This document provides important safety instructions for servicing and repairing machines. It emphasizes that proper service and repair techniques described in the manual are effective and safe methods. Several safety symbols are used to mark important cautions that should always be followed carefully. The document outlines general safety precautions including wearing proper protective equipment, agreeing on operating procedures with other workers, and keeping the work area clean and organized. It also provides preparations for work, such as parking the machine securely, lowering equipment, and removing mud and oil from access areas.

3. A IMPORTANT SAFETY NOTICE
Proper service and repair is extremely important for the safe operation of your machine.
The service and repair techniques recommended by Komatsu and described in this
manual are both effective and safe methods of operation. Some of these operations re-
quire the use of tools specially designed by Komatsu for the purpose.
To prevent injury to workers, the symbols A
JLY
and
$
are used to mark safety pre-
cautions in this manual. The cautions 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.
A SAFETY
GENERAL PRECAUTIONS
Mistakes in operation are extremely dangerous.
Read the Operation and 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 op-
erating procedure before starting. Always
inform your fellow workers before starting
any step of the operation. Before starting
work, hang UNDER REPAIR signs on the
controls in the operator’s compartment.
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 oil or making any repairs,
park the machine on hard, level ground, and
block the wheels or tracks to prevent the
machine from moving.
8. 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 addition, be sure
to lock all the control levers and hang
warning signs on them.
9. When disassembling or assembling, sup-
port the machine 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 it is impossible to use the handrails,
5 Keep all tools in good condition and learn ladders or steps, use a stand to provide safe
the correct way to use them. footing.
00-3

4. PRECAUTIONS DURING WORK 19. Be sure to assemble all parts again in their
11 When removing the oil filler cap, drain plug
or hydraulic pressure measuring plugs,
loosen them slowly to prevent the oil from
spurting out.
Before disconnecting or removing compo-
nents of the oil, water or air circuits, first
remove the pressure completely from the
circuit.
12. 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 car-
rying out any work on the oil or water
circuits.
13. Before starting work, remove the leads from
the battery. Always remove the lead from
the negative (-1 terminal first.
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 capacity.
Install the lifting equipment at the correct
places. Use a hoist or crane and operate
slowly to prevent the component from hit-
ting any other part. Do not work with any
part still raised by the hoist or crane.
15. When removing covers which are under in-
ternal 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. Damaged
wiring may cause electrical fires.
17. 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.
18.As a general rule, do not use gasoline to
wash parts. In particular, use .only the mini-
mum of gasoline when washing electrical
parts.
20
21
original places.
Replace any damaged parts with new parts.
. When installing hoses and wires, be
sure that they will not be damaged by
contact with other parts when the ma-
chine is being operated.
When installing high pressure hoses, make
sure that they are not twisted. Damaged
tubes are dangerous, so be extremely care-
ful when installing tubes for high pressure
circuits. Also, check that connecting parts
are correctly installed.
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 particularly careful to check
that they are installed correctly.
22. When aligning two holes, never insert your
fingers or hand. Be careful not to get your
fingers caught in a hole.
23. When measuring hydraulic pressure, check
that the measuring tool is correctly assem-
bled before taking any measurements.
24.Take care when removing or installing the
tracks of track-type machines.
When removing the track, the track sepa-
rates suddenly, so never let anyone stand at
either end of the track.
00-4

5. FOREWORD
This shop manual has been prepared as an aid to improve the quality of repairs by giving the
serviceman 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 workshop.
For ease of understanding, the manual is divided into chapters for 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 section 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.
MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.
NOTICE
The specifications contained in this shop manual are subject to change at any
time and without any advance notice. Contact your KOMATSU distributor for the
latest information.
00-5

6. HOW TO READ THE SHOP MANUAL
HOW TO READ THE SHOP MANUAL
VOLUMES
Shop manuals are issued as a guide to carry-
ing out repairs. They are divided as follows:
Chassis volume: Issued for every machine
model
Engine volume: Issued for each engine series
Electrical volume
Attachments volume
Each issued as
one volume to
cover all models
These various volumes are designed to avoid
duplicating the same information. Therefore to
deal with all repairs for any model, it is neces-
sary that chassis, engine, electrical and attach-
ment volumes are ready.
DISTRIBUTION AND UPDATING
Any additions, amendments or other
changes will be sent to KOMATSU distributers.
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 shows how to read the
page number.
Example 1 (Chassis volume):
10-3
TT
/
Item number (IO. Structure
and Function)
Consecutive page number for
each item.
Example 2 (Engine volume):
12-410
T
Unit number (I. Engine)
Item number (2. Testing and
Adjusting)
Group No. (4. Fuel system)
Consecutive page No. (Page
10 of Group 4)
3. Additional pages: Additional pages are in-
dicated by a hyphen (-1 and number after the
page number. File as in the example.
Example:
1o-4 12-203
REVISED EDITION MARK (a@)@ ..-a)
When a manual is revised, an edition mark is
recorded on the bottom outside corner of the
pages.
REVISIONS
Revised pages are shown at the LIST OF
REVISED PAGES on the between the title page
and SAFETY page.
SYMBOLS
So that the shop manual can be of ample
practical use, important places for safety and
quality are marked with the following symbols.
Symbol Item Remarks
A
Safety
i
Y Y
*
* Caution
I
Weight
& Coat
I%2
Oil, water
: Drain
Special safety precautions are
necessary when performing the
work.
Extra special safety precautions
are necessary when performing
the work because it is under
internal pressure.
Special technical precautions or
other precautions for
preserving standards are
necessary when performing the
work.
Weight of parts or systems.
Caution necessary when
selecting hoisting wire, or when
working posture is important,
etc.
Places that require special
attention for the tightening
torque during assembly.
Places to be coated with
adhesives and lubricants etc.
Places where oil, water or fuel
must be added, and the
capacity.
Places where oil or water must
be drained, and quantity to be
drained.
1o-5 12-204
00-6

7. HOISTING INSTRUCTIONS
HOISTING INSTRUCTIONS
A Heavy parts (25 kg or more) must be
lifted with a hoist etc. In the Disassembly
and Assembly section, every part weigh-
ing 25 kg or more is indicated clearly with
the symbol &
1. If a part cannot be smoothly removed from
the machine by hoisting, the following
checks should be made:
. Check for removal of all bolts fastening
the part to the relative parts.
l Check for existence of another part
causing interference with the part to be
removed.
2. Wire ropes
I) Use adequate ropes depending on the
weight of parts to be hoisted, referring to
the table below:
Wire ropes
(Standard “Z” or “S” twist ropes
without galvanizing)
Rope diameter (mm) Allowable load (tons)
10 1.o
11.2 1.4
12.5 1.6
14 2.2
16 2.8
18 3.6
20 4.4
22.4 5.6
30 10.0
40 18.0
50 28.0
60 40.0
The allowable load value is estimated to
be one-sixth or one-seventh of the
breaking strength of the rope used.
2) Sling wire ropes from the middle portion
of the hook.
Slinging near the edge of the hook may
cause the rope to slip off the hook during
hoisting, and a serious accident can result.
Hooks have maximum strength at the
middle portion.
100% 88% 79% 71% 41%
FSO064
3) Do not sling a heavy load with one rope
alone, but sling with two or more ropes
symmetrically wound on to the load.
A Slinging with one rope may cause
turning of the load during hoisting,
untwisting of the rope, or slipping of
the rope from its original winding
position on the load, which can result
in a dangerous accident.
4) Do not sling a heavy load with ropes
forming a wide hanging angle from the
hook.
When hoisting a load with two or more
ropes, the force subjected to each rope
will increase with the hanging angles. The
table below shows the variation of
allowable load (kg) when hoisting is made
with two ropes, each of which is allowed
to sling up to 1000 kg vertically, at various
hanging angles.
When two ropes sling a load vertically, up
to 2000 kg of total weight can be
suspended. This weight becomes 1000 kg
when two ropes make a 120” hanging
angle. On the other hand, two ropes are
subjected to an excessive force as large as
4000 kg if they sling a 2000 kg load at a
lifting angle of 150”.
30” 60” 90” 120’ 150”
Lifting angle : u
FSO065
00-7

8. STANDARD TIGHTENING TORQUE
ma STANDARD TIGHTENING TORQUE
1 STANDARD TIGHTENING TORQUE OF BOLTS AND NUTS
The following charts give the standard tightening torques of bolts and nuts. Exceptions are given in
sections of “Disassembly and Assembly”.
Thread diameter Width
of bolt across flat
(mm) (mm)
km Nm
6 10 1.35~0.15 13.2t 1.4
8 13 3.2kO.3 31.4k2.9
10 17 6.720.7 65.7k6.8
12 19 11.5+1.0 112k9.8
14 22 18.Ok2.0 177219
16 24 28.523 279229
18 27 39+4 383t39
20 30 56*6 549258
22 32 76+8 745*78
24 36 94.5* 10 927598
27 41 135*15
30 46 175t20
33 50 225k25
36 55 280r30
39 60 335*35
1320-+140
172Ok 190
221 Or240
27501r: 290
32802340
This torque table does not apply to the bolts with which nylon
ferrous metal washers are to be used, or which require tightening
torque.
* Nm (newton meter): INm + 0.1 kgm
2.TlGHTENlNG TORQUE OF SPLIT FLANGE BOLTS
Use these torques for split flange bolts.
packings or other non-
to otherwise specified
Threaodf zflTeter
(mm)
Width
across flats
(mm)
Tightening torque
kgm Nm
10 14 6.7~0.7 65.7k6.8
12 17 11.5&l 11229.8
22 28.5+3 279k29
00-8

9. STANDARD TIGHTENING TORQUE
Sealing surface
3.TlGHTENlNG TORQUE FOR NUTS OF FLARED
Use these torques for nut part of flared.
Thread diameter Width across flats
of nut part of nut part
(mm) (mm)
T
km
14 19 2.5 kO.5
18 24 522
22 27 822
24 32 14-+3
30 36 18k3
33 41 201+5
36 46 25k5
42 55 3Ok5
Tightening torque
COATING MATERIALS
Nm
24.5 k4.9
49k 19.6
78.5 + 19.6
137.3-t-29.4
176.5229.4
196.1 t49
245.2 k49
294.2+-49
The recommended coating materials prescribed in Komatsu Shop Manuals are listed below.
Nomenclature Komatsu code
LT-IA
Applications
Used to apply rubber pads, rubber gaskets, and cork plugs.
I LT-1 B
I
Used to apply resin, rubber, metallic and
non-metallic parts when a fast, strong seal is needed.
Adhesives LT-2’
LT-3
Preventing bolts, nuts and plugs from loosening and leaking oil.
Provides an airtight, electrically insulating seal.
Used for aluminum surfaces.
LT-4
Used to coat plugs (plate shaped, bowl shaped) and holes, and
mating portion of shaft.
LG-1 Used with gaskets and packings to increase sealing effect.
Sealant gasket
LG-3
Heat-resistant gasket for precombustion chambers
and exhaust piping.
LG-4
LG-5
Used b itself on mounting surfaces on the final drive and transmission
cases. Thrckness after tightening: 0.07 - 0.08 mm)
Y
Used by itself to seal grease fittings, tapered screw fittings and tapered
screw fittings in hydraulic circuits of less than 50 mm in diameter.
Antifriction compound
(Lubricant including
molybdenum disulfide)
Grease
(Lithium grease)
LG-6
LG-7
LM-P
G2-LI
Silicon base type used in combination with LG-1 and LG-4.
Has a shorter curing time than LG-6, and is easier
to peel off.
Applied to bearings and taper shafts to facilitate press-fitting and to
prevent sticking, burning or rusting.
Applied to bearings, sliding parts and oil seals for lubrication, rust
prevention and facilitation of assembling work.
Vaseline
I
- Used for protecting battery electrode terminals from corrosion.
“LT-2 is also called LOCTITE in the shop manuals.
00-9

10. ELECTRIC WIRE CODE
ELECTRIC WIRE CODE
In the wiring diagrams, various colors and symbols are employed to indicate the thickness of wires.
This wire code table will help you understand WIRING DIAGRAMS.
Example: 5WB indicates a cable having a nominal ntimber 5 and white coating with black stripe.
CLASSIFICATION BY THICKNESS
I I
Nominal
number
Copper wire
Number 1Dia. of strands 1Cross section
Cable O.D.
(mm, 1Currentrating 1
Applicable circuit
2.4
I 12 Starting, lighting, signal etc.
3.1 I 20 1 Lighting, signal etc.
4.6 37 Charging and signal
7.0 59 Starting (Glow plug)
11.4 135 Starting
15 I 84 I 0.45 I 13.36
40 85 0.80 42.73
60 127 0.80 63.84 13.6 178 Starting
17.6 230 Starting
100 I 217 I 0.80 109.1
CLASSIFICATION BY COLOR AND CODE
Instrument
I I
Signal Other
Charging Ground Starting
I
Lighting
w
White
WR
Black
Y
Yellow
G
Green
L
Blue
Code
2
Color
Code
3
Auxi_ “‘Or
- liary -
Code
4
Color
Code
5
Color
Code
6
Color
YR GW LW
Yellow &Red Green & White Blue & White
White & Red
YB I
WB
White & Black Yellow & Black Green & Red Blue & Red
YG GY LY
Yellow & Green 1Green &Yellow 1 Blue &Yellow
White &Blue
WG YL I (GB) 1 (LB)
White &Green Yellow&Blue (Green &Black) (Blue &Black)
YW (GL) -
Yellow & White I (Green & Blue) I -
00-10

11. WEIGHT TABLE
A This weight table is a guide for use when transporting or handling components.
Engine assembly
Radiator assembly
Torque converter assembly
Transmission assembly
Center drive shaft
Front drive shaft
Rear drive shaft
Front axle assembly
Rear axle assembly
Front differential assembly
Rear differential assembly
Planetary carrier assembly (1 piece)
Wheel hub (1 piece)
Axle pivot (Rear axle)
Wheel (1 piece)
Tire (1 piece)
~._.
Steering valve
Hydraulic pump (Work equipment +
Steering)
2750
415
169
1428
56
56
47
3140
2900
470
480
115
195
227
452
990
45
-
(Unit: kg)
Hydraulic pump (T/M lubrication +
T/C charging + Switch)
Steering cylinder (1 piece)
Hydraulic tank
I
364
Main control valve 60
Lift cylinder (1 piece) 197
Tilt and Pitch cylinder 190
Engine hood 72
Front frame 3820
Rear frame 2778
Support (upper) 238
Support (Lower) 312
Blade 2375
Rear bumper 427
Fuel tank 389.
Battery (1 piece) 64
Operator’ seat
I 37
Floor plate 348
WD600-1 00-l 1

12. TABLE OF OIL AND COOLANT QUANTITIES
RESERVOIR
Engine oil pan
Brake
Transmission case
Hydraulic system
Axle
(Front and rear)
Fuel tank
Cooling system
FLUID
-22 640 14 32 50 68
-30 -10 0 10 20 3860 lye lg,ZZg Specified
Engine oil
I I I I 1 I
:::r:::i::~~:.::::::ii.,:,,.:.:.:.
“,.,.,.,.,.,.,...‘.
,~~~~~~~~:r:sti~~~~~~~~~~~~~~~~:~~~~~~~~~~~~~
~~~:iDWiiiii:3ILii81:ii)i8)11~
. . . . . . . . . . . . (......... ;.~:.:*:.:.:~.:.,..j*.:;i6i:.:.:.:.:.:.:~~~:::~
““”
..:.:.:(: . . . . .
““.‘.‘.X . ........ . . . . . .!..
:‘:‘:‘+a’.‘-.
. . ,.
. . . . . . . . . . . . . . . ,...,..... I .,...,
.,.:.,.......A:.......
.._,1
,_,
.,._...... ~. I.,.,...,
,.,.
1. 412
,,_,,,.,..,.,.
........ ..,.,.,...,.........,.
.......~
.,.....,...,.,.,.:
.................i.............<................................!.,.............,.........,
I I
See NOTE (4) each 110
Water Add antifreeze 135
ASTM: American Society of Testing and Material
SAE: Society of Automative Engineers
Specified capacity: Total amount of oil including oil for components and oil in piping.
Refill capacity: Amount of oil needed to refill system during normal inspection and maintenance.
NOTE:
(I) When fuel sulphur content is less than 0.5%,
change oil in the oil pan every periodic mainte-
nance hours described in this manual.
Change oil according to the following table if fuel
sulphur content is above 0.5%.
1
(2)
(3)
Fuel sulphur content
Change interval of oil
in engine oil pan
t4)
1
*
Refill
51
(IND OF
AMBIENT TEMPERATURE CAPACITY B?)
110
217
each 110
-
When starting the engine in an atmospheric tem-
perature of lower than 0°C. be sure to use engine
oil of SAEI OW, SAEl OW-30 and SAEl5W-40,
even though an atmospheric temperature goes up
to 10°C more or less in the day time.
Use API classification CD as engine oil and if API
classification CC, reduce. the engine oil change in-
terval to half.
For axle oil, use only recommended oil as follows.
SHELL: DONAX TT or TD
CALTEX: RPM TRACTOR HYDRAULIC FLUID
CHEVRON: TRACTOR HYDRAULIC FLUID
TEXACO: TDH OIL
MOBIL: MOBILAND SUPER UNIVERSAL
t is possible to substitute engine oil CLASS-CD
3AE30 for axle oil.
f noise comes from the brake, it is no problem of
durability.
0°d2 WD600-1

13. TABLE OF OIL AND COOLANT QUANTITIES
PE3EPBYAP MAC,%
HJlM MECTO
CMA3Kk4
6AK PnR TOPM03HOR
rnMLlKOCTM
rt4PPOTPAHCOOPMATOP
KAPTEP MAmA pm
KOPOSKH “EPEAALi
KAPTEP BEwlErO
MOCTA
rnMTM”nl “0&?4M
KOHCIICTEHTHOR
CMABKkl
TEMI-IEPATYPA OKPYMAtOUEU CPEAbl HE06XO)l,HMOE (J-I) MHTEPBAJ’I
Ann
,-
nPM
SAMEtILl
3ar.wne (‘IAC)
I I I I I I
SAElOW Knacc CO.rOCT 8581.63.AC-8,M8r2, BHLlll-HJl360
I I I I I I 8
SHC5W.30 ~nnn rOCT TY38-101-179-17, ~~l”a A
I I I I I I I
SAEJO ~nacca CD
I I I I I rOCT Ml0 LIM
Moropnoe
Macno
120
412
250
250
51
-b
1000
1000
110 500
1000
1000
1
110 2000
2000
J 000
217
2000
WD600-1

14. ENGINE
11 STRUCTURE AND FUNCTION
Engine low idling select system . . . . . . . 1 l-2
1l-1
0

15. ENGINE LOW IDLING SELECT SYSTEM
OUTLINE
. By using the engine low idling selector device to
set the engine low idling speed to two stages, it
is possible to carry out operations more
efficiently.
OPERATION
Selector switch OFF
When the selector switch is OFF, no electric current
flows to solenoid valve (1). so the solenoid valve is
not actuated and the air supply to air cylinder (2) is
shut off. As a result, the air cylinder is not actuated
and the engine speed is set to 650 rpm.
From dry
air tank
Selector switch ON
When the selector switch is turned ON, electric cur-
rent flows to solenoid valve (1). and the solenoid
valve is actuated. Air flows to air cylinder (2). and the
air cylinder rod is pushed out by the air pressure. The
air cylinder rod is connected by a link to accelerator
pedal (31, so the accelerator pedal is depressed by an
amount equal to the movement of the rod. When this
happens, the engine speed is set to approximately
950 rpm.
L
427FO12
427FO13
11-2
0

16. ENGINE
12 TESTING AND ADJUSTING
* The following precautions are necessary when using the Standard Value Tables to make judgement during trouble-
shooting or during testing and adjusting.
1. The values in these tables are based on the values for new machines leaving the plant, so they should be used
as target values when repairing or when estimating wear after a period of use.
2. The standard values in these tables for judgement when troubleshooting are estimated values based on the
standard values for the machine when shipped from the plant, and on the results of various tests.
Therefore, they should be used as reference in combination with repair and operating records when making
judgements.
3. These standard value tables must not be used for standard values when judging claims. In addition, do not use
these values alone to make simple judgements.
Tabel of judgement standard value .
Adjusting valve clearance . . .
Measuring compression pressure. . .
Testing and adjusting fuel
injection timing . . . . . . . . . .
Measuring blow-by pressure . . . .
Testing and adjusting alternator
drive velt tension . . . . . . . . . .
Measuring exhaust gas color . . . . .
Measuring engine oil pressure
and temperature. . . . . . . . . . . . . . .
Measuring accelerator pedal operating
force and operating angle .
. 12- 2
12- 4
. 12- 5
. 12- 6
12- 8
. 12-
. 12-
9
10
. 12- 11

17. TABLE OF JUDGEMENT STANDARD VALUE
(For engine on test bench)
T
Engine
Item
Engine speed
Necessary starting speed
intake resistance
Intake pressure
Exhaust temperature
Exhaust gas color
Valve clearance
(when engine is cold)
Compression pressure
Blow-by pressure
Oil pressure
(Engine water temperature
green range)
Condition
High idling speed
Low idling speed
0°C
-20°C (using starting aid)
All speed
All speed
All speed (intake air temp. 2O’C)
At sudden acceleration
At high idling
Intake valve
Exhaust valve
Oil temperature 40 - 60°C
(engine speed: 210 - 250 rpmj
At high idling .
At high idling
SAE30
At low idling
SAElOW
Unit
rPm
rpm
rpm
rpm
mmH,O
mmHg
OC
Bosch index
Bosch index
mm
mm
kg/cm’
mmH,O
kg/cm’
kg/cm’
Oil temperature
Oil consumption ratio
Fuel injection pressure
Fuel injection timing
Radiator pressure valve
Fan speed
Alternator belt tension
(Drive pulley-Alternator)
Operating force
Operating angle oi
Whole speed range (inside oil pan)
At continuous rated horsepower
(proportion to fuel consumption)
Nozzle tester
Before top dead center
Valve cracking pressure
(Differential pressure)
Engine speed: At rated speed
Deflection when pushing with
finger force approx. 6 kg
“C
%
kg/cm’
degree
kg/cm’
rpm
mm
kg
degree
Stopper height L, mm
Stopper height L, mm
Cable length X 427F1104-1 mm
S6D170-1
f
Cate-
gory
Standard value Permissible value
Min. 80
Min. 80
Max. 300
Max. 950
Max. 650
Max. 6.0
Max. 2.0
635
710
Max. 650
7.0
3.0
0.4
1.0
Min. 29
I
20
Max. 300 600
3.0 - 5.0 2.0
Min. 1.5 0.7
Min. 1.O 0.7
80- 110 120
Max. 0.5 1.o
225klO 205
42 * 1 42 t 1
0.75 ?;0.1 0.75 f. 0.1
I-
1170- 1230 1170- 1230
I-
15 I -
I 6.5
I Max. 10.0
0; 45.4 30 -
I 19
~
-
13
I
_
254
I
-
I 1
* The values given in the Testing and Adjusting data are NOT for adjustment of the output.
Do not use values as a guide to change the setting of the fuel injection pump.
12-2
0

18. (For engine on chassis)
Engine S6D170-1
z
1
E
E
Unit
Check item Condition
wm
rpm
vm
950 - 1000 950 - 1050
650 - 700 650 - 750
3osch index. Max. 6.0 7.0
3osch index. Max. 2.0 3.0
Valve clearance
Intake valve (2O’C)
Exhaust valve (2O’C)
mm
mm
0.4 -
1.0 -
kg/cm’ 20
Min. 29 1
Compression pressure
Oil temp.: 40- 60°C
Engine speed: 210 - 250 rpm
mmHs0 Max. 300 600
Blow-by pressure
(water temperature inside
operating range)
At rated output SAEBO oil
(water temperature inside
operating range)
kg/cm*
kg/cm2
kg/cm’
Oil pressure At high idling
At low idling (SAE30, min.80”C)
At low idling (SAEIOW, min.
z
80°C)
3.0 - 5.0 2.0
Min. 1.5 0.7
Min. 1 .O 0.7
OC 80- 110 120
w
Oil temperature 1 Whole speed range (inside oil pan)
42
I 42?1
v
Fuel injection timing Compression B.T.D.C. degree
mm 15
I
Alternator drive Slackwhen pushed with
belt tension finger force of 10 kg
TESTING AND ADJUSTING TOOL LIST
No.1 Check item I Tool Part Number Remarks
I I I I
I I I I
1 Engine speed Multi-tachometer 799-203-8000 Digital display
L: 60 - 20,000 rpm
H: 60 - 19,999 rpm
2 Water, oil and intake Thermistor kit
temperature
799-l 01-6000 0 - 2oo”c
3 Lubricant pressure Hydraulic tester D 799-l 01-5000 0 - 10 kg/cm2
4 Compression Compression gauge, 795-502-I 590
adapter
0 -
pressure 795-502-1350
70 kg/cm2 KIT NO. 795-502-I 205
5 1 Blow-by pressure 1 Blow-by checker 1 799-201-1503 ( 0 - 500 mmHzO
6 Valve clearance Feeler gauge 795-l 25-1340
7 Exhaust gas color Smoke checker 799-201-9001
0.4, 1.0 mm
Discoloration 0 - 70%
with standard color
(Discoloration % x l/IO =
Bosch index)
12-3
0

19. ADJUSTING VALVE CLEARANCE
* Condition: Engine is cold.
* Adjust clearance between crosshead and rocker lever
as follows.
Cold
Special tool
Intake valve
0.4
Unit: mm
Exhaust valve
1.0
Part No. Part Name CYty
A 795-l 25-1340 Feeler gauge 1
1.
2.
*
3.
Remove cylinder head cover.
Rotate the crankshaft in the normal direction to
align pointer (1) with the 1.6 TOP mark on crank-
shaft pulley. When rotating, check the movement
of the valves. When the pointer is in line with the
1.6 TOP mark, No.1 cylinder should be at compres-
sion top dead center.
The barring method is as follows.
Screw bolts (01010-31240) into the tap holes
(4-Ml2 x 1.75) on thefrontface of the alternator
drive pulley as shown in the figure, then use a bar
to rotate.
When No.1 cylinder is at compression top dead
center, adjust the valve marked 0.
When No.6 cylinder is at compression top dead
center, adjust the valves marked 0.
Cylinder No. 1 2 3 4 5 6
Intakevalve 0 0 0 0 0 0
Exhaust valve 0 0 0 0 0 0
4. To adjust, insert tool A between rocker lever (2)
and crosshead (3) and turn adjustment screw (4)
until clearance is a sliding fit. Then tighten lock nut
(5) to hold adjustment screw in position.
w Lock nut: 6.0 f 1.0 kgm
* After tightening the lock nut, check the clear-
ance again.
5. Next, rotate crankshaft one turn in the normal di-
rection and adjust the valve clearance of the remain-
ing valves marked 0.
* After adjusting No.1 cylinder at compression top
dead center, it is also possible to turn crankshaft
120” each time and adjust the valve clearance of
each cylinder according to the firing order.
- Firing order: l-5-3-6-2-4
Alternator drive
‘4-M12x1.75
F41E01112
426F252
12-4
0

20. Thank you very much for
your reading. Please Click
Here. Then Get COMPLETE
MANUAL. NO WAITING
NOTE:
If there is no response to
click on the link above,
please download the PDF
document first and then
click on it.

21. MEASURING COMPRESSION PRESSURE
* Measurement condition
* Engine oil temperature: 40 to 60°C
- Engine valve clearance: Standard value
- Engine speed: 210 to 250 rpm
Unit: kg/cm’
Item Standard value Permissible value
Compression pressure Min. 29
Special tools
1
* If performance tests or troubleshooting shows that
the piston, piston ring or cylinder liner may be worn,
measure the compression pressure.
a
When measuring the compression pressure,
be careful not to touch the exhaust manifold or
muffler, or to get caught in rotating parts.
Adjust valve clearance.
* For details, see ADJUSTING VALVE CLEAR-
ANCE.
Warm up engine (oil temperature 40 to 6O’C).
Remove nozzle holder assembly.
* For details, see REMOVAL OF NOZZLE
HOLDER ASSEMBLY.
Install tool A and AI in mount of nozzle holder
assembly.
Disconnect fuel CUT-OFF solenoid valve connector.
Crank engine with starting motor and measure com-
pression pressure.
* Measure the compression pressure at the point
where the pressure gauge indicator remains
steady.
* When measuring the compression pressure, meas-
ure the engine speed to confirm that it is within
the specified range.
426POO6
+ Installing the nozzle holder assembly after measuring
the compression pressure.
For details, see INSTALLATION OF NOZZLE
HOLDER ASSEMBLY.
12-5
0

22. TESTING AND ADJUSTING FUEL INJECTION TIMING
* Measurement condition
- Coolant temperature: Inside operating range.
Unit: degree
Item Standard value Permissible value
Fuel injection
timing
B.T.D.C. 42 42 f 1
TESTING FUEL INJECTION TIMING
1.
2.
3.
4.
5.
*
Disconnect fuel injection pipe (1) of No. 1 cylinder.
Remove delivery valve holder (21, then remove
delivery valve (3) and spring (41, and install deliv-
ery valve holder (2) again.
Place accelerator pedal at FULL position.
Operate priming pump and rotate crankshaft
slowly in normal direction. Check point where
fuel stops flowing from delivery valve holder (2). j
Check that 42’ I.J. line on pulley and pointer (5)
are aligned at point where fuel stops flowing.
* BEYOND injection timing line:
Timing RETARDED
* BEFORE injection timing line:
Timing ADVANCED
If the test shows that the fuel injection timing is
incorrect, adjust as follows.
z:
426F253
12-6
0

23. ADJUSTING FUEL INJECTION TIMING BY
DELIVERY CHECK
1.
2.
3.
4.
5.
6.
7.
s
G
8.
0
Turn crankshaft back 50 to 60’ from top dead
center.
Rotate crankshaft to align 42’ I.J. line on crank-
shaft pulley and pointer correctly.
Loosen nut (6) on the injection pump mount
bracket, then loosen 4 mounting bolts (7) of injec-
tion pump.
Move injection pump to outwards, then move injec-
tion pump to cylinder block little by little by
operating priming pump until no fuel flows out of
the delivery valve holder.
Tighten 4 mounting bolts (7) of injection pump.
Tighten nut (6) on injection pump mounting
bracket.
* After tightening the nut, check again that the
fuel stops flowing from the delivery valve holder
at the point where the pointer is aligned with
the line on the crankshaft pulley.
Remove delivery valve holder (2), assemble delivery
valve (3) and spring (4), then install delivery valve
holder (2) again.
m Delivery holder: 11.5 + 0.5 kgm
Connect fuel injection pipe (1).
w Sleeve nut: 2.2 f 0.2 kgm
12-7
0