SEBM036908
MACHINE MODEL
SERIAL NUMBER
WD900-3
50001 and up
•
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.
•
WD900-3 mount the SA12V140-1 engine. For details of the engine, see the 12V140 Series Engine Shop Manual.
© 2022 All Rights Reserved Printed in Japan 07-22 (01)
00-1 (8)
GENERAL
CONTENTS No. of page
01 GENERAL ............................................................................................................................ 01-1 10 STRUCTURE AND FUNCTION ................................................................ 10-1 20 TESTING AND ADJUSTING ........................................................................ 20-1 30 DISASSEMBLY AND ASSEMBLY ....................................................... 30-1 40 MAINTENANCE STANDARD ..................................................................... 40-1 90 OTHERS ................................................................................................................................ 90-1
00-2 (1)
WD900-3
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01 GENERAL GENERAL ASSEMBLY DRAWING ..............................................................................................................01SPECIFICATIONS ........................................................................................................................................01WEIGHT TABLE............................................................................................................................................01LIST OF LUBRICANT AND WATER .............................................................................................................01-
WD900-3
2 3 6 8
01-1
GENERAL
GENERAL ASSEMBLY DRAWING
GENERAL ASSEMBLY DRAWING
01-2
WD900-3
GENERAL
SPECIFICATIONS
Performance
Weight
SPECIFICATIONS WD900-3
Serial No.
50001 and up
Operating weight
kg
100,000
Distribution (front)
kg
50,000
Distribution (rear)
kg
50,000
Blade capacity
3
m
26.0
FORWARD 1st
km/h
7.0
FORWARD 2nd
km/h
12.3
FORWARD 3rd
km/h
28.0
REVERSE 1st
km/h
7.1
REVERSE 2nd
km/h
12.4
REVERSE 3rd
km/h
28.3
Max. rimpull
kN {kg}
686.5 {70,000}
Gradeability
deg
25
Center of outside wheel
mm
9,200
Outside portion of blade
mm
11,285
Overall length
mm
12,035
Overall width without blade
mm
4,585
Blade width
mm
6,470
Blade height
mm
2,160
mm
5,215
Wheelbase
mm
5,450
Tread
mm
3,350
Min. ground clearance
mm
480
Travel speed
Min. turning radius
Dimensions
Machine model
Overall height
WD900-3
(top of ROPS cab)
01-3
Engine
GENERAL
SPECIFICATIONS
Machine model
WD900-3
Serial No.
50001 and up
Model
SA12V140-1
Type
4-cycle, water-cooled, V type, 12-cylinder direct injection, with 2-turbocharger, after-cooler
No. of cylinders - bore x stroke
mm
12 – 140 x 165
Piston displacement
l {cc}
30.48 {30,480}
Flywheel horsepower
kW/rpm {HP/rpm}
637/2,000 {853/2,000}
Maximum torque
Nm/rpm {kgm/rpm}
4,090/1,300 {417/1,300}
g/kWh {g/HPh}
200 {145}
High idling speed
rpm
2,220
Low idling speed
rpm
650/850
Performance
Fuel consumption ratio
Starting motor
24 V, 7.5 kW x 2
Alternator
24 V, 75 A
Battery
12 V, 200 Ah x 4 3-element, 1-stage, single-phase (TCA51-1A)
Axle, wheel
Power train
Torque converter Transmission
Planetary gear, multiple-disc, hydraulically actuated, modulation type
Reduction gear
Spiral bevel gear
Differential
Straight bevel gear
Final drive
Planetary gear, single reduction, oil bath
Drive type
Front/rear-wheel drive
Front axle
Fixed-frame, full-floating
Rear axle
Center pin support type, full-floating
Tire Wheel rim
Brakes
Inflation pressure
01-4
45/65 R45 XLDD1 (L-4) 36.00 x 45WTB kPa {kg/cm } 2
667 {6.80}
Main brake
Front/rear wheel braking, separate front/rear wheel, wet disc, hydraulically actuated
Parking brake
Mounted on front axle input shaft, dry disc, hydraulically release spring apply
WD900-3
Machine model
WD900-3
Serial No.
50001 and up Articulated type
Structure
Cylinder
Control valve Set pressure
Hydraulic system Work equipment
SPECIFICATIONS
Type
Hydraulic pump delivery
Steering system
GENERAL
Fully hydraulically power steering
Torque converter, transmission pump
l/min
421 (Gear type: SAR(4)112+SAR(3)100)
Steering pump
l/min
307 (Fixed capacity piston pump: HPF76+71)
Switch pump
l/min
405 (Fixed capacity piston pump: HPV95+95)
Additional oil cooler fan pump
l/min
51 (Gear type: SAR(1)025)
Front brake cooling pump
l/min
67.8 (Gear type: SBL(1)24)
Rear brake cooling pump
l/min
67.8 (Gear type: SBR(1)24)
PPC pump
l/min
68 (Gear type: SAR(1)032)
Brake pump
l/min
29 (Gear type: SAR(1)014)
Work equipment pump
l/min
405 (Variable capacity piston pump: HPV90+90)
Transmission valve
MPa {kg/cm2}
2.5 {25} (Spool type, electric control)
Steering demand valve
MPa {kg/cm2}
31.4 {320} (Fully hydraulic type)
PPC valve
MPa {kg/cm2}
3.7 {38} (2-lever type)
Main control valve
MPa {kg/cm2}
31.4 {320} (2-spool type)
Steering cylinder No. - bore x stroke
mm
Reciprocating piston 1 – 160 x 503
Lift cylinder No. - bore x stroke
mm
Reciprocating piston 1 – 200 x 1,300
Tilt cylinder No. - bore x stroke
mm
Reciprocating piston 2 – 225 x 240
Blade type
Semi U-blade
Blade frame type
Outer frame
WD900-3
01-5
GENERAL
WEIGHT TABLE
WEIGHT TABLE
k This weight table is a guide for use when transporting or handling components. Machine model
WD900-3
Serial No.
50001 and up
Engine
3,200
Radiator
1,200
Torque converter
590
Transmission
2,300
Damper
178
Upper drive shaft
68.5
Center drive shaft
190
Front drive shaft
180
Rear drive shaft
190
Center support
154
Front axle
8,190
Rear axle
7,700
Front differential assembly
1,226
Rear differential assembly
1,256
Planetary carrier assembly (each)
238
Planetary hub assembly (each)
600
Axle pivot (Rear axle)
286
Wheel (each)
845
Tire (each)
2,130
Steering demand valve
58
Steering cylinder (each)
203
Hydraulic tank
823
Work equipment pump
167
Parking brake assembly
185
Torque converter charging + PPC + brake pump
49
Switch pump
141
Switch + additional oil cooler fan pump
151
Steering pump
141
Fender and guard assembly
1,393
PPC valve
5.5
Main control valve (each)
95
DC · CO valve
90
Lift cylinder (each)
621
Tilt cylinder
598
Fender and ladder assembly
1,720
01-6
Unit: kg
WD900-3
GENERAL
WEIGHT TABLE
Unit: kg Machine model
WD900-3
Serial No.
50001 and up
Engine hood
88 (Top) 28 (Side)
Front frame
9,966
Rear frame
9,855
Outer frame (L.H.)
1,136
Outer frame (R.H.)
1,148
H linkage
1,408
Y linkage
1,338
Support (L.H.)
1,909
Support (R.H.)
1,913
Blade
7,149
Counterweight
2,900
Fuel tank
780
Battery (each)
59
Cab
430
Air conditioner unit
55
Operator’s seat
48
Floor plate
348
ROPS support assembly
1,387
WD900-3
01-7