service repair manual

1. SEBM040800
Shop
Manual
D65WX-15EO
POWER ANGLE POWER TILT DOZER
SERIAL NUMBERS D65WX-15E0 69001 and up
This material is proprietary to Komatsu America Corp. and is not to be reproduced, used, or disclosed except in
accordance with written authorization from Komatsu America Corp.
It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to
make changes or improvements at any time without incurring any obligation to install such changes on products
sold previously.
Due to this continuous program of research and development, revisions may be made to this publication. It is
recommended that customers contact their distributor for information on the latest revision.
Copyright 2007 Komatsu
Printed in U.S.A.
Komatsu America Corp.
May 2007

2. D65WX-15E0 1
CONTENTS
No. of page
General
Specification dimensions .................................................................................................... 2
Specifications...................................................................................................................... 3
Weight table........................................................................................................................ 8
Structure, Function and Maintenance Standard
Frame assembly .................................................................................................................10
Track frame, recoil spring ................................................................................................... 12
Hydraulic cylinder ..............................................................................KA charge is contained
PPC valve........................................................................................................................... 16
Control valve....................................................................................................................... 22
Self pressure reducing valve .............................................................................................. 50
Work equipment..................................................................................................... KA charge
Cutting edge, end bit ............................................................................................. KA charge
Others
Hydraulic circuit diagram
Work equipment hydraulic circuit diagram (For PAT dozer) ............................................. 57

3. 2 D65WX-15E0
GENERAL SPECIFICATION DIMENSIONS
SPECIFICATION DIMENSIONS
D65WX-15E0 PAT dozer with ROPS guard, cab, and air conditioner
Item Unit D65WX-15E0
Machine weight kg 21,670
Engine name — Komatsu SAA6D114E-3 diesel engine
Rated engine output kW {HP}/rpm 153 {205}/1,950 (Net)
A Overall length mm 5,590
B Overall height (excluding antenna) mm 3,220
C Overall width mm 3,800
Travel speed
(1st/2nd/3rd gear speed)
Forward km/h 3.3/6.3/10.1
Reverse km/h 4.4/8.2/12.9
aPAT : Abbreviation for Power Angle power Tilt

4. D65WX-15E0 3
GENERAL SPECIFICATIONS
Machine name and type
D65WX-15E0
PAT dozer
Serial number 69001 and up
Weight
Machine weight
• Bare tractor kg 18,190
• With work equipment kg 20,940
• With work equipment and ROPS cab kg 21,670
• With work equipment, ripper, and ROPS cab kg (23,350)
Performance
Min. swing radius m — [Pivot turn]
Gradeability deg. 30
Stability (Front, rear, left, right) deg. 35
Travelspeed
Forward 1st km/h 3.3
Forward 2nd km/h 6.3
Forward 3rd km/h 10.1
Reverse 1st km/h 4.4
Reverse 2nd km/h 8.2
Reverse 3rd km/h 12.9
Groundpressure
Tractor unit
kPa
{kg/cm2
}
45.4
(0.46)
With work equipment
kPa
{kg/cm2
}
52.2
(0.53)
With work equipment and ROPS cab
kPa
{kg/cm2
}
54.0
(0.55)
With work equipment, ripper, and ROPS cab
kPa
{kg/cm2
}
58.2
(0.59)
Dimensions
Overall
length
Tractor unit mm 4,335
With work equipment mm 5,590
Overall
width
Tractor unit mm 2,710
With work equipment mm 3,800
Overallheight
Up to exhaust pipe mm 2,990
Up to top of operator’s seat mm 2,315
When ROPS cab is installed (excluding antenna) mm 3,220
When ROPS canopy is installed mm 3,220
When cab is installed (excluding antenna) mm 3,080
Track gauge mm 2,050
Length of track on ground mm 2,980
Track width (Standard track shoe) mm 660
Minimum ground clearance mm 405
aPAT : Abbreviation for Power Angle power Tilt
aValues in ( ) are shown for reference.
SPECIFICATIONS

5. 4 D65WX-15E0
GENERAL SPECIFICATIONSEngine
Name SAA6D114E-3
Type
4-cycle, water-cooled, in-line, vertical,
direct-injection, with turbocharger and
air-cooled aftercooler
Number of cylinders – bore x stroke mm 6 – 114 x 135
Total displacement l {cc} 8.27 {8,270}
Performance
Flywheel horsepower
kW/rpm
{HP/rpm}
153/1,950 {205/1,950} (Net)
Max. torque
Nm/rpm
{kgm/rpm}
1,012/1,450 {103/1,450} (Gross)
High idle speed under no load rpm 2,030 ± 50
Low idle speed under no load rpm 825 ± 25
Min. fuel consumption ratio
g/kWh
{g/HPh}
227 {169}
Starting motor 24 V, 7.5 kW
Alternator 24 V, 60 A
Battery (*1) 12 V, 112 Ah, 2 units (145F51)
Type of radiator core Corrugated aluminum, 8.0/2
Powertrain
Torque converter 3-element, 1-stage, 1-phase type
Transmission
Planetary gear, multiple disc, hydraulic, gear
pump forced lubrication, 3 forward/reverse gear
speeds, manual electronic type
Bevel gear shaft
Spiral bevel gear, gear pump forced
lubrication type
HSSunit
HSS
Differential planetary gear, hydraulic motor drive,
manual electronic, hydraulic type
Brake
Wet multiple disc, spring-boosted, foot-operated,
hydraulic type
Final drive
1-stage spur gear/1-stage planetary gear
reduction, splash lubrication type
Undercarriage
Type of suspension Semi-hard, equalizing beam type
Carrier roller 2 pieces on each side
Track roller 8 pieces on each side
Track shoe Width: 660 mm
42 pieces on each side
Pitch: 203.2 mm• Assembly type single grouser shoe
aPAT : Abbreviation for Power Angle power Tilt
*1 : The battery capacity (Ah) is on 5-hours rate.
Machine name and type
D65WX-15E0
PAT dozer
Serial number 69001 and up

6. D65WX-15E0 5
GENERAL SPECIFICATIONS
Hydraulicsystem
Hydraulicpump
HSS pump HPV95, variable-capacity piston,
load sensing type
112
• Type
• Theoretical capacity cm3
/rev
Cooling fan pump
LPV30, variable-capacity piston type
30
• Type
• Theoretical capacity cm3
/rev
Power train and lubricating oil pump
SAL (2) 45 + 45, gear type (Tandem)
43.7 x 2
• Type
• Theoretical capacity cm3
/rev
Scavenging pump
Gear type
61.2
• Type
• Theoretical capacity cm3
/rev
Hydraulicmotor
HSS motor HMF95, fixed-capacity piston type
with brake valve
96
• Type
• Motor capacity cm3
/rev
Cooling fan motor
LMF28, fixed-capacity piston type
28
• Type
• Motor capacity cm3
/rev
Controlvalve
Type and quantity
5-spool type, 1 piece
(Ripper: Provision)
Control method Hydraulic assist type
Hydraulic tank Box type (External control valve type)
Hydraulic oil filter Return side of tank
Oil cooler Air-cooled type (3A-CS)
aPAT : Abbreviation for Power Angle power Tilt
Machine name and type
D65WX-15E0
PAT dozer
Serial number 69001 and up

7. 6 D65WX-15E0
GENERAL SPECIFICATIONSWorkequipmenthydraulicsystem
Liftcylinder
Type Double-acting piston type
Cylinder bore mm 95
Piston rod diameter mm 65
Stroke mm 1,140
Max. distance between pins mm 1,780
Min. distance between pins mm 640
Tiltandpitchcylinder
Type KA charge
Cylinder bore mm
Piston rod diameter mm
Stroke mm
Max. distance between pins mm
Min. distance between pins mm
Anglecylinder
Type KA charge
Cylinder bore mm
Piston rod diameter mm
Stroke mm
Max. distance between pins mm
Min. distance between pins mm
Rippercylinder
Type Double-actiong piston type
Cylinder bore mm 140
Piston rod diameter mm 70
Stroke mm 330
Max. distance between pins mm 1,080
Min. distance between pins mm 750
Workequipment
Type Power angle Power tilt dozer
Left and Right: Angle cylinder
Right: Tilt cylinderBlade supporting method
Performance
Max. lift (above ground) mm 1,170
Max. drop (below ground) mm 810
Max. tilting distance mm 920
Blade angle range deg. —
Dimensions
Blade width mm 3,800
Blade height mm 1,210
Blade angle deg. KA Charge
aPAT : Abbreviation for Power Angle power Tilt
Machine name and type
D65WX-15E0
PAT dozer
Serial number 69001 and up

8. D65WX-15E0 7
GENERAL SPECIFICATIONS
Ripper
Type Parallelogram
Beam length mm 2,170
Number of shanks piece 3
Performance
Digging angle (A/B) deg. 55/45
Digging depth Changeable to 3 levels
Max. digging depth mm 595
Max. lift mm 640
Shank position (Left/Right) mm 950/950
aPAT : Abbreviation for Power Angle power Tilt
Machine name and type
D65WX-15E0
PAT dozer
Serial number 69001 and up

9. 8 D65WX-15E0
GENERAL WEIGHT TABLE
Unit: kg
Machine name and type
D65WX-15E0
PAT dozer
Serial number 69001 and up
Engine and damper assembly (Excluding coolant and oil) 1,000
• Engine assembly 860
• Damper assembly 48
• Engine-related parts (Wiring, mount) 45
Universal joint 21
Cooling assembly (Excluding coolant and oil) 125
• Radiator assembly 27
• Aftercooler assembly 21
• Hydraulic oil cooler 3
Cooling fan pump 28
Cooling fan motor 13
Fuel tank (Excluding fuel) 200
Power train unit assembly (Excluding oil) 1,435
• Torque converter and PTO assembly 290
• Transmission assembly 340
• Transmission ECMV assembly 13
• Main relief valve assembly 6
• HSS unit assembly 710
• Brake valve assembly 6
HSS motor 45
HSS pump 65
Power train and lubrication oil pump 20
Scavenging pump 5
Hydraulic tank (Excluding oil) 75
Control valve
• 5-spool valve (Ripper: Provision) 115
Final drive assembly (Each side) 790
Sprocket (Each side) 8.3 x 9
Frame assembly 2,450
Engine underguard 140
Transmission underguard 30
aPAT : Abbreviation for Power Angle power Tilt
WEIGHT TABLE
k This weight table is for reference in handling or transporting components.

10. D65WX-15E0 9
GENERAL WEIGHT TABLE
Undercarriage assembly (Each side) 1,570
• Track frame 610
• Idler assembly (Each side) 200
• Recoil spring assembly (Each side) 250
• Single flange track roller assembly (Each side) 54 x 6
• Double flange track roller assembly (Each side) 61 x 2
• Carrier roller assembly (Each side) 30 x 2
Track shoe assembly (Each side)
• Single grouser shoe (660 mm) 1,675
Pivot shaft (Each side) 100
Equalizer bar 145
Floor frame assembly 300
Operator seat 59
Cab assembly 410
ROPS guard assembly (for cab) 220
ROPS canopy assembly 410
PAT dozer assembly 2,750
• Blade 1,250
• U-frame 1,250
• Angle cylinder 80 x 2
• Tilt cylinder 85
Lift cylinder assembly 95 x 2
Ripper assembly 1,530
Ripper cylinder assembly 75
aPAT : Abbreviation for Power Angle power Tilt
Unit: kg
Machine name and type
D65WX-15E0
PAT dozer
Serial number 69001 and up

11. 10 D65WX-15E0
STRUCTURE, FUNCTION AND
MAINTENANCE STANDARD FRAME ASSEMBLY
FRAME ASSEMBLY
DX65WX-15E0 (For PAT dozer)

12. D65WX-15E0 11
STRUCTURE, FUNCTION AND
MAINTENANCE STANDARD FRAME ASSEMBLY
3. Frame assembly
4. Undercover
5. Engine mount
6. Power train unit mount
7. Trunnion
Outline
• Frame assembly (3) has a hull frame structure,
on which the radiator guard, main frame, steer-
ing case, and transmission guard are assembled
into 1 unit.
Unit: mm
No. Check item Criteria Remedy
1
Clearance between cylinder yoke
and bushing (Large)
Standard
size
Tolerance Standard
clearance
Clearance
limit
Replace bushing
Shaft Hole
85
–0.036
–0.090
+0.207
+0.120
0.156 –
0.297
0.5
2
Clearance between cylinder yoke
and bushing (Small)
65
–0.030
–0.076
+0.174
+0.100
0.130 –
0.250
0.5

13. 12 D65WX-15E0
STRUCTURE, FUNCTION AND
MAINTENANCE STANDARD TRACK FRAME, RECOIL SPRING
TRACK FRAME, RECOIL SPRING
D65WX-15E0 (For PAT dozer)
aPAT : Abbreviation for Power Angle power Tilt
1. Idler
2. Carrier roller
3. Track frame
4. Sprocket teeth
5. Track roller guard
6. Track roller
7. Yoke
8. Seal
9. Piston
10. Recoil spring
11. Wear ring
12. U-packing
13. Cabin
14. Nut
15. Lubricator
16. Cylinder
17. Bushing
18. Holder

14. D65WX-15E0 13
STRUCTURE, FUNCTION AND
MAINTENANCE STANDARD TRACK FRAME, RECOIL SPRING
Outline
• Recoil spring (10) is used to adjust the track
shoe tension by supplying grease through lubri-
cator (15) or discharge existing grease and mov-
ing piston (9) forward or in reverse. It also damps
sudden shocks applied to idler (1).
S: Single flange
D: Double flange
aPAT : Abbreviation for Power Angle power Tilt
Unit: mm
No. Check item Criteria Remedy
19 Deformation of track frame
Item Repair limit
RepairBend
Twist
Opening of idler
7 (in length of 3,000)
3 (in length of 300)
5
20 Recoil spring
Standard size Repair limit
Replace
Free length x
Outside diameter
Installed length Installed load Free length Installed load
791.5 x 239 634
189.5 kN
{19,320 kg}
772
168.6 kN
{17,195 kg}
21
Clearance between piston and
bushing
Standard
size
Tolerance Standard
clearance
Clearance
limit
Replace bushing
Shaft Hole
90
–0.039
–0.090
+0.270
+0.061
0.100 –
0.360
1.0
22 Press fitting force of idler yoke 392 kN {40 ton} Adjust
— Quantity of grease 140 cc (Grease: G2-LI) —
Q’ty on
each side
Flange type and arrangement
D65WX-15E0
(For PAT dozer)
8 pcs. S, S, D, S, S, D, S, S

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16. 14 D65WX-15E0
STRUCTURE, FUNCTION AND
MAINTENANCE STANDARD HYDRAULIC CYLINDER
HYDRAULIC CYLINDER
For power angle power tilt dozer
LIFT CYLINDER
TILT CYLINDER
ANGLE CYLINDER
KA Charge
KA Charge

17. D65WX-15E0 15
STRUCTURE, FUNCTION AND
MAINTENANCE STANDARD HYDRAULIC CYLINDER
RIPPER LIFT CYLINDER
Unit: mm
No. Check item Criteria Remedy
1
Clearance between piston rod
and bushing
Cylinder
name
Standard
size
Tolerance Standard
clearance
Clearance
limit
Replace
bushing
Shaft Hole
Lift 65
–0.030
–0.104
+0.262
+0.067
0.097 –
0.366
0.666
Tilt
Angle
Ripper 70
–0.025
–0.087
+0.271
+0.075
0.105 –
0.375
0.675
2
Spherical clearance between
piston rod and trunnion
Lift S 85
–0.2
–0.3
+0.3
0
0.2 – 0.5 1.0 Adjust shim
or replace
Tilt
Angle
Clearance between piston rod
support shaft and bushing
Ripper 75
–0.030
–0.076
+0.174
+0.100
0.130 –
0.250
1.0
Replace
bushing
3
Clearance between cylinder
boss and bushing
Lift 55
–0.100
–0.174
+0.116
0
0.100 –
0.290
1.0
Clearance between cylinder
bottom support shaft and
bushing
Tilt
Angle
Ripper 75
–0.030
–0.076
+0.174
+0.100
0.130 –
0.250
1.0
4
Tightening torque of cylinder
head
Lift 735 ± 74.0 Nm {75.0 ± 7.5 kgm}
Retighten
Tilt
Angle
Tightening torque of cylinder
head mounting bolt
Ripper 162 ± 14.7 Nm {16.5 ± 1.5 kgm}
5
Tightening torque of cylinder
piston clamping nut
Lift 1.08 ± 0.11 kNm {110 ± 11.0 kgm} (Width across flats: 50 mm)
Tilt
Angle
Ripper 3.97 ± 0.40 kNm {405 ± 40.5 kgm} (Width across flats: 80 mm)