T7 Tractor Service Manual

SERVICE MANUAL
T7.170 AutoCommand , T7.170 Power Command , T7.170 Range Command ,
T7.210 AutoCommand , T7.210 Power Command , T7.210 Range Command
84477609A 27/09/2011
EN

Contents
INTRODUCTION
HYDRAULIC, PNEUMATIC, ELECTRICAL, ELECTRONIC SYSTEMS A
PRIMARY HYDRAULIC POWER SYSTEM.............................................. A.10.A
PRIMARY HYDRAULIC POWER SYSTEM Closed center mechanical remote valve ... A.10.B
PRIMARY HYDRAULIC POWER SYSTEM Electro-hydraulic remote valve............. A.10.C
SECONDARY HYDRAULIC POWER SYSTEM.......................................... A.12.A
HYDRAULIC COMMAND SYSTEM...................................................... A.14.A
PNEUMATIC SYSTEM ................................................................... A.20.A
ELECTRICAL POWER SYSTEM ........................................................ A.30.A
ELECTRONIC SYSTEM ................................................................. A.50.A
FAULT CODES ........................................................................... A.50.A
ENGINE AND PTO IN ................................................................... B
ENGINE .................................................................................. B.10.A
FUEL AND INJECTION SYSTEM........................................................ B.20.A
AIR INTAKE SYSTEM.................................................................... B.30.A
EXHAUST SYSTEM...................................................................... B.40.A
EXHAUST SYSTEM Emissions control .................................................. B.40.B
ENGINE COOLANT SYSTEM ........................................................... B.50.A
TRANSMISSION, DRIVE AND PTO OUT........................................ C
TRANSMISSION Semi-Powershift ....................................................... C.20.D
TRANSMISSION Powershift ............................................................. C.20.E
TRANSMISSION Continuously Variable Transmission (CVT) ........................... C.20.G
ADDITIONAL REDUCERS Overdrive .................................................... C.30.D
REAR PTO Mechanical .................................................................. C.40.B
REAR PTO Hydraulic..................................................................... C.40.C
FRONT PTO Hydraulic ................................................................... C.42.C
AXLES, BRAKES AND STEERING................................................. D
FRONT AXLE ............................................................................ D.10.A
REAR AXLE .............................................................................. D.12.A
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2WD-4WD SYSTEM Hydraulic........................................................... D.14.C
STEERING Hydraulic..................................................................... D.20.C
STEERING Autoguidance ................................................................ D.20.E
SERVICE BRAKE Hydraulic.............................................................. D.30.C
SERVICE BRAKE Pneumatic ............................................................ D.30.E
PARKING BRAKE Mechanical ........................................................... D.32.B
PARKING BRAKE Electronic ............................................................. D.32.D
BRAKE CONNECTION Hydraulic ........................................................ D.34.C
SUSPENSION Hydraulic ................................................................. D.40.C
WHEELS AND TRACKS Wheels......................................................... D.50.C
FRAME AND CAB ........................................................................ E
FRAME Primary frame ................................................................... E.10.B
SHIELD................................................................................... E.20.A
USER CONTROLS AND SEAT .......................................................... E.32.A
USER PLATFORM ....................................................................... E.34.A
ENVIRONMENT CONTROL Heating, ventilation and air-conditioning................... E.40.D
HITCH AND WORKING TOOL ....................................................... H
HITCH Front hitch ........................................................................ H.10.B
HITCH Rear hitch......................................................................... H.10.C
HITCH Electronic draft control............................................................ H.10.D
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INTRODUCTION
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Contents
INTRODUCTION
Foreword ........................................................................................ 3
Foreword ........................................................................................ 4
Foreword Ecology and the Environment ........................................................ 9
Safety rules ................................................................................... 10
Torque ........................................................................................ 14
Basic instructions ............................................................................. 16
Conversion factors ............................................................................ 18
Consumables Lubrications and Coolants ..................................................... 19
Capacities ..................................................................................... 22
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INTRODUCTION
Foreword
IMPORTANT INFORMATION
All repair and maintenance works listed in this manual must be carried out only by staff belonging to the NEW HOL-
LAND Service network, strictly complying with the instructions given and using, whenever required, the special tools.
Anyone who carries out the above operations without complying with the prescriptions shall be responsible for the
subsequent damages.
The manufacturer and all the organizations of its distribution chain, including - without limitation - national, regional or
local dealers, reject any responsibility for damages due to the anomalous behavior of parts and/or components not
approved by the manufacturer himself, including those used for the servicing or repair of the product manufactured
or marketed by the Manufacturer. In any case, no warranty is given or attributed on the product manufactured or
marketed by the Manufacturer in case of damages due to an anomalous behavior of parts and/or components not
approved by the Manufacturer.
No reproduction, though partial of text and illustrations allowed.
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INTRODUCTION
Foreword
Technical Information
This manual has been produced by a new technical information system. This new system is designed to deliver
technical information electronically through Web delivery, DVD and in paper manuals. A coding system called ICE
has been developed to link the technical information to other Product Support functions e.g. Warranty.
Technical information is written to support the maintenance and service of the functions or systems on a customers
machine. When a customer has a concern on his machine it is usually because a function or system on his machine
is not working at all, is not working efficiently, or is not responding correctly to his commands. When you refer to the
technical information in this manual to resolve that customers concern, you will find all the information classified using
the new ICE coding, according to the functions or systems on that machine. Once you have located the technical
information for that function or system then you will find all the mechanical, electrical or hydraulic devices, compo-
nents, assemblies and sub assemblies for that function or system. You will also find all the types of information that
have been written for that function or system, the technical data (specifications), the functional data (how it works),
the diagnostic data (fault codes and troubleshooting) and the service data (remove, install adjust, etc.).
By integrating this new ICE coding into technical information , you will be able to search and retrieve just the right
piece of technical information you need to resolve that customers concern on his machine. This is made possible by
attaching 3 categories to each piece of technical information during the authoring process.
The first category is the Location, the second category is the Information Type and the third category is the Product:
• LOCATION - is the component or function on the machine, that the piece of technical information is going to
describe e.g. Fuel tank.
• INFORMATION TYPE - is the piece of technical information that has been written for a particular component or
function on the machine e.g. Capacity would be a type of Technical Data that would describe the amount of fuel
held by the Fuel tank.
• PRODUCT - is the model that the piece of technical information is written for.
Every piece of technical information will have those 3 categories attached to it. You will be able to use any combination
of those categories to find the right piece of technical information you need to resolve that customers concern on his
machine.
That information could be:
• the description of how to remove the cylinder head
• a table of specifications for a hydraulic pump
• a fault code
• a troubleshooting table
• a special tool
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INTRODUCTION
How to Use this Manual
This manual is divided into Sections. Each Section is then divided into Chapters. Contents pages are included at the
beginning of the manual, then inside every Section and inside every Chapter. An alphabetical Index is included at the
end of a Chapter. Page number references are included for every piece of technical information listed in the Chapter
Contents or Chapter Index.
Each Chapter is divided into four Information types:
• Technical Data (specifications) for all the mechanical, electrical or hydraulic devices, components and, assem-
blies.
• Functional Data (how it works) for all the mechanical, electrical or hydraulic devices, components and assem-
blies.
• Diagnostic Data (fault codes, electrical and hydraulic troubleshooting) for all the mechanical, electrical or hy-
draulic devices, components and assemblies.
• Service data (remove disassembly, assemble, install) for all the mechanical, electrical or hydraulic devices,
components and assemblies.
Sections
Sections are grouped according to the main functions or a systems on the machine. Each Section is identified by
a letter A, B, C etc. The amount of Sections included in the manual will depend on the type and function of the
machine that the manual is written for. Each Section has a Contents page listed in alphabetic/numeric order. This
table illustrates which Sections could be included in a manual for a particular product.
SECTION
A - Hydraulic – Pneumatic – Electrical – Electronic Systems
B - Engine and PTO In
C - Transmission, Drive and PTO Out
D - Axles, Brakes and Steering
E - Frame and Cab
F - Frame Positioning
G - Tool Positioning
H - Hitch and Working Tool
J - Excavating and Landscaping
K - Crop Processing
L - Field Processing
PRODUCT
Tractors X X X X X X X X
Vehicles with working arms: backhoes,
excavators, skid steers, .....
X X X X X X X X X
Combines, forage harvesters, balers, .... X X X X X X X X X X
Seeding, planting, floating, spraying
equipment, ....
X X X X X X X X X
Mounted equipment and tools, ..... X X X X
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SERVICE MANUAL
HYDRAULIC, PNEUMATIC, ELECTRICAL, ELECTRONIC SYSTEMS
84477609A 27/09/2011
A

Contents
HYDRAULIC, PNEUMATIC, ELECTRICAL,
ELECTRONIC SYSTEMS - A
PRIMARY HYDRAULIC POWER SYSTEM................................................ A.10.A
T7.170 AutoCommand , T7.170 Power Command , T7.170 Range Command , T7.185 AutoCommand , T7.185 Power Command
, T7.185 Range Command , T7.200 AutoCommand , T7.200 Power Command , T7.200 Range Command , T7.210 AutoCommand ,
T7.210 Power Command , T7.210 Range Command
PRIMARY HYDRAULIC POWER SYSTEM Closed center mechanical remote valve ..... A.10.B
PRIMARY HYDRAULIC POWER SYSTEM Electro-hydraulic remote valve............... A.10.C
SECONDARY HYDRAULIC POWER SYSTEM............................................ A.12.A
HYDRAULIC COMMAND SYSTEM........................................................ A.14.A
PNEUMATIC SYSTEM ..................................................................... A.20.A
ELECTRICAL POWER SYSTEM .......................................................... A.30.A
ELECTRONIC SYSTEM ................................................................... A.50.A
FAULT CODES ............................................................................. A.50.A
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A

HYDRAULIC, PNEUMATIC, ELECTRICAL,
ELECTRONIC SYSTEMS - A
PRIMARY HYDRAULIC POWER SYSTEM - 10.A
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Contents
HYDRAULIC, PNEUMATIC, ELECTRICAL, ELECTRONIC
SYSTEMS - A
PRIMARY HYDRAULIC POWER SYSTEM - 10.A
TECHNICAL DATA
Power beyond
Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Hydraulic pump
Variable displacement pump - General specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Charge pump
General specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FUNCTIONAL DATA
PRIMARY HYDRAULIC POWER SYSTEM
Static description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
T7.170 Range Command, T7.170 Power Command, T7.185 Range Command, T7.185 Power Command, T7.200 Range
Command, T7.200 Power Command, T7.210 Range Command, T7.210 Power Command
Static description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
T7.170 AutoCommand, T7.185 AutoCommand, T7.200 AutoCommand, T7.210 AutoCommand
Hydraulic schema . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Power beyond
Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Hydraulic pump
Variable displacement pump - Dynamic description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Compensator
Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SERVICE
PRIMARY HYDRAULIC POWER SYSTEM
Test Using DATAR Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Hydraulic pump
Variable displacement pump - Overhaul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Variable displacement pump - Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Compensator
Overhaul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Filter
Replace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
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HYDRAULIC, PNEUMATIC, ELECTRICAL, ELECTRONIC SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
Power beyond - Torque
BAIL10CVT060FAB 1
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Hydraulic pump Variable displacement pump - General specification
Variable displacement pump
Type Variable Displacement Closed Centre
Load Sensing Piston Pump
Rotation Clockwise
Pump speed @ engine speed 2400 RPM maximum rated
speed (Theoretical)
3000 RPM
Pump speed @ engine speed 2200 RPM 2750 RPM
Output @ engine speed 2200 RPM (Standard flow) 125 l/min (33.0 US gpm)
Output @ engine speed 2200 RPM(High flow) 140 l/min (37.0 US gpm)
Piston Pump displacement (Standard flow) 56 cm³/rev
Piston Pump displacement (High flow) 63 cm³/rev
Low Standby Pressure 26 bar (377.0 psi) ± 1 bar (14.5 psi)
Low Standby Pressure (with Italian trailer brakes) 36 bar (522.0 psi)
High Standby Pressure 210 bar (3045.00 psi) ± 5 bar (72.5 psi)
Maximum system pressure 245 bar (3552.5 psi)± 5 bar (72.5 psi)
Cooler By Pass valve 5.8 bar (84.1 psi).
Charge Pump
Type Internal rotor gear pump
Charge Pump displacement 74 cm³/rev Standard flow
82 cm³/rev High flow
Output @ engine speed 2200 RPM Standard flow 200 l/min (52.8 US gpm)
Output @ engine speed 2200 RPM Hi flow 225 l/min (59.4 US gpm)
Charge pressure filter dump valve :
Crack open 10 bar (145.0 psi)
Fully open 15 bar (217.5 psi)
Charge pressure 2 - 4 bar (29.0 - 58.0 psi)
Charge pressure switch closes 1 bar (14.5 psi)
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Charge pump - General specification
Charge Pump
Type Internal rotor gear pump
Charge Pump displacement 74 cm³/rev Standard flow
82 cm³/rev High flow
Output @ engine speed 2200 RPM Standard flow 250 l/min (66 US gpm)
Output @ engine speed 2200 RPM Hi flow 250 l/min (66 US gpm)
Charge pressure filter dump valve :
Crack open 10 bar (145.0 psi)
Fully open 15 bar (217.5 psi)
Charge pressure 2 - 4 bar (29.0 - 58.0 psi)
Charge pressure switch closes 1 bar (14.5 psi)
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PRIMARY HYDRAULIC POWER SYSTEM - Static description
T7.170 Range Command, T7.170 Power Command, T7.185 Range Command, T7.185 Power Command, T7.200 Range Command, T7.200 Power
Command, T7.210 Range Command, T7.210 Power Command
The hydraulic systems can be separated into the following circuits :-
High Pressure Circuit
Hydraulic Lift Assembly.
Remote Control Valves.
Trailer Brake (Where Fitted)
Suspended Front Axle.
Front Lift (Where fitted).
Steering Circuit
Steering Motor and Cylinders
Low Pressure Circuit
Independent Power Take Off (PTO).
Differential Lock
Front Wheel Drive engagement
Transmission clutch and synchroniser engagement
Creeper engagement (Where fitted)
Front PTO (Where fitted)
50 kph engagement (Where fitted)
Lubrication Circuit
PTO Clutch Plates
Transmission Clutch Plates.
Transmission Shaft Pressure Lube
Pump Drive Gear Bearing.
Hydraulic Lift Cross Shaft
Options/Configurations
Hydraulic Pump/ HPL/ Remote Valve Options
Less Hydraulic Trailer Brakes With Hydraulic Trailer Brakes Hydraulic Trailer Brake Italy
Variable Displacement Pump.
EDC
Mechanical Remote
Valves
2 Non Configurable
2 Configurable
1 Non Configurable + 2 Configurable
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Electro-Hydraulic
Remote Valves
2, 3, or 4 Electro hydraulically operated valves
Transmission 18 X 6 40KM/H SEMIPOWERSHIFT
18 X 6 35KM/H SEMIPOWERSHIFT
18 X 6 40KM/H FULLPOWERSHIFT
Table 1
The high pressure circuit is of the `Closed Centre Load Sensing' design on all tractor model options fed by a Variable
Displacement Pump.
Figure 1 shows the variable displacement pump and filter assembly.
BAIL07APH323ASA 1
Closed centre remote valves .
There are two types of remote valves available for the closed centre system. Standard fitting are the mechanical
remote valves operated via a cable from within the cab and optional are electro hydraulically operated valves, (1)
Figure 2, which are operated by electrical switches and have their own in built processor to control oil flow via a
solenoid valve.
BAIL10CVT038AAB 2
The hydraulic lift Electronic Draft Control valve (EDC valve) is a stack type proportional solenoid operated valve (1)
mounted with the remote control valves at the rear of the tractor. (Refer to HITCH Electronic draft control - Static
description (H.10.D))
Tractors installed with the electronic draft control hydraulic lift assembly use a unique operator control panel.
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BAIL10CCM010AAB 3
BSE2884A 4
(1). Draft sensitivity control knob (2). Drop rate control knob
(3). Height limit control knob (4). Slip limit control knob
BRL6436B 5
(1). Wheel slip control knob (2). EHR Function control knob
(3).Front hitch height limit control knob (4). Drop rate control knob
(5). Draft sensitivity control knob (6). Rear hitch height limit control knob
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BAIL07APH331ASA 6
(1). Stop adjuster thumbwheel (2). Position control lever
(3). Draft loading wheel (4). Raise/lower switch
BRK5798B 7
The raise and lowering functions of the electronic draft control lift system can also be operated from the rear fender
switches (1) and (2)
BSE3774A 8
Mechanical remote control valves (1) are also available with electronic draft control. (2). Mechanical remotes are also
available with a combination configurable and non configurable valve slices . See Table 1
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BSF3967A_430 9
Located below the Electronic Draft Control valve (Where fitted), is the Hydraulic Power Tapping port (Power Beyond)
block.This includes a priority valve and also a low pressure regulating valve (1). This block also has a flange plate
which allows the addition of a trailer brake valve.
BSE3845A 10
1. Power Beyond Ports 2. Pressure Relief Valve
NOTE: Semi Powershift transmission tractors have two shift buttons plus an extra range button on the reverse side
of the handle.
CLOSED CENTRE LOAD SENSING HIGH PRESSURE HYDRAULIC CIRCUIT
The principal of operation of the closed centre load sensing high pressure hydraulic circuit with variable flow piston
pump is to supply oil flow on demand. It also enables simultaneous operation of the trailer brakes, hydraulic lift,
remote control valve assemblies and front axle suspension where fitted. The load sensing variable flow piston pump
offers significant benefits in reducing the engine power loss that occurs in open centre systems where a high volume
of oil, often far in excess of demand, is continuously pumped round the hydraulic circuit even when they are not being
operated.
A fixed displacement pump (Charge Pump) serves as an initial displacement pump for the variable displacement pump
. The variable displacement pump first of all supplies oil to the trailer brake valve (where fitted), the remote valves
and electronic draft control valve and a pilot oil supply with lower priority. The highest load pressure is indicated to
the flow and compensating valve on the pump via the load sensing line. The flow and compensator valve controls
the pump pressure in such a way that it always exceeds the highest load pressure by a pre-set difference. A priority
valve for low pressure circuit demand is located in the bottom subplate of the remote valve stack. Tractors fitted with
Electro-hydraulic remote valves also have high pressure oil supplied from the variable displacement pump to the top
plate of the remote valve stack. The oil passes through the top plate via a small filter and a pressure limiting valve (
20 - 22 Bar). The oil is then directed to the pilot oil supply of the electro-hydraulic control valve.
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BAIL07APH330GSA 11
1. High Pressure Feed to Electro-Hydraulic Valve Pilot
Line
2. Electro-Hydraulic Remote Valves
3. Electronic Draft Control Valve 4. Trailer Brake Valve (Where Fitted)
5. Low Pressure Feed 6. Load Sensing Line
7. Lubrication Manifold 8. Low Pressure Feed to 50 km/h 19th Gear Clutch
Manifold
9. Variable Displacement Pump 10. Flow and Pressure Compensator Valve
11. High Pressure Feed to Electro-Hydraulic Remote
Valves
12. Return line from Hydraulic Lift Cylinder
13. Feed to trailer brake Coupler
The main filter (1) and the charge filter (2) Figure 12 are installed on tractors with variable displacement pump (CCLS
system).
1. Main Intake (Suction) Filter
2. Charge Filter
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BAIS06CCM055AVA 12
Two valves are located within the filter assembly cap. These are (1) the 0.8 bar (11.600 psi) supplementary lube
valve and the 3 bar (43.500 psi) charge pressure bypass valve (2).
BRJ5174B 13
High Pressure Hydraulic System, Variable Displacement Pump (CCLS) - Electrical Switches
1. Low Charge Pressure Warning Switch
2. Intake Filter restriction (vacuum) Switch
3. Low Oil Temperature Switch
BAIL07APH325ASA 14
Mid-Mount Remote Valves.
Optional additional remote valves are mounted under the cab. Connected into the high pressure oil line supplied from
the hydraulic pump after the trailer brake valve and operated via a joystick control in the cab. (Refer to Mid-mount
remote control valve - Static description (A.10.C))
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BAIL06CCM088ASA 15
Suspended front axle control valve (where fitted)
The suspension control valve is located on the right hand side of the tractor. High pressure oil is fed from the power
beyond port on the sub plate of the remote valve stack and with the use of processor controlled PWM valves controls
the flow of oil to the suspension cylinder (Refer to SUSPENSION Hydraulic - Static description (D.40.C))
BAIL10CVT051AAB 16
Front Axle Suspension Cylinder
BSE3769A 17
Steering Motor
There are two types of steering motors fitted depending on whether the tractor is with or less Supersteer. The with
Supersteer models are of a Dynamic load sensing type with a variable displacement, depending on the speed the
steering wheel is rotated. The less Supersteer models use a fixed displacement motor. Also fitted as an option on
some models is a Fast Steer valve (1) which is coupled to the steering motor (2) .
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BAIL07APH352ASA 18
Steering Cylinders.
Receives high pressure oil directly from the steering motor.
BSE2868B 19
Load Sensing Shuttle Valve.
Located in each remote valve slice, the Electronic Draft Control valve and between the trailer brake valve, front sus-
pension valve and mid-mounted valves, where fitted, is the load sensing shuttle valve (2) Figure 20. This allows the
function with the highest pressure demand to send sensing pressure to the load sensing valve, Figure 21, on the
variable displacement pump.
BSB0388A_436 20
1. Load Sensing Line
2. Pressure Compensator Valve
3. Flow Compensating Valve
4. Valve Body
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BAIL07APH326ASA 21
Operation of the closed centre high pressure hydraulic circuit is as follows:-
The components in the high pressure hydraulic circuit are connected by their load sensing lines to the hydraulic load
sensing valve which controls the output of the hydraulic pump.
When the trailer brakes, remote control valves, hydraulic lift or front axle suspension (where fitted) are operating, the
load sensing valve on variable flow piston pump, compares the pressure in the component load sense line with the
output pressure of the hydraulic pump.
If pump output pressure is less than the combined pressure of the load sense line and spring force of the flow con-
trol valve, then pump output continues to increase. When circuit demand is satisfied pump pressure overcomes the
combined pressure of the load sense line and flow compensating valve spring. This moves the spool in the flow com-
pensating valve to the right, allowing control pressure oil to be directed to the variable flow swash plate servo piston,
which de-strokes the pump to adjust output to circuit demand.
High Pressure oil is fed to a subplate at the bottom of the remote valve stack where it is directed to the Trailer Brake
valve which has priority for safety reasons. The oil is then redirected to the Electronic Draft Control Valve and the
Electro-Hydraulic Remote Valves. Within the subplate is a pressure compensating valve which diverts the oil to the
low pressure system at a pressure of 18 bar (261.00 psi).
High Pressure oil is also fed to the top of the Remote Valve stack through an end plate which incorporates a pressure
limiting valve and this supplies oil at 20 - 22 bar to the pilot line galleries in the Electro-Hydraulic Remote Valves.
Surplus oil from the charge pump to the variable displacement pump is fed past the 0.8 bar valve and boosts the
pressure in the lubrication circuit.
The trailer brake valve is located on the sub plate of the remote valve stack. The valve diverts oil pressure to the
trailer brakes whenever the brake pedals are depressed.
The trailer brake has absolute priority over other services in the circuit.
BAIL07APH327ASA 22
The remote valves are available as two, three or four valves per tractor.
The valves can be double-acting with float and kick out.
Double acting convertible to single-acting with float.
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Double acting convertible to single-acting.
BSE3664A_442 23
BAIL07APH328ASA 24
When the oil is cold and pressure differential across the oil cooler is higher than 6 bar ( 87 lbf/in2) the cooler by-pass
valve (1) located in the transmission top cover will operate to ensure that adequate flow to the lubrication circuit is
maintained. This feature of diverting oil from the cooler assists in aiding a rapid warm up of oil in cold weather con-
ditions.
The steering pump / steering return oil is directed through the oil cooler at the front of the tractor and is limited to a
maximum pressure of 5.59 bar (81.06 psi)) by the lubrication relief valve located in the transmission top cover.
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PRIMARY HYDRAULIC POWER SYSTEM - Static description
The hydraulic systems can be separated into the following circuits :-
High Pressure Circuit
Hydraulic Lift Assembly.
Remote Control Valves.
Trailer Brake (Where Fitted)
Suspended Front Axle.
Front Lift (Where fitted).
Steering Circuit
Steering Motor and Cylinders
Low Pressure Circuit
Independent Power Take Off (PTO).
Differential Lock
Front Wheel Drive engagement
Transmission clutch and synchroniser engagement
Creeper engagement (Where fitted)
Front PTO (Where fitted)
50 kph engagement (Where fitted)
Hydrostatic Unit
Lubrication Circuit
PTO Clutch Plates
Transmission Clutch Plates.
Transmission Shaft Pressure Lube
Pump Drive Gear Bearing.
Hydraulic Lift Cross Shaft
Hydraulic Pump/ HPL/ Remote Valve Options
Less Hydraulic Trailer Brakes With Hydraulic Trailer Brakes Hydraulic Trailer Brake Italy
Variable Displacement Pump.
Electronic Draft Control valve (EDC valve)
Mechanical Remote
Valves
Electro-Hydraulic
Remote Valves
3, 4 or 5 Electro hydraulically operated valves
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Transmission Hydraulic CVT
Table 1
BAIL10CVT067GAB 1
Main hydraulic components
1.Hydraulic lift cylinder 2.Hydraulic remote valves
3.Electronic draft control valve 4.Distribution manifold
5.High pressure feed pipe 6.Hydrostat control valve
7.Gear pump 8.Main suction filter
9.Variable displacement pump 10.Trailer brake valve
The high pressure circuit is of the `Closed Centre Load Sensing' design on all tractor model options fed by a Variable
Displacement Pump.
Figure 2 shows the variable displacement pump (1) and suction filter assembly (2).
When the oil is cold and pressure differential across the oil cooler is higher than 5 °C (41.0 °F) the cooler by-pass
valve located in the charge pump will operate to ensure that adequate flow to the lubrication circuit is maintained. This
feature of diverting oil from the cooler assists in aiding a rapid warm up of oil in cold weather conditions.
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BAIL10CVT037AAB 2
The gear pump (1) Figure 3 supplies low pressure and lubrication oil.
BAIL10CVT066AAB 3
Located on the right hand side of the rear axle housing is a resounding filter assembly.
BAIL10CVT039AAB 4
The priority valve (1) located on the top of the main pump diverts high pressure oil to the steering, the trailer brake
valve (where fitted) (2) and high pressure circuit. (Refer to Priority valve - Dynamic description (A.14.A))
BAIL10CVT041AAB 5
Closed centre remote valves .
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There are two types of remote valves available for the closed centre system. Mechanical remote valves operated
via a cable from within the cab or electro hydraulically operated valves, (1) Figure 6, which are operated by electrical
switches and have their own in built processor to control oil flow via a solenoid valve.
BAIL10CVT038AAB 6
Mechanical remote control valves (1) are also available with electronic draft control. (2). Mechanical remotes are also
available with a combination configurable and non configurable valve slices . See Table 1
BRE1744B 7
The hydraulic lift Electronic Draft Control valve (EDC valve) is a stack type proportional solenoid operated valve (1)
mounted with the remote control valves at the rear of the tractor. (Refer to HITCH Electronic draft control - Static
description (H.10.D)
BAIL10CCM010AAB 8
Tractors installed with the electronic draft control hydraulic lift assembly use a unique operator control panel.
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BRL6436B 9
(1). Wheel slip control knob (2). EHR Function control knob
(3).Front hitch height limit control knob (4). Drop rate control knob
(5). Draft sensitivity control knob (6). Rear hitch height limit control knob
BAIL07APH331ASA 10
(1). Stop adjuster thumbwheel (2). Position control lever
(3). Draft loading wheel (4). Raise/lower switch
BRE1481B 11
switch (1)
switch (1)
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BRK5798B 12
switches (1) and (2)
BSF3967A_430 13
Located below the Electronic Draft Control valve (Where fitted), is the Hydraulic Power Tapping port (Power Beyond)
block. This includes a priority valve and also a low pressure regulating valve (1).
BSE3845A 14
1. Power Beyond Ports 2. Pressure Relief Valve
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BAIL10CVT065AAB 15
Power beyond slice with ISO standard couplers
BAIL10CVT061AAB 16
Power beyond hydraulic return port (1)
The Power beyond hydraulic return port is used to reduce back pressure in the remote hydraulic return line and create
more efficient motor operation. The motor return circuit is also used where a return circuit with low back pressure is
desired for improved implement operation
BAIL10CVT051AAB 17
Suspension valve (1) Refer to SUSPENSION Hydraulic - Static description (D.40.C)
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