Telescopic Handler Service Manual Sections

WEBM008500
WH613-1E0WH609-1E0
WH713-1E0 WH714H-1E0
WH716-1E0
WH609-1E0 395F61003 and up
WH613-1E0 395F61003 and up
WH713-1E0 395F71003 and up
WH714H-1E0 395F71003 and up
WH716-1E0 395F71003 and up
TELESCOPIC HANDLER
MODEL SERIAL NUMBER

WH6-1E0 WH7-1E0 00-1
CONTENTS
CONTENTS
Page
10. STRUCTURE AND FUNCTION ...................................................................................... 10-1
20. TESTING AND ADJUSTING ........................................................................................... 20-1
30. DISASSEMBLY AND ASSEMBLY................................................................................. 30-1

WH6-1E0 WH7-1E0 00-5
k SAFETY
kIMPORTANT SAFETY NOTICE
Proper service and repair is extremely important for the safe operation of your machine.
The service and repair techniques recommended by Komatsu Utility and describe in this manual are both ef-
fective and safe methods of operation. Some of these operations require the use of tools specially designed
by Komatsu Utility for the purpose.
To prevent injury to workers, the symbol k is used to mark safety precautions in this manual. The cautions
accompanyingthesesymbolsshouldalwaysbecarefullyfollowed.Ifanydangerarisesormaypossiblyarise,
first consider safety, and take necessary steps to face.
GENERAL PRECAUTIONS
Mistakes in operation extremely dangerous.
Read all the Operation and Maintenance Manual carefully
BEFORE operating the machine.
1. Before carrying out any greasing or repairs, read all
the precautions written on the decals which are suck
on the machine.
2. When carrying out any operation, always wear safety
shoes and helmet. Do not wear loose work clothes, or
clothes with buttons missing.
• Always wear safety glasses when hitting parts
with a hammer.
• Always wear safety glasses when grinding parts
with a grinder, etc.
3. If welding repairs are needed, always have a trained,
experienced weldercarryout thework. When carrying
out welding work, always wear welding gloves, apron,
glasses, cap and other clothes suited for welding
work.
4. When carrying out any operation with two or more
workers,alwaysagreeontheoperatingprocedurebe-
fore starting. Always inform your fellow workers be-
fore starting any step of the operation. Before starting
work, hang UNDER REPAIR signs on the controls in
the operator’s compartment.
5. Keep all tools in good condition and learn the correct
way to use them.
6. Decide a place in the repair workshop to keep tools
and removed parts. Always keep the tools and parts in
their correct places. Always keep the work area clean
and make sure that there is no dirt or oil on the floor.
Smoke only in the areas provided for smoking. Never
smoke while working.
PREPARATIONS FOR WORK
7. Before adding or making any repairs, park the ma-
chine on hard, level ground, and block the wheels to
prevent the machine from moving.
8. Before starting work, lower outrigger, bucket or any
other work equipment to the ground. If this is not pos-
sible, use blocks to prevent the work equipment from
falling down. In addition, be sure to lock all the control
levers and hang warning sign on them.
9. When disassembling or assembling, support the ma-
chine with blocks, jacks or stands before starting
work.
10. Remove all mud and oil from the steps or other places
used to get on and off the machine. Always use the
handrails, ladders or steps when getting on or off the
machine.
Never jump on or off the machine.
If itis impossible touse thehandrails,ladders or steps,
use a stand to provide safe footing.
PRECAUTIONS DURING WORK
11. When removing the oil filler cap, drain plug or hydrau-
lic pressure measuring plugs, loosen them slowly to
prevent the oil from spurting out.
Before disconnecting or removing components of the
hydraulic circuit and engine cooling circuit, first re-
move the pressure completely from the circuit.
12. The water and oil in the circuits are not hot when the
engine in stopped, so be careful not to get burned.
Wait for the oil water to cool before carrying out any
work on the cooling water circuits.
13. Before starting work, remove the leads from the bat-
tery. Always remove the lead from the negative ( – )
terminal first.
kSAFETY

WH6-1E0 WH7-1E000-6
k SAFETY
14. When raising heavy components, use a hoist or
crane. Check that the wire rope, chains and hooks
are free from damage.
Always use lifting equipment which has ample ca-
pacity. Install the lifting equipment at the correct
places.
Use a hoist or crane and operate slowly to prevent
the component from hitting any other part.
Do not work with any part still raised by the hoist or
crane.
15. When removing covers which are under internal
pressure or under pressure from a spring, always
leave two bolts in position on opposite sides. Slowly
release the pressure, then slowly loosen the bolts to
remove.
16. When removing components, be careful not to
break or damage the wiring.
Damage wiring may cause electrical fires.
17. When removing piping, stop the fuel or oil from spill-
ing out. If any fuel or oil drips on to the floor, wipe it up
immediately.
Fuel or oil on the floor can cause you to slip, or can
even start fires.
18. As a general rule, do not use gasoline to wash parts.
Inparticular,use onlytheminimumof gasolinewhen
washing electrical parts.
19. Be sure to assemble all parts again in their original
places. Replace any damage parts with new parts.
When installing hoses and wires, be sure that they
will not be damaged by contact with other parts
when the machine is being operated.
20. When installing high pressure hoses, make sure
that they are not twisted. Damaged tubes are dan-
gerous, so be extremely careful when installing
tubes for high pressure circuits. Also, check that
connecting parts are correctly tightened.
21. When assembling or installing parts, always use
specified tightening torques.
When installing the parts which vibrate violently or
rotate at high speed, be particulary careful to check
that they are correctly installed.
22. Whenaligning twoholes, never insertyourfingers or
hand.
23. When measuring hydraulic pressure, check that the
measuring tool is correctly assembled before taking
any measurement.
24. Take sure when removing or installing wheels.

WH6-1E0 WH7-1E0 00-7
FOREWORD
FOREWORD
This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator an accurate
understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure
you understand the contents of this manual and use it to full effect at every opportunity.
This shop manual mainly contains the necessary technical information for operations performed in a service work-
shop.
The manual is divided into chapters on each main group of components; these chapters are further divided into the
following sections.
STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an understanding
of the structure, but also serves as reference material for troubleshooting.
TESTING AND ADJUSTING
This sections explains checks to be made before and after performing repairs, as well as adjustments to be
made at completion of the checks and repairs.
Troubleshooting charts correlating «Problems» to «Causes» are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each
component, as well as precautions to be taken for these operations.
NOTE
The specifications contained in this shop manual are subject to change at any time and without any no-
tice.
Contact your Komatsu Utility distributor for the latest information.

WH6-1E0 WH7-1E000-8
HOW TO READ THE SHOP MANUAL
HOW TO READ THE SHOP MANUAL
VOLUMES
Shop manual are issued as a guide to carry out repairs.
These various volumes are designed to avoid duplicat-
ing the same information.
DISTRIBUTION AND UPDATING
Any additions, amendments or other changes will be
sent to Komatsu Utility distributors.
Get the most up-to-date information before you start any
work.
FILING METHOD
1. See the page number on the bottom of the page.
File the pages in correct order.
2. Following examples show you how to read the page
number.
Example:
3. Additional pages: additional pages are indicated by
a hyphen (–) and number after the page number.
Fle as in the example.
Example:
REVISED EDITION MARK
When a manual is revised, an edition mark is recorded
on the bottom outside corner of the pages.
REVISIONS
Revised pages are shown on the LIST OF REVISED
PAGES between the title page and SAFETY page.
SYMBOLS
In order to make the shop manual greatly chelpful, im-
portant points about safety and quality are marked with
the following symbols.
10 3
Item number (10. Structure and
Function)
Consecutive page number for each
item
-
10-4
10-4-1
10-4-2
10-5
Added pages
Symbol Item Remarks
k Safety
Special safety precautions
are necessary when
performing the work.
Extra special safety precautions
are necessary when performing
the work because it is under in-
ternal pressure.
a Caution
Special technical precautions or
other precautions for preserving
standards are necessary when
performing the work.
4 Weight
Weight of parts or systems.
Caution necessary when select-
ing hoisting wire, or when work-
ing posture is important, etc.
3 Tightening
torque
Parts that require special atten-
tion for the tightening torque dur-
ing assembly.
2 Coat
Parts to be coated with adhe-
sives and lubricants etc.
5 Oil, water
Places where oil, water or fuel
must be added, and their quan-
tity.
6 Drain
Places where oil or water must
be drained, and quantity to be
drained.

REMOVAL AND INSTALLATION
WH6-1E0 WH7-1E0 30-15
ENGINE HOOD
ENGINE HOOD
Removal
1 -Lift the engine hood (1).
RKTA8480
1
2 -While supporting the engine hood, loosen and remove
the screws (2) retaining the hinges (3).
RKTA0340
3
2
3 -Loosen and remove the self locking nut (4), the backing
washer and the screw (5) to disconnect the gas damper
(6) from its support (7).
RKTA8491
4
5
6
7
4 -Lower the hood and place an anti-slip block (A) between
lower edge of hood and body; then, strap the hood and
connect it a hoist.
5 -Remove the hood (1). [*1]
RKTA8500
A

WH6-1E0 WH7-1E030-16
ENGINE HOOD
Installation
• To install, reverse the removal procedure.
[*1]
1 -Adjust the position of the hood, ensuring that the lock
assembly (8) is centred in relation to the retaining hook
(9).
RKTA8530
8
9
2 -Adjust the hinges vertically (3) to allow the closure
sealing strip (10) to evenly rest along the length of the
hood.
RKTA8540
3
10
3 -Adjust the hinges (3) horizontally until full contact
between the sealing strip (11) and the engine-
transmission mount (12) is achieved.
RKTA8550
3
11
12

WH6-1E0 WH7-1E0 30-17
RADIATOR HOOD
RADIATOR HOOD
Removal
1 -Loosen the nut (1), raise the hood and hold it securely in
position with the hood rod (2).
RKTA8510
1
2
2 -While supporting the hood (3), loosen and remove the
screws (4) retaining the hinge (5).
3 -Disengage the rod (6) and remove the hood (3).
RKTA8520
3
4
5
2
Installation

WH6-1E0 WH7-1E030-18
AIR FILTER
AIR FILTER
Removal
1 -Unscrew and removethe cap(1)from the surgetank (2).
2 -Loosen and remove the screws (3), remove the surge
tank (2), and position the tank aside.
RKTA0400
1
3 2
3
3 -Loosen the clamps (4), (5) and disconnect the outside
airinlethose(7)andengineintakehose(8)fromthefilter
(6).
RKTA0410
4
5
6
7
8
4 -Disconnect the air cleaner clogging sensor connector
(9).
RKTA0420
9
5 -Loosen and remove the screws (10) together with
washers and nuts and remove the filter (6).
Installation
RKTA0430
10
6

WH6-1E0 WH7-1E0 30-19
TURBOCOMPRESSOR
TURBOCOMPRESSOR
Removal
1 -Remove the engine hood.
(For details, see "ENGINE HOOD").
RKTA8501
2 -Disconnect the outside air inlet hose (2) from the air
cleaner (1).
3 -Remove the hose (3) connecting to the filter or
turbocompressor.
RKTA8560
1
2
3
4 -Disconnect the hose (4) from the oil vapour bleed valve
(5) and remove the air cleaner-to-turbocompressor
hose (6) and the clamp (7).
RKTA8492
4
5
6
7
5 -Loosen the clamps (8) and remove the hose (9).
RKTA8570
8
9
8

WH6-1E0 WH7-1E030-20
TURBOCOMPRESSOR
6 -Loosen and remove the three screws (10) and remove
the support (11).
RKTA8580
10
11
7 -Loosen and remove the screws (12) retaining the
exhaust pipe (13).
RKTA0472
12
13
8 -Disconnect the exhaust pipe (13) and recover the
gasket (14).
RKTA0481
13
14
9 -Remove the turbocompressor following the instructions
given in the engine workshop manual (code
WEBMNEF001).
Installation

WH6-1E0 WH7-1E0 30-21
EXHAUST PIPE
EXHAUST PIPE
Removal
• 1st Length
1 -Loosen and remove the screws (1) securing the pipe (2)
to the turbocompressor (3) (models with turbo engine),
or to the exhaust manifold (models with aspirated
engine).
a Models with aspirated engine:
replace the gasket between exhaust pipe and
manifold at each disassembly.
RKTA0471
2
1
3
2 -Loosen and remove the screws (4) together with their
respective washers, and remove the pipe (2).
a Replace the gasket between exhaust pipe and
muffler at each disassembly.
3 -Remove the pipe (2).
RKTA0490
4
2
4
• 2nd Length
1 -Loosen and remove the screws (5) and remove the tail
pipe (6). [*1]
RKTA0500
6
5
2 -Loosen and remove the screws (7) securing the 2nd
length of the pipe (8) to the muffler (9).
a Replace the gasket between exhaust pipe and
muffler at each disassembly.
RKTA0510
7
8
9

WH6-1E0 WH7-1E030-22
EXHAUST PIPE
3 -Loosen the screw (10) remove the retaining screw (11),
and remove the clamp (12).
4 -Remove the pipe (8).
RKTA0520
8
10
11
12
Installation
[*1]
a Before locking the tail pipe (6), adjust it until it is
centred in relation to the 2nd length of the exhaust.

WH6-1E0 WH7-1E0 30-23
BELT, FAN
BELT, FAN
Removal
1 -Remove the air intake hose (1).
RKTA8590
1
2 -Disconnect the coolant liquid outlet (2) hose (3)
connecting to the expansion tank from the cap.
3 -Remove the screw (4) and remove the clamp (5) that
supports the hose (3). Slide the hose (3) out towards the
engine compartment.
RKTA8600
3
4
52
3
4 -Remove the fan cover (6).
RKTA8610
6
5 -Loosen the screw (7) retaining the tensioner (8).
6 -Loosen the nut (9) and rotate the screw (10) to loosen
the belt. [*1]
RKTA8620
910
87

WH6-1E0 WH7-1E030-24
BELT, FAN
7 -Loosen the compressor retaining screws (11).
8 -Disengage the belt (12) from the pulley (13).
RKTA8630
12
13
14
11
11
9 -Support the compressor (14) and simultaneously
disconnect the connector (15) and remove the fitting
screws (16).
RKTA8640
16
16
15
16
10 -Position the compressor (14) to the side and remove the
drive belt following the instructions in the engine
workshop manual (code WEBMNEF001).
a Slide the belt out through the openings between the
fan blades.
RKTA8650
14
Installation
[*1]
a Tension the belt.
(For details, see "20 TESTING AND
ADJUSTMENTS").

WH6-1E0 WH7-1E0 30-25
RADIATOR-EXCHANGER ASSEMBLY
Removal
1 -Unscrew the cap (1) and drain the coolant liquid. [*1]
6 Coolant liquid: 20 l approx.
RKTA8660
1
2 -Remove the radiators hood.
(For details, see "RADIATOR HOOD").
3 -Disconnect the hose (3) connecting to the expansion
tank from the radiator cap (2). Remove the screw (4);
remove the hose clamp (5), and slide the hose (3) out.
RKTA8601
3
4
5
2
3
4 -Disconnect the hose (6) from the radiator-intercooler
assembly and remove the hose.
5 -Remove the air inlet hose (7) and disconnect the
turbocompressor feed hose (8).
RKTA8670
8
6
7
6 -Remove the retaining screws and remove the fan guard
(9).
RKTA8611
9

WH6-1E0 WH7-1E030-26
7 -Disconnect the coolant liquid inlet hose (10) from the
radiator.
RKTA0581
10
8 -Disconnect the coolant liquid outlet hose (12) from the
radiator (11).
RKTA0592
11
12
9 -Disconnect the transmission oil inlet and outlet hoses
(13) from the exchanger. [*2]
a Mark the hoses to avoid mixing them up during
installation.
a Immediately cap the hoses and plug the holes to
prevent contaminants from entering the passages.
RKTA0601
13
10 -Loosen the screws (14), (15); remove the screws (14)
and disengage the radiator (10) from the brackets (16).
RKTA8680
16
10
15
14

WH6-1E0 WH7-1E0 30-27
11 -Loosen and remove the lower nuts (17) retaining the
anti-vibration supports (18).
RKTA0554
17
18
12 -Remove four screws (19) retaining the fan shroud and
the middle screw (20) retaining the radiator assembly.
RKTA8690
19
20
13 -Shift the fan shroud towards the engine.
14 -Tilt the radiator towards the rear of the vehicle until the
hose sleeves become disconnected from the fan
shroud.
15 -Connect the complete assembly to a hoist and remove it
from the machine.
4 Assembly: 36 kg approx.
RKTA8700
Installation
[*1]
a Carry out the coolant liquid filling procedure.
[*2]
a Top up the transmission oil.

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WH6-1E0 WH7-1E030-28
INTERCOOLER
INTERCOOLER
Removal
1 -Unscrew the cap (1) and drain the coolant liquid. [*1]
RKTA8660
1
2 -Remove the radiators hood.
(For details, see "RADIATOR HOOD").
3 -Disconnect the hose (3) connecting to the expansion
tank from the radiator cap (2). Remove the screw (4);
remove the hose clamp (5), and slide the hose (3) out.
RKTA8600
3
4
52
3
4 -Disconnect the hose (6) from the radiator-intercooler
assembly and remove the hose.
5 -Remove the air inlet hose (7) and disconnect the
turbocompressor feed hose (8).
RKTA8670
8
6
7
6 -Remove the retaining screws and remove the fan guard
(9).
RKTA8611
9

WH6-1E0 WH7-1E0 30-29
INTERCOOLER
7 -Disconnect the coolant liquid inlet hose (10) from the
radiator.
RKTA0581
10
8 -Disconnect the coolant liquid outlet hose (12) from the
radiator (11).
RKTA0592
11
12
9 -Disconnect the transmission oil inlet and outlet hoses
(13) from the exchanger. [*2]
a Mark the hoses to avoid mixing them up during
installation.
a Immediately cap the hoses and plug the holes to
prevent contaminants from entering the passages.
RKTA0601
13
10 -Loosen and remove the screws (14) retaining the fan.
RKTA8710
14

WH6-1E0 WH7-1E030-30
INTERCOOLER
11 -Remove four screws (15) retaining the fan shroud and
the middle screw (16) retaining the radiator assembly.
RKTA8691
16
15
12 -Shift the fan shroud (17) towards the engine and pull out
the fan (18).
RKTA8720
17
18
13 -Remove the rear retaining screws (20).
14 -Remove the intercooler (20).
Installation
[*1]
a Carry out the coolant liquid filling procedure.
[*2]
a Check the transmission oil level.
RKTA8740
19
RKTA8750
20

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