service repair manual instant download

1. Shop Manual
MACHINE MODEL SERIAL NUMBER
PW140-7 H55051 AND UP
VEBM410101
• This shop manual may contain attachments and optional equipment that are not available in your area.
Please consult your local Komatsu distributor for those items you may require.
• Materials and specifications are subject to change without notice.
• PW140-7 mount the SAA4D107E-1 engine.
• For details of the engine, see the 107 Series Engine Shop Manual.
© 2009
All Rights Reserved
Printed in Europe 2009-08
1

2. PW140-7 VEBM410101
CONTENTS
00 FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-1
01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
10 STRUCTURE, FUNCTION AND MAINTENANCE
STANDARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
20 TESTING AND ADJUSTING. . . . . . . . . . . . . . . . . . . . . . . . 20-1
20 TESTING AND ADJUSTING. . . . . . . . . . . . . . . . . . . . . . 20-101
20 TESTING AND ADJUSTING
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-201
20 TESTING AND ADJUSTING
Troubleshooting when failure code is indicated . . . . 20-301
20 TESTING AND ADJUSTING
Troubleshooting of electrical system (E-Mode) . . . . . 20-501
20 TESTING AND ADJUSTING
Troubleshooting of electrical system
(Error Checking of items without Monitor codes) . . . 20-601
20 TESTING AND ADJUSTING
Troubleshooting of hydraulic and mechanical system
(H-Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-701
30 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . 30-1
90 OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1
No. of page
TOC-1

3. PW140-7 VEBM410101
FOREWORD
Safety
Important safety notice
Proper service and repair is extremely important for
the safe operation of your machine. The service and
repair techniques recommended and described in
this manual are both effective and safe methods of
operation. Some of these operations require the use
of tools specially designed for the purpose.
To prevent injury to workers, the symbol is used
to mark safety precautions in this manual. The cau-
tions accompanying these symbols should always be
followed carefully. If any dangerous situation arises
or may possibly arise, first consider safety, and take
the necessary actions to deal with the situation.
General precautions
Mistakes in operation are extremely dangerous.
Read the OPERATION & MAINTENANCE MANUAL
carefully BEFORE operating the machine.
1. Before carrying out any greasing or repairs, read
all the precautions given on the decals which are
fixed to 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 welder carry out the work.
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, always agree on the operating
procedure before starting. Always inform your
fellow workers before starting any step of the op-
eration. Before starting work, hang UNDER RE-
PAIR 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 work-
ing.
Preparations for work
1. Before adding oil or making repairs, park the ma-
chine on hard, level ground, and block the
wheels or tracks to prevent the machine from
moving.
2. Before starting work, lower blade, ripper, bucket
or any other work equipment to the ground. If this
is not possible, insert the safety pin or use blocks
to prevent the work equipment from falling. In ad-
dition, be sure to lock all the control levers and
hang warning signs on them.
3. When disassembling or assembling, support the
machine with blocks, jacks or stands before
starting work.
4. Remove all mud and oil from the steps or other
places used to get on and off the machine. Al-
ways use the handrails, ladders or steps when
getting on or off the machine. Never jump on or
off the machine. If it is impossible to use the
handrails, ladders or steps, use a stand to pro-
vide safe footing.
00
00-1

4. Safety FOREWORD
PW140-7 VEBM410101
Precautions during work
1. When removing the oil filler cap, drain plug or hy-
draulic pressure measuring plugs, loosen them
slowly to prevent the oil from spurting out. Before
disconnecting or removing components of the oil,
water or air circuits, first remove the pressure
completely from the circuit.
2. The water and oil in the circuits are hot when the
engine is stopped, so be careful not to get
burned. Wait for the oil and water to cool before
carrying out any work on the oil or water circuits.
3. Before starting work, remove the leads from the
battery. ALWAYS remove the lead from the nega-
tive (-) terminal first.
4. 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 capacity. 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.
5. 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.
6. When removing components, be careful not to
break or damage the wiring, Damaged wiring
may cause electrical fires.
7. When removing piping, stop the fuel or oil from
spilling 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.
8. As a general rule, do not use gasoline to wash
parts. In particular, use only the minimum of
gasoline when washing electrical parts.
9. Be sure to assemble all parts again in their origi-
nal places. Replace any damaged part 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 oper-
ated.
10. When installing high pressure hoses, make sure
that they are not twisted. Damaged tubes are
dangerous, so be extremely careful when install-
ing tubes for high pressure circuits. Also check
that connecting parts are correctly installed.
11. When assembling or installing parts, always use
the specified tightening torques. When installing
protective parts such as guards, or parts which
vibrate violently or rotate at high speed, be par-
ticularly careful to check that they are installed
correctly.
12. When aligning two holes, never insert your fin-
gers or hand. Be careful not to get your fingers
caught in a hole.
13. When measuring hydraulic pressure, check that
the measuring tool is correctly assembled before
taking any measurements.
14. Take care when removing or installing the tracks
of track-type machines. When removing the
track, the track separates suddenly, so never let
anyone stand at either end of the track.
00-2

5. DISASSEMBLY AND ASSEMBLY Precautions when performing operation
PW140-7 VEBM410101
Precautions when performing operation
A. Hoses and tubes using sleeve nuts
B. Split flange type hoses and tubes
C. If the part is not under hydraulic pressure, the following corks can be used:
Be sure to follow the general precautions given be-
low when performing removal or installation (disas-
sembly or assembly) of units.
1. Precautions when performing removal work
• If the engine coolant water contains antifreeze,
dispose of it correctly.
• After disconnecting hoses or tubes, cover them
or install blind plugs to prevent dirt or dust from
entering.
• When draining oil, prepare a container of ade-
quate size to catch the oil.
• Confirm the match marks showing the installa-
tion position, and make match marks in the nec-
essary places before removal to prevent any
mistake when assembling.
• To avoid loosening any wire contacts, do not pull
on the wires. In-order to prevent excessive force
to the wiring, hold onto the connectors when dis-
connecting them.
• Fasten tags to wires and hoses to identify and
show their installation position and help prevent
any mistakes when re-installing.
• Count and check the number and thickness of
the shims, and keep them in a safe place.
• When raising or lifting components, be sure to
use proper lifting equipment of ample strength
and safety.
• When using forcing screws to remove any com-
ponents, tighten the forcing screws uniformly in
turn.
• Before removing any unit, clean the surrounding
area and install a cover to prevent any dust or
dirt from entering after removal.
★ Precautions when handling piping during disas-
sembling
Fit the following blind plugs into the piping after
disconnecting it during disassembly operations.
Nominal number Plug (nut end) Sleeve nut (elbow end) Use the two items below as a set
02 07376-50210 07221-20210 (Nut), 07222-00210 (Plug)
03 07376-50315 07221-20315 (Nut), 07222-00312 (Plug)
04 07376-50422 07221-20422 (Nut), 07222-00414 (Plug)
05 07376-50522 07221-20522 (Nut), 07222-00515 (Plug)
06 07376-50628 07221-20628 (Nut), 07222-00616 (Plug)
10 07376-51034 07221-21034 (Nut), 07222-01018 (Plug)
12 07376-51234 07221-21234 (Nut), 07222-01219 (Plug)
Nominal number Flange (hose end) Sleeve head (tube end) Split flange
04 07379-00400 07378-10400 07371-30400
05 07379-00500 07378-10500 07371-30500
Nominal number Part Number
Dimensions
D d L
06 07049-00608 6 5 8
08 07049-00811 8 6.5 11
10 07049-01012 10 8.5 12
12 07049-01215 12 10 15
14 07049-01418 14 11.5 18
16 07049-01620 16 13.5 20
18 07049-01822 18 15 22
20 07049-02025 20 17 25
22 07049-02228 22 18.5 28
24 07049-02430 24 20 30
27 07049-02734 27 22.5 34
30-15

6. Precautions when performing operation DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
2. Precautions when carrying out installation
work
• Tighten all bolts and nuts (sleeve nuts) to the
specified (KES) torque.
• Install the hoses without twisting or interfer-
ence.
• Replace all gaskets, O-rings, cotter pins and
lock plates with new parts.
• Bend the cotter pin or lock plate securely.
• When coating with adhesive, clean the part
and remove all oil and grease, then coat the
threaded portion with two or three drops of
adhesive.
• When coating with gasket sealant, clean the
surface and remove all oil and grease, check
that there is no dirt or damage, then coat uni-
formly with gasket sealant.
• Clean all parts, and correct any damage,
dents, burrs or rust.
• Coat rotating parts and sliding parts with en-
gine oil.
• When press-fitting parts, coat the surface
with anti-friction compound (LM-P).
• After installing snap rings, check that the
snap ring is installed securely in the ring
groove.
• When connecting wiring connectors, clean
the connector to remove all oil, dirt or water
then connect securely.
• When using eye bolts, check that there is no
deformation or deterioration, screw them in
fully and align in the direction of the hook.
• When tightening split flanges, tighten uni-
formly in turn to prevent excessive tightening
on one side.
★ When operating the hydraulic cylinders for the
first time after reassembling cylinders, pumps
and other hydraulic equipment removed for re-
pair, bleed the air as follows:
1. Start the engine and run it at low idle.
2. Operate the work equipment control lever to op-
erate the hydraulic cylinders, 4 - 5 times, stop-
ping the cylinders 100 mm from the end of their
stroke.
3. Next operate the hydraulic cylinder 3 - 4 times to
the end of its stroke.
4. After doing this run the engine at normal speed.
★ When using the machine for the first time after
repair or long storage, follow the same proce-
dure.
3. Precautions when completing the operations
• If the engine coolant water has been
drained, tighten the drain valve and add
coolant water to the specified level. Run the
engine to circulate the coolant water through
the system. Then check the coolant water
level again.
• If the hydraulic equipment has been re-
moved and installed again, add hydraulic oil
to the specified level. Run the engine to cir-
culate the oil through the system. Then
check the hydraulic oil level again.
• If the piping or hydraulic equipment, have
been removed for repair, bleed the air from
the system after reassembling the parts.
• For details, see TESTING AND ADJUST-
ING, Bleeding air.Add the specified amount
of grease (molybdenum disulphide grease)
to the work equipment related parts.
30-16

7. DISASSEMBLY AND ASSEMBLY Removal and installation of fuel supply pump assembly
PW140-7 VEBM410101
Removal and installation of fuel supply pump assembly
Removal
Disconnect the cable from the negative (-) termi-
nal of the battery.
1. Close fuel stop valve (1) under the fuel tank.
2. Open the engine hood.
3. Disconnect clamp (3) of fuel hose (2) from brack-
et (4).
★ When loosening the bolt, fix the nut with
wrench so that the hose will not be twisted.
(If the hose is dragged and twisted, an ex-
cessive force is applied to the connector and
the inside of the connector may be broken.)
4. Remove clamp bracket (4).
5. Disconnect fuel return hose connector (5) con-
nected to the supply pump. [*1]
★ When removing a connector of quick coupler
type, observe the following points.
• Remove mud from each hose joint in ad-
vance (since the lock may be stuck in
the mud).
• Never use pliers or a screwdriver to dis-
connect the connector.
• Pull out lock (L) of each hose joint
straight (in direction [a]) while pressing it
from both sides.
(If the connector is disconnected forcibly
by twisting or bending it to the right and
left, its inside may be broken.)
• Put plugs in the adapters of the discon-
nected hoses to prevent fuel from flow-
ing out.
(Do not use wooden plugs since chips
may enter the fuel line.)
6. Disconnect fuel return hose (6).
7. Disconnect hose (7) connected to the fuel filter.
★ Before disconnecting hose (7), be sure to
perform steps 3 to 5.
8. Disconnect wiring connector (8).
9. Disconnect hose (9) connected to the prefilter.
[*2]
10. Disconnect hose (10) connected to the fuel filter.
1
30-17

8. Removal and installation of fuel supply pump assembly DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
11. Remove 2 high-pressure pipe bellows (11) from
common rail (12) and fuel supply pump (13). [*3]
12. Disconnect 2 high-pressure pipe clamps (14) be-
tween the common rail (12) and fuel supply
pump (13). [*4]
★ Since each clamps are divided two, take
care not to drop them in the end cover when
removing.
13. Disconnect high-pressure pipe (15) from fuel
supply pump (13). [*5]
★ Loosen the sleeve nut on the common
rail side in advance.
14. Remove the 3 fuel supply pump mounting nuts
and fuel supply pump assembly (7). (Locations of
nuts: [A]) [*6]
Installation
• Carry out installation in the reverse order to re-
moval.
[*1]
When installing a connector of quick coupler
type, observe the following points.
★ Replace the connector with new one in the
following cases.
1] The connector was removed with pliers or
a screwdriver or by bending it to the right and
left.
2] There is damage or deformation in the
connector.
★ Check that mud or dirt is not sticking to the
hose adapter in advance.
★ Press and insert the connector straight (in di-
rection [b]) without bending it to the right or
left.
(If it is difficult to insert the connector, do not
push it in forcibly but pull it out. Then, check
the convex and concave parts for abnormali-
ty and mud.)
[*2]
Joint bolt
19.6 - 29.4 Nm (2.0 - 3.0 kgm)
[*3]
★ Install each bellows with the slits out and down.
★ The bellows are installed so that fuel will not
spout over the hot parts of the engine and catch
fire when it leaks for some reason.
[*4]
Clamp mounting bolt:
24 ± 4 Nm {2.45 ± 0.41 kgm}
[*5]
★ Temporarily tighten the high-pressure pipe
sleeve nuts on the common rail side and fuel
supply pump side and then tighten them to the
specified torque in the order of the pump side
and common rail side.
Sleeve nut:
35 ± 3.5 Nm {3.6 ± 0.36 kgm}
[*6]
If too much grease is applied to an O-ring at as-
sembly, it will ooze out during operation.
Accordingly, do not apply grease too much. (Ap-
ply grease to the O-ring groove area of part A.)
30-18

9. DISASSEMBLY AND ASSEMBLY Removal and installation of fuel supply pump assembly
PW140-7 VEBM410101
When the supply pump mounting stud bolts of
the gear housing were removed, apply adhesive
to thier root side and mount them.
Stud bolt: Adhesive (LT-2)
Stud bolt:
12 ± 2 Nm {1.22 ± 0.2 kgm}
Fuel supply pump mounting nut
24 ± 4 Nm {2.45 ± 0.41 kgm}
30-19

10. Removal and installation of fuel injector assembly DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
Removal and installation of fuel injector assembly
Special tools
Removal
Disconnect the cable from the negative (-) termi-
nal of the battery.
1. Close fuel stop valve (1) under the fuel tank.
2. Remove blow-by duct (2) mounting bolts and dis-
connect blow-by duct (2). [*1]
3. Remove cylinder head cover mounting bolts (3)
and remove cylinder head cover (4). [*2]
4. Referring to Testing and adjusting, "Adjusting
valve clearance", set the No. 1 and 4 cylinders to
the top dead center.
5. Disconnect wiring (5).
6. Disconnect bracket (6).
7. Remove high-pressure pipe bellows (7) from the
cylinder head and common rail. [*3]
8. Remove high-pressure pipe (8). [*4]
9. Remove retaining nut (9) and then remove inlet
connector (10) .
★ Tool A3 is prepared for remove the inlet con-
nector (10).
★ Check that the inlet connector is free from
flaw and dirt.
10. Disconnect wiring (11).
★ Since different cylinders have different wiring
colors, record their combinations.
Symbol Part No. Part name
Necessity
Q'ty
New/Remodel
Sketch
A
1 795-799-6700 Puller 1
2 795-799-1131 Gear 1
3 795-799-8150 Remover 1
1
30-20

11. DISASSEMBLY AND ASSEMBLY Removal and installation of fuel injector assembly
PW140-7 VEBM410101
11. Loosen locknut (12) and then loosen adjustment
screw (13) thoroughly.
12. Remove rocker arm (14).
13. Remove crosshead (15).
★ Since the shapes of holes [a] and [b] of the
crosshead are different, record the installed
position of the crosshead.
14. Remove fuel injector assembly mounting bolt
(16).
15. Using tool A1, remove fuel injector assembly
(17).
★ Cover injector sleeve with cloth after remov-
ing fuel injector assembly for free from flaw
and dirt.
30-21

12. Removal and installation of fuel injector assembly DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
Installation
1. Fuel injector assembly
★ Check that fuel injector sleeve (18) is free
from flaw and dirt.
a. Fit O-ring (20) and gasket (21) to fuel injector
(19).
★ Replace O-ring and gasket with new
one.
b. Apply engine oil (EO15W-40) to the O-ring of
the fuel injector (19) and the mounting hole
on the head.
c. While setting the concave and convex (A),
install holder (22) to fuel injector (19).
d. Install fuel injector assembly (17) to the fuel
injector sleeve and tighten the mounting bolt
by 3 - 4 turns.
★ When installing the fuel injector assem-
bly, check the direction of the inlet con-
nector mounting hole.
e. Apply engine oil (EO15W-40) to O-ring (22)
of inlet connector (10) and the inlet connec-
tor mounting hole. While setting part of key
to the groove on the head, insert inlet con-
nector (10) to the end.
★ If the injector was replaced with new
one, replace the inlet connector with new
one, too.
★ Check of inlet connector
Check the inlet connector for the follow-
ing defects. If any defect is detected, re-
place the inlet connector.
• Burrs and deformation of inlet and outlet
of connector
• Clogging and dirt of edge filter
(If there is sediment here, do not use
connector)
• Breakage and deterioration of O-ring
• Wear, improper contact and trace of
leakage on outlet seal
★ If high-pressure fuel leaks, the seat sur-
face is eroded and fine streaks or flaws
are made.
If this erosion is detected, replace the in-
let connector and injector.
30-22

13. DISASSEMBLY AND ASSEMBLY Removal and installation of fuel injector assembly
PW140-7 VEBM410101
f. Install and finger-tighten retainer (9).
g. Tighten right and left mounting bolts (16) of
fuel injector assembly alternately.
Fuel injector mounting bolt:
8 ± 0.8 Nm {0.8 ± 0.08 kgm}
h. Tighten retaining nut (9) to the specified
torque.
Retaining nut:
50 ± 5 Nm {5.1 ± 0.5 kgm}
2. Install crosshead (15).
★ Since the shapes of holes [a] and [b] of the
crosshead are different, take care when in-
stalling.
(Install the crosshead in the direction of the
intake and exhaust valves recorded when it
was removed.)
3. Install rocker arm (14).
★ Before installing the rocker arm, check that
adjustment screw (13) is loosened thorough-
ly.
★ Check that the ball of the adjustment screw
is fitted to the socket of the push rod.
Rocker arm mounting bolt:
36 ± 5 Nm {3.7 ± 0.5 kgm}
30-23

14. Removal and installation of fuel injector assembly DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
4. Install wiring (11).
★ Since different cylinders have different wire
colors, check their combinations before in-
stalling.
★ Installed positions of wirings
Wiring mounting nut:
1.5 ± 0.25 Nm {0.15 ± 0.03 kgm}
5. Adjusting valve clearance
Referring to Testing and adjusting, "Adjusting
valve clearance", adjust the valve clearance.
• Carry out the following installation in the reverse
order to removal.
[*1]
Blow-by duct mounting bolt:
7 ± 2 Nm {0.7 ± 0.2 kgm}
[*2]
★ If the stud bolts were removed, tighten them to
the following torque.
Stud bolt:
24 ± 4 Nm {2.4 ± 0.4 kgm}
[*3] [*4]
• Do not bend the high-pressure pipe to collect
before installing.
• Be sure to use the genuine high-pressure pipe
clamps and observe the tightening torque.
• After installing the high-pressure pipe, be sure
to install the bellows to the sleeve nut.
★ Before installing the high-pressure pipe, check it
for the following defects. If there is any of these
defects, it can cause fuel leakage. Accordingly,
replace the high-pressure pipe with new one.
• Check the taper seal of the connecting part
(Part "j": Part of 2 mm from the end) for visi-
ble lengthwise slit "k" and dent "l".
• Check part "m" (End of the taper seal: Part at
2 mm from the end) for stepped-type wear
(fatigue) which your nail can feel.
• Install the high-pressure pipe according to
the following procedure.
a. Install the high-pressure pipe and temporari-
ly tighten the sleeve nuts on the common rail
side and cylinder head side.
Sleeve nut:
0.2 - 0.8 Nm {0.02 - 0.08 kgm}
b. Tighten the sleeve nuts on the common rail
side and cylinder head side to the specified
torque.
Sleeve nut:
35 ± 3.5 Nm {3.57 ± 0.36 kgm}
c. Install the sleeve nuts on the common rail
side and cylinder head side.
★ Install each bellows with the slits out and
down.
★ The bellows are installed so that fuel will
not spout over the hot parts of the engine
and catch fire when it leaks for some
reason.
★ If all of the No. 1 - No. 4 injector assemblies were
removed, install the high-pressure pipes, refer-
ring to "Removal and installation of cylinder head
assembly".
Wiring color Cylinder No.
White 1, 3
Black 2, 4
30-24

15. DISASSEMBLY AND ASSEMBLY Removal and installation of front oil seal
PW140-7 VEBM410101
Removal and installation of front oil seal
Special tools
Removal
1. Remove the engine assembly. For details, see
"Removal and installation of engine assembly".
2. Remove crank pulley mounting bolts (1) and
crank pulley (2).
3. Remove seal (3).
Installation
1. Using tool A4, install front oil seal (3).
★ Replace the front oil seal with new one.
★ Before installing the seal, check that the end
corners and lip sliding surfaces of the crank-
shaft are free from flaw, burr, and rust of the
housing.
★ When installing the seal, do not apply oil or
grease to the shaft and seal lip "a". Wipe off
the oil from the shaft.
★ The projection and runout of seal (3) from
cover (C) must be as follows.
• Projection x: Max. 0.38 mm
• Runout y: Max. 0.25 mm
Sym-
bol
Part No. Part name
Necessity
Q'ty
New/Remodel
Sketch
A
4 795-799-6400 Seal puller 1
6 790-331-1120 Wrench (Angle) 1
30-25

16. Removal and installation of front oil seal DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
2. Crank pulley
a. While checking the dowel pin hole on the
back side of the crank pulley (2), install crank
pulley (2) to the crankshaft.
★ If the dowel pin was removed, install it
before installing the crank pulley.
b. Tightening order of crank pulley mounting
bolts (1)
I. Tighten the bolts to
55 ± 5 Nm {5.6 ± 0.5 kgm}
in the diagonal order.
II. Loosen the bolts by 180 °.
III. Tighten the bolts to
55 ± 5 Nm {5.6 ± 0.5 kgm}
in the diagonal order.
IV. Tighten the bolts by
90 ° ± 5 °
(with angle tightening tool A6).
• When not using angle tightening tool
Make a mark on the crank pulley and
each bolt with paint and then tighten the
bolt by 90 ° ± 5 °.
• Carry out the installation in the reverse order to
removal.
30-26

17. DISASSEMBLY AND ASSEMBLY Removal and installation of rear oil seal
PW140-7 VEBM410101
Removal and installation of rear oil seal
Special tools
Removal
Disconnect the cable from the negative (-) termi-
nal of the battery.
1. Remove the work equipment assembly. For de-
tails, see "Removal and installation of work
equipment assembly".
2. Removal of damper
a. Remove 1 damper mounting bolt (1) at the
top.
b. Install guide bolt [1] and remove the 7 re-
maining damper mounting bolts (1).
c. Remove damper (2).
3. Removal of flywheel
a. Remove 2 flywheel mounting bolts (3) on a
diagonal line and install guide bolts [2]. [*1]
b. Sling flywheel (4) and remove the remaining
mounting bolts.
c. Pull out flywheel (4) toward you.
d. Remove guide bolts [2] and lift off flywheel
(4).
Flywheel 35 kg
4. Removal of rear oil seal
a. Install tool A5 to the crankshaft.
b. Tighten tapping screw [3] of tool A5 into the
seal carrier of rear oil seal (5).
c. Turn the handle clockwise to remove rear oil
seal (5).
Sym-
bol
Part No. Part name
Necessity
Q'ty
New/Remodel
Sketch
A 5 795-799-6500 Seal puller 1
4
30-27

18. Removal and installation of rear oil seal DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
Installation
1. Install the rear seal according to the following
procedure.
★ Replace the front oil seal with new one.
★ Do not remove pilot [4] which is attached to
rear seal (5) until rear seal (5) is inserted to
the crankshaft.
★ Before installing the rear seal, degrease,
clean and dry the crankshaft sealing face
and the seal lip face to prevent oil leakage.
2. Insert pilot [4] to crankshaft (6) and push rear
seal (5) into flywheel housing (7).
3. Push in rear seal (5) further and pull out pilot [4].
4. Install rear seal (5) on flywheel housing (7) to the
proper depth by using tool A5.
★ Push in rear seal (5) taking care that there
are no bend etc. on it.
★ Extrusion of rear seal (5) from flywheel hous-
ing (7)
(X): less than 0.38 mm
• Carry out the rest of installation in the reverse or-
der to removal.
30-28

19. DISASSEMBLY AND ASSEMBLY Removal and installation of rear oil seal
PW140-7 VEBM410101
[*1]
★ Tighten the 8 flywheel assembly mounting bolts
in the order of [1] through [8] as shown in the fig-
ure below.
Flywheel assembly mounting bolt:
137 ±7 Nm {13.97 ± 0.71 kgm}
★ Tighten the bolts using bar [5] for preventing
rotation of the flywheel assembly.
• Measurement of radial runout
★ Radial runout: less than 0.13 mm
a. Set dial gauge [6] to the stand, and set it to
flywheel housing (7).
b. Bring the dial gauge probe into contact with
faucet joint portion (a) or the outer perimeter
surface of the flywheel at a right angle.
c. Rotate the flywheel 360° and measure the
difference of the maximum swing of the dial
gauge indicator.
★ Check that the dial gauge indicator is
back in the original position after the fly-
wheel is rotated 360°.
• Measurement of facial runout
★ Facial runout: less than 0.20 mm
d. As in the case of measurement of radial ru-
nout, bring the dial gauge probe into contact
with end surface (b) near the outer perimeter
of the flywheel at a right angle.
★ Conduct measurement pulling the crank-
shaft to either the front or rear side to
prevent errors caused by shakiness.
e. Rotate the flywheel 360 ° and measure the
difference of the maximum swing of the dial
gauge indicator.
30-29

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21. Removal and installation of cylinder head assembly DISASSEMBLY AND ASSEMBLY
PW140-7 VEBM410101
Removal and installation of cylinder head assembly
Special tools
Removal
Disconnect the cable from the negative (-) termi-
nal of the battery.
1. Open the right rear inspection cover and open fu-
el drain valve (1) to drain the fuel.
When fuel tank is full: 275 l
Drain the coolant from the engine.
Coolant water: Approx. 18 l
2. Removal of engine hood
Remove the engine hood. For details, see "Re-
moval and installation of engine hood".
3. Removal of hoses and guard above engine
a. Remove air conditioner compressor drive
belt guard (2).
b. Remove radiator hose (3). [*1]
c. Remove aftercooler hose (5). [*2]
d. Disconnect heater hose (6).
4. Disconnection of air conditioner compressor as-
sembly
a. Disconnect wiring connector A01 (7).
b. Remove 2 air conditioner compressor
mounting bolts (8).
c. Remove drive belt (9).
d. Disconnect air conditioner compressor as-
sembly (10) and move it so that it will not be
an obstacle.
e. Remove bracket (11).
Sym-
bol
Part No. Part name
Necessity
Q'ty
New/Remodel
Sketch
A
1 795-799-6700 Puller 1
2 795-799-1131 Gear 1
3 795-799-8150 Remover 1
6 790-331-1120 Wrench (Angle) 1
7 795-790-4510 Gauge 1
6
3
25
6
30-30

22. DISASSEMBLY AND ASSEMBLY Removal and installation of cylinder head assembly
PW140-7 VEBM410101
5. Removal of alternator
a. Insert the wrench in part A and turn it to the
direction of [a] to loosen fan belt (12).
b. Remove fan belt (12) from alternator (13).
• Set the wrench in hole A securely and then turn
the tension pulley to direction [a]. (The tension
pulley spring is very strong. If the wrench is in-
stalled halfway and turned, it may come off and
can cause a serious accident.)
• After removing the fan belt, return the wrench
slowly and carefully.
• Take care not to catch your fingers between the
pulley and fan belt during the work.
c. Remove the alternator mounting bolts and
disconnect alternator assembly (13). (Move
the alternator without removing wirings (14)
and (15) so that it will not be an obstacle.)
6. Disconnection of muffler and turbocharger as-
sembly
a. Remove guard (16).
b. Loosen 2 U-bands (17).
c. Remove clamp top covers (18) and (19).
d. Remove clamp (20).
e. Slant muffler assembly (21) outward.
16
17
21 20
30-31