (hydraulics compartment) on the
ceiling, between FR52 and FR53.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-69
69
A300/A310 Green Auxiliary Hydraulic Power

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-70
70
A300 Green Hydraulic System - Electric Pumps - General
H y d r a u l i c P u m p
A p r e s s u r e c o m p e n s a t i n g m e c h a n i s m i s i n c o r p o r a t e d , w h i c h o p e r a t e s t o k e e p
t h e d e l i v e r y s m o o t h a n d c o n s t a n t b y a l t e r i n g t h e a n g l e o f t h e i n c l i n e d
h a n g e r f a c e i n r e s p o n s e t o s y s t e m p r e s s u r e f l u c t u a t i o n s . P r e s s u r e i s
m a i n t a i n e d w i t h i n a p r e s e l e c t e d r a n g e i n r e s p o n s e t o v a r i a t i o n s i n s y s t e m
demand.
T h e d i s c h a r g e f l o w d e c r e a s e s g r a d u a l l y i n t h e t h r e e s t e p s a s s h o w n i n t h e
c u r v e o f n o m i n a l p u m p - m o t o r p e r f o r m a n c e :
- O u t p u t p r e s s u r e a t z e r o d e l i v e r y : 2 0 6 + 4 - 0 b a r s ( 3 0 2 8 P S I ( + 7 0 / - 0 P S I ) )
- O u t p u t p r e s s u r e f o r d e l i v e r y o f 2 3 l / m n : 1 9 5 b a r s ( 6 . 1 G P M / M I N @ 2 8 6 7 P S I )
- O u t p u t p r e s s u r e f o r d e l i v e r y o f 3 6 l / m n : 1 1 5 b a r s . ( 9 . 5 1 G P M / M I N @ 1 6 9 0 P S I )
N O T E : B e t w e e n 2 3 a n d 3 6 l / m n , o u t l e t p r e s s u r e v a r i e s l i n e a r l y f r o m
1 9 5 b a r s t o 1 1 5 b a r s .
- S u c t i o n p r e s s u r e
. 1 b a r a b s o l u t e f o r d e l i v e r y o f 3 6 l / m n ( 9 . 5 1 G P M )
. 0 . 6 b a r a b s o l u t e f o r d e l i v e r y o f 3 5 l / m n ( 9 . 2 5 G P M )
. 0 . 2 b a r a b s o l u t e f o r d e l i v e r y o f 0 t o 3 0 l / m n . ( 0 T O 7 . 9 2 G P M )
- T o l e r a n c e o n d e l i v e r y , p r e s s u r e a n d e l e c t r i c a l v a l u e s i s ± 2 %
.
WARNI N G : MAKE CERTAIN THAT THE GREEN RESERVOI R IS PRESSURIZED TO
AVOID ELECTRIC PUMPS CAVITATION DURING THEIR OPERATION.
E l e c t r i c M o t o r
- C o n t i n u o u s d u t y o p e r a t i o n o n a l t e r n a t i n g c u r r e n t
- C u r r e n t : 4 5 A m a x . i n c o n t i n u o u s o p e r a t i o n a t f u l l l o a d
- T h e m o t o r i s c o n n e c t e d t o t h e b u s b a r b y a t r i p l e c o n d u c t o r c a b l e ; t h e
i m p e d a n c e o f e a c h c o n d u c t o r i s s u c h t h a t t h e i n - l i n e v o l t a g e d r o p i s
a p p r o x i m a t e l y 5 . 5 V f o r t h e r a t e d l o a d
- M e a n n o m i n a l v o l t a g e o f 3 p h a s e s a t t h e b u s b a r : 1 1 5 / 2 0 0 V
- M e a n l i m i t v o l t a g e o f 3 - p h a s e s a t t h e b u s b a r : 1 1 1 a n d 1 1 9 V
- I n n o r m a l o p e r a t i o n a t n o m i n a l p o w e r , t h e m e a n v o l t a g e o f t h e t h r e e
p h a s e s a t t h e m o t o r t e r m i n a l s m a y t h e r e f o r e d r o p t o 1 0 5 . 5 V , t a k i n g i n t o
a c c o u n t v o l t a g e v a r i a t i o n s d u e t o r e g u l a t i o n .
- R o t a t i o n a l s p e e d : a p p r o x i m a t e l y 7 7 0 0 r p m
- A i r c o o l e d .
NOTE: 1 U.S. gallon = 3.785 liters.
Both pumps are controlled simultaneously by a pushbutton switch on the
HYD PWR section of the overhead panel. When operated, the complete
GREEN system is pressurized. Electrical power supply for the AC motors
is from AC BUS 1 and AC BUS 2 respectively.
PRESSURE SWITCHES AND PRESSURE TRANSMITTERS
The pressure switches are installed:
1 on the delivery line of each engine pump to activate a warning in the
event of pump low pressure condition.
1 on the common delivery line of the Green system electric pumps to
indicate a pressure drop when these electric pumps are supplied with
power.
-1 on the HP manifold of each system to indicate a low
pressure condition in the system.
-1 on the servo controls manifold of each system to indicate a
low pressure condition.
-1 on the ram air turbine pump delivery system, mounted on
the ground checkout module.
-1 on each reservoir to detect a low air pressure condition.
A pressure transmitter is mounted on the manifold of each of the three
systems.
The operating principle is based on a variable reluctance. Electric Pump
Circuit Breakers (CB) CB Panel 101 VU (GEN 1/GEN 2) Avionics Bay
-Green Electric Pump Number 1:
-Rated: 50 Amps
-Location: LH Side CB Panel 101 VU
-CB FIN: 1GE Green Electric Pump Number 2:
-Rated: 50 Amps
-Location: RH Side CB Panel 101 VU CB FIN: 2GE

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-71
71
A300 Green Hydraulic System Electric Pumps - General Installation
Removal
CAUTION: CHECK THE HYDRAULIC SYSTEM FILTERS IF THE PUMP HAS BEEN
REMOVEDBECAUSE OF OPERATION WITHOUT FLUID, OR BECAUSE OF
MALFUNCTIONING AND HENCE POSSIBLE INTERNAL DAMAGE. IF FOREIGN
MATTER IS FOUND ON THE FILTERS, THE LINES CONNECTING THE PUMP TO THE
FILTERS MUST BE FLUSHED. SUPPORT THE PUMP DURING REMOVAL AND
INSTALLATION OPERATIONS. APPROXIMATE WEIGHT : 12.7 kg (28 lb.) AFTER
REMOVAL CHECK THAT THE SHOCKMOUTS AND THE SHOCKMOUTS AND THE
PUMP ATTACHMENT FITTINGS ARE NOT DAMAGED. IF ONE PART IS DAMAGED.
SUBSTITUTE A NEW COMPLETE SET FOR USED ONE.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-72
72
A310 Green Hydraulic System - Electric Pumps - General
H y d r a u l i c P u m p
A p r e s s u r e c o m p e n s a t i n g m e c h a n i s m i s i n c o r p o r a t e d , w h i c h o p e r a t e s t o k e e p
t h e d e l i v e r y s m o o t h a n d c o n s t a n t b y a l t e r i n g t h e a n g l e o f t h e i n c l i n e d
h a n g e r f a c e i n r e s p o n s e t o s y s t e m p r e s s u r e f l u c t u a t i o n s . P r e s s u r e i s
m a i n t a i n e d w i t h i n a p r e s e l e c t e d r a n g e i n r e s p o n s e t o v a r i a t i o n s i n s y s t e m
demand.
T h e d i s c h a r g e f l o w d e c r e a s e s g r a d u a l l y i n t h e t h r e e s t e p s a s s h o w n i n t h e
c u r v e o f n o m i n a l p u m p - m o t o r p e r f o r m a n c e :
- O u t p u t p r e s s u r e a t z e r o d e l i v e r y : 2 0 6 + 4 - 0 b a r s ( 3 0 2 8 P S I ( + 7 0 / - 0 P S I ) )
- O u t p u t p r e s s u r e f o r d e l i v e r y o f 2 3 l / m n : 1 9 5 b a r s ( 6 . 1 G P M / M I N @ 2 8 6 7 P S I )
- O u t p u t p r e s s u r e f o r d e l i v e r y o f 3 6 l / m n : 1 1 5 b a r s . ( 9 . 5 1 G P M / M I N @ 1 6 9 0 P S I )
N O T E : B e t w e e n 2 3 a n d 3 6 l / m n , o u t l e t p r e s s u r e v a r i e s l i n e a r l y f r o m
1 9 5 b a r s t o 1 1 5 b a r s .
- S u c t i o n p r e s s u r e
. 1 b a r a b s o l u t e f o r d e l i v e r y o f 3 6 l / m n ( 9 . 5 1 G P M )
. 0 . 6 b a r a b s o l u t e f o r d e l i v e r y o f 3 5 l / m n ( 9 . 2 5 G P M )
. 0 . 2 b a r a b s o l u t e f o r d e l i v e r y o f 0 t o 3 0 l / m n . ( 0 T O 7 . 9 2 G P M )
- T o l e r a n c e o n d e l i v e r y , p r e s s u r e a n d e l e c t r i c a l v a l u e s i s ± 2 %
.
WARNI N G : MAKE CERTAIN THAT THE GREEN RESERVOI R IS PRESSURIZED TO
AVOID ELECTRIC PUMPS CAVITATION DURING THEIR OPERATION.
E l e c t r i c M o t o r
- C o n t i n u o u s d u t y o p e r a t i o n o n a l t e r n a t i n g c u r r e n t
- C u r r e n t : 4 5 A m a x . i n c o n t i n u o u s o p e r a t i o n a t f u l l l o a d
- T h e m o t o r i s c o n n e c t e d t o t h e b u s b a r b y a t r i p l e c o n d u c t o r c a b l e ; t h e
i m p e d a n c e o f e a c h c o n d u c t o r i s s u c h t h a t t h e i n - l i n e v o l t a g e d r o p i s
a p p r o x i m a t e l y 5 . 5 V f o r t h e r a t e d l o a d
- M e a n n o m i n a l v o l t a g e o f 3 p h a s e s a t t h e b u s b a r : 1 1 5 / 2 0 0 V
- M e a n l i m i t v o l t a g e o f 3 - p h a s e s a t t h e b u s b a r : 1 1 1 a n d 1 1 9 V
- I n n o r m a l o p e r a t i o n a t n o m i n a l p o w e r , t h e m e a n v o l t a g e o f t h e t h r e e
p h a s e s a t t h e m o t o r t e r m i n a l s m a y t h e r e f o r e d r o p t o 1 0 5 . 5 V , t a k i n g i n t o
a c c o u n t v o l t a g e v a r i a t i o n s d u e t o r e g u l a t i o n .
- R o t a t i o n a l s p e e d : a p p r o x i m a t e l y 7 7 0 0 r p m
- A i r c o o l e d .

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-73
73
A310 Green Hydraulic System Electric Pumps - Component Location

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-74
74
A300/A310 Blue Main Hydraulic Power - Description
GENERAL
- This system is the least complex of the three.
- It supplies only the flight controls.
- It is pressurized by:
- the pump driven by the L engine
- the Green/Blue power transfer unit
- a ground power cart.
The self-sealing connectors for connection of ground power carts are
located in a service panel under the L wing. These connectors include
one for connection of pneumatic ground equipment, used to pressurize
the three reservoirs simultaneously.
USERS
A. Supplied through the servo controls manifold (or through wing and
aft fuselage isolation valves).
- Two all speed aileron servo controls (L and R ASA)
- Two elevator servo controls (L and R)
- Six actuators on L and R spoilers 1, 4 and 7 (A300)
- One yaw damper actuator servo motor.
B. Supplied through the HP manifold, via a priority valve:
- One slat power control unit hydraulic motor.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-75
75
A300 Blue Hydraulic Power System - Schematic

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-76
76
BLUE
MAIN HYDRAULIC
SYSTEM NUMBER 2

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-77
77
A300/A310 Blue Main Hydraulic Power - Description
GENERAL
- This system is the least complex of the three.
- It supplies only the flight controls.
- It is pressurized by:
- the pump driven by the L engine
- the Green/Blue power transfer unit
- a ground power cart.
The self-sealing connectors for connection of ground power carts are
located in a service panel under the L wing. These connectors include
one for connection of pneumatic ground equipment, used to pressurize
the three reservoirs simultaneously.
USERS
A. Supplied through the servo controls manifold (or through wing and
aft fuselage isolation valves).
- Two all speed aileron servo controls (L and R ASA)
- Two elevator servo controls (L and R)
- One yaw damper actuator servo motor.
B. Supplied through the HP manifold, via a priority valve:
- One slat power control unit hydraulic motor.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-78
78
A310 Blue Hydraulic Power System - Schematic

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-79
79
A300 Blue Main Hydraulic Power - Component Locations and FIN
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
F I N F U N C T I O N A L D E S I G N A T I O N P A N E L Z O N E A C C E S S A T A
DOOR REF.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2 9 2 0 0 0 R E S E R V O I R - H Y D R A U L I C , B L U E 5 7 1 5 7 1 A B 2 9 - 1 1 - 1 1
2 9 2 0 0 2 F I L T E R - R S V R R E T U R N , B L U E 5 7 1 5 7 1 A B 2 9 - 1 1 - 1 5
2 9 2 0 0 5 V A L V E - D E P R E S S / R E L I E F , B R S V R 5 7 1 5 7 1 B B
2 9 2 0 0 6 G R O U N D C O N N E C T O R - S U C T I O N , B 5 7 1 5 7 1 B B
2 9 2 0 0 8 G R O U N D C O N N E C T O R - D E L I V E R Y , B 5 7 1 5 7 1 B B
2 9 2 0 1 0 M A N I F O L D - S E R V O C O N T R O L S , B 1 4 7 7 3 4 2 9 - 1 2 - 3 4
2 9 2 0 3 0 P U M P - B L U E , E N G 1 4 3 5 4 3 5 A L 2 9 - 1 1 - 3 2
2 9 2 0 4 0 V A L V E - N O N R E T U R N 4 2 0
2 9 2 0 4 8 F I L T E R - B P U M P D E L I V E R Y , E N G 1 1 4 7 7 3 4 2 9 - 1 1 - 4 2
2 9 2 0 6 0 M A N I F O L D - H P , B L U E 1 4 7 7 3 4 2 9 - 1 2 - 1 2
2 9 2 0 6 3 R E L I E F V A L V E - B L U E P U M P D E L I V E R Y 1 4 7 7 3 4 2 9 - 1 1 - 5 5
2 9 2 0 7 0 A C C U - B L U E P W R 1 4 7 7 3 4 2 9 - 1 1 - 5 6
2 9 2 0 7 2 P R E S S G A G E - B L U E A C C U 1 4 7 7 3 4
9 G J V A L V E - B L U E P U M P F I R E , E N G 1 5 7 5 5 7 5 F B 2 9 - 1 1 - 3 3
29WW PRESS SWI T C H - H P M A N I F O L D , B 1 4 7 7 3 4
F I L T E R M O D U L E A S S Y - E N G P U M P C A S E 4 5 2 4 5 2 A R
DRAI N
F I L T E R - E N G P U M P C A S E D R A I N 4 5 2 4 5 2 A R
2 9 2 0 0 4 M A N I F O L D - L P , B L U E 1 4 7 7 3 4
2 9 2 0 9 5 C H E C K V A L V E - G / B P T U D E L I V E R Y 1 4 7 7 3 4
2 9 2 0 5 0 C H E C K V A L V E - B P U M P D E L I V E R Y , E N G 1 1 4 7 7 3 4
2 9 2 0 1 4 C H E C K V A L V E - C A S E D R A I N , B 1 4 7 7 3 4
2 9 2 0 2 2 C H E C K V A L V E - R E T U R N , B H P M A N I F O L D 1 4 7 7 3 4
33GJ PRESS SWI T C H - B P U M P , E N G 1 4 7 3 4 7 3 A L

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-80
80
A300 Blue Main Hydraulic Power - Component Location and FIN

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-81
81
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
DOOR REF.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2 9 2 0 0 0 R E S E R V O I R - H Y D R A U L I C , B L U E 5 7 1 5 7 1 A B 2 9 - 1 1 - 1 1
2 9 2 0 0 2 F I L T E R - R S V R R E T U R N , B L U E 5 7 1 5 7 1 A B 2 9 - 1 1 - 1 5
2 9 2 0 0 5 V A L V E - D E P R E S S / R E L I E F , B R S V R 5 7 1 5 7 1 B B
2 9 2 0 0 6 G R O U N D C O N N E C T O R - S U C T I O N , B 5 7 1 5 7 1 B B
2 9 2 0 0 8 G R O U N D C O N N E C T O R - D E L I V E R Y , B 5 7 1 5 7 1 B B
2 9 2 0 3 0 P U M P - B L U E , E N G 1 4 3 5 4 3 5 A L 2 9 - 1 1 - 3 2
2 9 2 0 4 0 V A L V E - N O N R E T U R N 4 2 0
2 9 2 0 4 8 F I L T E R - B P U M P D E L I V E R Y , E N G 1 1 4 7 7 3 4 2 9 - 1 1 - 4 2
2 9 2 0 6 0 M A N I F O L D - H P , B L U E 1 4 7 7 3 4 2 9 - 1 2 - 1 2
2 9 2 0 6 3 R E L I E F V A L V E - B L U E P U M P D E L I V E R Y 1 4 7 7 3 4 2 9 - 1 1 - 5 5
2 9 2 0 7 0 A C C U - B L U E P W R 1 4 7 7 3 4 2 9 - 1 1 - 5 6
2 9 2 0 7 2 P R E S S G A G E - B L U E A C C U 1 4 7 7 3 4
9 G J V A L V E - B L U E P U M P F I R E , E N G 1 5 7 5 5 7 5 F B 2 9 - 1 1 - 3 3
29WW PRESS SWI T C H - H P M A N I F O L D , B 1 4 7 7 3 4
F I L T E R M O D U L E A S S Y - E N G P U M P C A S E 4 5 2 4 5 2 A R
DRAI N
F I L T E R - E N G P U M P C A S E D R A I N 4 5 2 4 5 2 A R
2 9 2 0 0 4 M A N I F O L D - L P , B L U E 1 4 7 7 3 4
33GJ PRESS SWI T C H - B P U M P , E N G 1 4 7 3 4 7 3 A L

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-82
82

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-83
83
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
DOOR REF.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2 9 2 0 0 0 R E S E R V O I R - H Y D R A U L I C , B L U E 5 7 1 5 7 1 B B 2 9 - 1 1 - 1 1
2 9 2 0 0 2 F I L T E R - R S V R R E T U R N , B L U E 5 7 1 2 9 - 1 1 - 1 5
2 9 2 0 0 5 V A L V E - D E P R E S S / R E L I E F , B R S V R 5 7 1 5 7 1 D B
2 9 2 0 0 6 G R O U N D C O N N E C T O R - S U C T I O N , B 5 7 1 5 7 1 D B
2 9 2 0 0 8 G R O U N D C O N N E C T O R - D E L I V E R Y , B 5 7 1 5 7 1 D B
2 9 2 0 3 0 P U M P - B L U E , E N G 1 4 5 2 4 5 2 A R 2 9 - 1 1 - 3 2
9 G J V A L V E - B L U E P U M P F I R E , E N G 1 5 7 5 5 7 5 A L 2 9 - 1 1 - 3 3
2 9 2 0 4 0 V A L V E - N O N R E T U R N 4 2 0
2 9 2 0 4 8 F I L T E R - B P U M P D E L I V E R Y , E N G 1 5 7 1 2 0 - 1 1 - 4 2
2 9 2 0 6 0 M A N I F O L D - H P , B L U E 5 7 1 7 3 4 2 9 - 1 2 - 1 2
2 9 2 0 6 3 R E L I E F V A L V E - B L U E P U M P D E L I V E R Y 5 7 1 2 9 - 1 1 - 5 5
2 9 2 0 7 0 A C C U - B L U E P W R 5 7 1 2 9 - 1 1 - 5 6
2 9 2 0 7 2 P R E S S G A G E - B L U E A C C U 5 7 1
29WW PRESS SWI T C H - H P M A N I F O L D , B 5 7 1
2 9 2 0 0 4 M A N I F O L D - L P , B L U E 5 7 1
3 3 G J P R E S S S W I T C H - B P U M P , E N G 1 4 7 3 4 7 3 A L 2 9 - 1 2 - 6 2
F I L T E R S - E N G I N E - P U M P C A S E 4 3 5 4 3 5 A L 2 9 - 1 1 - 3 6
DRAI N

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-84
84
A310 Blue Main Hydraulic Power - Component Locations”

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-85
85
BLUE
AUXILIARY HYDRAULIC
SYSTEM
NUMBER 2

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-86
86
Blue Auxiliary Hydraulic Power System
DESCRIPTION
The Green/Blue power transfer unit is composed of an hydraulic motor
driving an hydraulic pump by means of a mechanical liaison (shaft).
The motor operates off fluid supplied from the Green system; the pump
pressurizes the Blue system and draws its fluid from the Blue system
reservoir. This system allows transfer of power, while maintaining
independence of the fluid sources. A solenoid or motor-controlled flow
shut off valve integral with the motor enables activation or deactivation of
the transfer unit.
The transfer unit is used mainly on the ground to pressurize the Blue
system by means of the Green system, which is itself pressurized by the
Green system electric pumps or by a ground power cart. It may also be
used in flight to compensate for failure of the Blue system engine pump.
Transfer unit operation is initiated by commanding opening of the motor
section solenoid-controlled flow shut off valve.
To prevent transfer unit overspeed occurring in the event of a Blue
system pressure line rupture, the motor section includes a flow limiter.
LOCATION - INSTALLATION
The power transfer unit is located in the wing center box, at FR53, on the
left side of the fuselage. It is attached through flexible fittings to a rigid
mount, integral with the aircraft structure.
All lines connected to the motor (pressure, return, case drain) and to the
pump (suction, pressure, case drain) are Teflon hoses covered with
stainless steel braid.
CONTROL
The transfer unit is started by means of a PTU pushbutton switch located
on overhead panel 427VU (the transfer unit is activated when the
pushbutton switch is pressed in).
Location – Installation – LH Wing Inboard – Wing Root Area
The power transfer unit is located in the L wing triangular bay (Blue
hydraulics compartment). It is attached through flexible fittings to a rigid
mount, integral with the aircraft structure.
All lines connected to the motor (pressure, return, case drain) and to the
pump (suction, pressure, case drain) are teflon hoses covered with
stainless steel braid.
The transfer unit is installed with respect to the Blue system reservoir in
such a way that there is a constant head of fluid.
The transfer unit is started up by means of a PTU pushbutton switch
located on overhead panel 427VU, (the transfer unit is activated when
the pushbutton switch is pressed in).

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-87
87
A300/A310 Blue Auxiliary Hydraulic Power System

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-88
88
Green/Blue or Green/Yellow Power Transfer Units (PTUs) - General
Each PTU consists of a hydraulic motor driven by GREEN hydraulic
pressure, and a hydraulic pump in the receiving system. Motor and pump
are connected by a drive shaft.
Each motor has an electrovalve which controls pressurized GREEN
hydraulic supply to the motor, the GREEN pressure being generated by
the engine pump or the Green electric pumps.
The nominal output of the pump in the BLUE or in the YELLOW system
is 23.7 gal/min (90 ltr/min) at a pressure of 2500 PSI. With no flow
demand the pressure is 3000 PSI. Each motor in the GREEN system
requires 29.3 gal/min (111 ltr/min) at 3000 PSI to produce the nominal
pump output. Only one PTU may be operated at a time.
Each PTU is controlled by a pushbutton switch on the HYD PWR section
of the overhead panel, which operates the motor electrovalve. A PTU
may be used in flight in case of hydraulic power generation failure in the
BLUE or the YELLOW system. On the ground, with the GREEN system
pressurized by both electric pumps, they are used to pressurize the
BLUE or the YELLOW system for maintenance purpose.
Electrical power for both PTU solenoid valves is from the 28 DC normal
bus.
HIGH PRESSURE MANIFOLD EQUIPMENT
Each high pressure manifold is equipped with:
- one pressure switch
- one pressure transmitter
- an over-pressure relief/manual relief valve (manual relief on ground
only)
- a priority valve.
HP FILTERS
1 - on the main Blue system
2 - on the main Green system
1 - on the main Yellow system
1 - on the Green/Blue power transfer unit delivery line
1 - on the Green/Yellow power transfer unit delivery line
1 - on the Green system braking line 1 -in the reservoir filling system
1 - on the delivery line of the Green system electric pumps.
1 - on the Yellow system electric pump delivery line.
These filters are of the non bypassing type, with a clogging indicator set
to operate at 6 bars (87 PSI) ± 10%. Filtering capability is 3 to 15 microns
(0.0001 in. to 0.0006 in.) absolute.
An automatic shutoff mechanism in the filters prevents any leakage and
any fluid flow between the filter inlet and outlet when the bowl and filter
element are removed and prevents ingress of air into the system when
the filter is installed. Filter elements may be either cleanable or
disposable.

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-89
89
A310 Hydraulic Auxiliary Power System - Power Transfer Unit (PTU) - Component Locations

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-90
90
A300/A310 Hydraulic Systems - G/B or G/Y Power Transfer Unit (PTU) - Schematic
Performance
Pump Motor
Nominal delivery 91 L/MN 121 L/MN
Nominal pressure at nominal delivery 2500 PSI 2500 PSI min
differential
between inlet
and outlet
Max pressure, transfer unit with low delivery 3000 PSI
(3400 PSI, )
exceptionally
provided that
associated
SERVO CTL
pushbutton
switch is in the
OFF position)
3000 PSI
differential
between inlet
and outlet
Suction pressure or nominal pressure 35 PSIG 100 PSIG
Max flow in case drain 8 L/MN 8 L/MN
Max flow across motor (flow limiter setting) 125 L/MN
Green
Pressure
and
Return
Blue or
Yellow
Pressure
G/B PTU - FIN 5GL
G/B PTU - FIN 5GL
G/Y PTU - FIN 6GL
G/Y PTU - FIN 6GL
1 U.S. gallon = 3.785 liters
1 U.S. gallon = 3.785 liters

MTT M540000 / R3.3 01AUG01
MTT M540000 / R3.3 01AUG01
ATA 29
ATA 29
A300/A310
A300/A310
29-
29-91
91
A300/A310 Auxiliary Hydraulic Power System - G/B PTU Control
NOTE: Green/Yellow PTU Control System identical to G/B
NOTE: Green/Yellow PTU Control System identical to G/B
PTU Control System
PTU Control System

ATA 29.pdf

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ATA 29.pdf