WA900-3 01-3

SPECIFICATIONS

Perfo

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ceGENERAL SPECIFICATIONS

Wei

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Min. turningradius

Center of outside wheelOutside portion of chassis

Dim

ensio

ns

01-3(6)

Machine model WA900-3Serial No. 50001 – 50026 50027 and up

Operating weight kg 101,550Distribution (front) kg 55,750Distribution (rear) kg 45,800Bucket capacity (piled) m3 13.0Rated load kg 23,400Travel speed FORWARD 1st km/h 7.0

FORWARD 2nd km/h 12.3FORWARD 3rd km/h 28.0REVERSE 1st km/h 7.1REVERSE 2nd km/h 12.4REVERSE 3rd km/h 28.3

Max. rimpull kN {kg} 588.4 {60,000}Gradeability deg 25

mm 9,200mm 11,000

Overall length mm 14,270 (with tooth)Overall width (chassis) mm 4,585Bucket width mm 4,760 (Cutting edge)

5,045 (Tire guard)Overall height (top of ROPS cab) mm 5,275

(Bucket raised) mm 9,680Wheelbase mm 5,450Tread mm 3,350Min. ground clearance mm 550Height of bucket hinge pin mm 6,960Dumping clearance (tip of edge) mm 5,020Dumping reach (tip of edge) mm 2,215Bucket dump angle deg 47 (Max. height)Bucket tilt angle (SAE carrying position) deg 50Digging depth (10° dump) (tip of edge) mm 470

01-4 WA900-3

4-cycle, water-cooled, V type,12-cylinder direct injection, with

2-turbocharger, after-cooler

Perfo

rman

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gine

3-element, 1-stage, single-phase(TCA51-1A)

Planetary gear, multiple-disc, hy-draulically actuated, modulation type

Planetary gear, single reduction,oil bath

Pow

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ain

Axle

, whe

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GENERAL SPECIFICATIONS

Machine model WA900-3Serial No. 50001 – 50026 50027 and up

Model SA12V140Type

No. of cylinders – bore ¥ stroke mm 12 – 140 ¥ 165Piston displacement ¬ {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}Fuel consumption ratio g/kW·h {g/HP·h} 200 {145}High idling speed rpm 2,260Low idling speed rpm 650/850

Starting motor 24 V 7.5 kW ¥ 2Alternator 24 V 75 ABattery 12 V 200 Ah ¥ 4Torque converter

Transmission

Reduction gear Spiral bevel gearDifferential Straight bevel gearFinal drive

Drive type Front/rear-wheel driveFront axle Fixed-frame, full-floatingRear axle Center pin support type, full-floatingTire 45/65-45-58PR(L-5)Wheel rim 36.00 ¥ 45WTBInflation pressure kPa {kg/cm2} 667 {6.80}

Main brake Front/rear wheel braking, separatefront/rear wheel, wet disc,

hydraulically actuatedParking brake Mounted on front axle input shaft, dry

disc, hydraulically release spring apply

01-4(11)

WA900-3 01-5

Machine model WA900-3Serial No. 50001 – 50026 50027 and up

Type Articulated typeStructure Fully hydraulically power steering

Torque converter, ¬/min 421 421transmission pump (Gear type: (Gear type:

SAR(4)112+SAR(3)100) SAR(4)112+SAR(3)100)

Steering pump ¬/min 307 307(Fixed capacity piston (Fixed capacity piston

pump: HPF76+71) pump: HPF76+71)

Switch pump ¬/min 405 405(Variable capacity piston (Variable capacity pistonpump: HPV90+90) pump: HPV95+95)

PPC pump ¬/min 68 68(Gear type: (Gear type:SAR(1)032) SAR(1)032)

Brake pump ¬/min 29 29(Gear type: (Gear type:SAR(1)014) SAR(1)014)

Work equipment pump ¬/min 405 405(Variable capacity piston (Variable capacity pistonpump: HPV90+90) pump: HPV95+95)

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} 34.3 {350}(2-spool type)

Steering cylinder Reciprocating pistonNo. – bore × stroke mm 2 – 160 × 503

Boom cylinder Reciprocating pistonNo. – bore × stroke mm 2 – 260 × 1,368

Bucket cylinder Reciprocating pistonNo. – bore × stroke mm 1 – 300 × 906

Link type Single Z bar link

Bucket edge type Spade nose bucket with teeth

GENERAL SPECIFICATIONSSt

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gsy

stem

Hydr

aulic

sys

tem

Work

equip

ment

ControlvalveSetpressure

Cylinder

HydraulicpumpDelivery

01-5(6)

01-6 WA900-3

WEIGHT TABLE

GENERAL WEIGHT TABLE

Machine model WA900-3Serial No. 50001 – 50026 50027 and up

Engine 3,200 3,200Radiator 1,200 1,200Torque converter 590 590Transmission 2,300 2,300Damper 178 178Upper drive shaft 58 58Center drive shaft 184 184Front drive shaft 171 171Rear drive shaft 184 184Center support 165 165Front axle 8,190 8,190Rear axle 7,700 7,700Front differential assembly 1,226 1,226Rear differential assembly 1,256 1,256Planetary carrier assembly (each) 238 238Planetary hub assembly (each) 600 600Axle pivot (Rear axle) 286 286Wheel (each) 874 874Tire (each) 2,720 2,720Steering demand valve 66 66Steering cylinder (each) 206 206Hydraulic tank 824 824Work equipment pump 150 150Parking brake assembly 185 185Torque converter charging + PPC + brake pump 49 49Switch pump 150 157Steering pump 145 145Fender and guard assembly 1,393 1,393PPC valve 4 4

Unit: kg¤ This weight table is a guide for use when transporting or handling components.

01-6(6)

WA900-3 01-7

GENERAL WEIGHT TABLE

Machine model WA900-3Serial No. 50001 – 50026 50027 and up

Main control valve (each) 95 95Boom cylinder (each) 998 998Bucket cylinder 1,210 1,210Engine hoodFront frame 7,845 7,845Rear frame 9,319 9,319Bucket link (including bushing) 566 566Bellcrank (including bushing) 1,850 1,850Boom (including bushing) 8,690 8,690Bucket (with teeth) 12,320 12,320Counterweight + weight 2,900 + 2,600 2,900 + 2,600Fuel tank 780 780Battery (each) 59 59Cab 430 430Air conditioner unit 55 55Operator’s seat 48 48Floor plate 348 348ROPS support assembly 1,387 1,387

Unit: kg

01-7(6)

88 (Top)28 (Side)

88 (Top)28 (Side)

01-8 WA900-3

GENERAL LIST OF LUBRICANT AND WATER

AMBIENT TEMPERATURE CAPACITYKIND OFRESERVOIR FLUID Specified Refill–22 –4 14 32 50 68 86 104 122°F–30 –20 –10 0 10 20 30 40 50°C

SAE 10WSAE 10W-30

SAE 30

SAE 15W-40

140 ¬ 132 ¬

LIST OF LUBRICANT AND WATER

SAE 30SAE 10W

164 ¬ 140 ¬

1,065 ¬ 725 ¬

42 ¬ 31 ¬SAE 10W

SAE 10W

See Note 1

– –

301 ¬ –

NLGI No.2 [ª1, 2]

ASTM D975 No.2ª

Engine oil pan

Transmission case

Hydraulic system

Brake

Axle(Front and rear)(each)

Pins

Fuel tank

Cooling system Water

Dieselfuel

Grease

Engineoil

360 ¬ 360 ¬

ª ASTM D975 No.1

Note 1:For axle oil, use only recommended oil as follows.SHELL: DONAX TDMOBILE: MOBILFLUID 424ESSO: TORQUE FLUID 56It is possible to substitute engine oil CLASS-CDSAE30 for axle oil.If noise comes from the brake, it is no problem ofdurability.

1,425 ¬ –

Add antifreeze

fl In cold areas when the hydraulic oiltemperature is low, if the steering wheel isturned and the machine is stopped in thatposition, there may be a time lag beforethe machine turns and stops.If this happens, turn the steering wheelslowly to the left and right (repeat for about10 minutes) and the oil inside the steeringvalve will be warmed up.

[ª1]: When working in particularly severeconditions, use a multi-purpose greasecontaining 3 – 5% molybdenum.

[ª2]: For machines equipped with an auto-grease system, if the machine is operatedin temperatures below –20°C, use lithium-based grease No. 0 for the grease.

01-8(6)

WA900-3 10-1

10 STRUCTURE AND FUNCTION

(10)

Power train ................................................... 10- 2Power train system ...................................... 10- 3Engine control .............................................. 10- 4Servo cylinder .............................................. 10- 5Radiator and cooler ..................................... 10- 9Damper.......................................................... 10-10Torque converter and

transmission piping............................... 10-11Transmission hydraulic

system diagram ..................................... 10-12Transmission hydraulic

circuit diagram ....................................... 10-13Torque converter ......................................... 10-14Transmission ................................................ 10-19Transfer ......................................................... 10-27Transmission control valve......................... 10-28Torque convertor oil cooler ........................ 10-46Drive shaft .................................................... 10-47Center support ............................................. 10-48Axle................................................................ 10-49Final drive ..................................................... 10-54Axle mount ................................................... 10-56Center hinge pin .......................................... 10-58Tire and wheel ............................................. 10-59Steering piping diagram ............................. 10-60Steering column........................................... 10-61Joystick linkage ......................................... 10-61-1Steering pump ............................................. 10-62Switch pump ................................................ 10-65Steering demand valve ............................... 10-73Steering unit (Orbit-roll valve) ................... 10-84Proportional solenoid valve ..................... 10-86-1EPC valve ................................................... 10-86-2Rotary valve ............................................... 10-86-3Tow-way restrictor valve............................. 10-87Diverter valve ............................................... 10-88Brake piping ................................................. 10-92Brake circuit diagram .................................. 10-94Brake valve ................................................... 10-96Charge valve ............................................... 10-101Accumulator (for brake) ............................ 10-105Slack adjuster ............................................. 10-106Brake............................................................ 10-109Parking brake .............................................. 10-110Spring cylinder ........................................... 10-112Parking brake solenoid valve ................... 10-113Hydraulic piping ......................................... 10-114

Work equipment hydraulic circuit diagram .. 10-118Work equipment lever linkage ................. 10-125Hydraulic tank ............................................ 10-126Main piston pump ..................................... 10-129ES valve ...................................................... 10-137Servo valve ................................................. 10-139PPC valve .................................................... 10-142PPC relief valve .......................................... 10-146Accumulator (for PPC valve) .................... 10-147Main control valve ..................................... 10-148Cooling fan hydraulic piping ........................ 10-161Cooling fan hydraulic circuit diagram ..... 10-161-1Priority valve ........................................... 10-161-2Cooling fan motor ................................... 10-161-3Lubrication of work equipment ................ 10-162Work equipment linkage ........................... 10-164Bucket positioner and boom kick-out ...... 10-166Operation of proximity switch ................. 10-168Cab............................................................... 10-172ROPS canopy .............................................. 10-173Air conditioner ........................................... 10-174Electric circuit diagram.............................. 10-177Machine monitor system .......................... 10-178Main monitor .............................................. 10-180Maintenance monitor ................................ 10-186Multi monitor system (if equipped) ......... 10-187-1Engine starting circuit ............................... 10-188Engine stop circuit ..................................... 10-189Preheating circuit ....................................... 10-190Electric transmission control .................... 10-191Kick-down, hold switch ............................. 10-194Joystick steering system ........................ 10-194-1Transmission and

Joystick steering controller ............. 10-194-4AJSS (Advanced joystick

steering system) ............................... 10-194-6Transmission and

joystick steering controller ............ 10-194-10Electric parking brake control ................... 10-195Brake cooling system ................................ 10-20455°C specification ....................................... 10-214Emergency engine stop

(for Rio Tinto) ...................................... 10-218Hydraulic oil level sensor

(for Rio Tinto) ...................................... 10-221Battery and starter isolator,

battery jump start (for Rio Tinto) ...... 10-224

10-2 WA900-3

STRUCTURE AND FUNCTION POWER TRAIN

POWER TRAIN

OUTLINE• The power from engine (16) is transmitted

from the flywheel to damper (15) throughthe ring gear. The damper alleviates the tor-sional vibration caused by the variation ofthe engine torque and transmits the powerto torque converter (11) through upper driveshaft (14). The torque converter converts thedelivered torque according to the variationin load on the oil used as the medium, andtransmits the power to the input shaft oftransmission (10). Then, the engine power istransmitted to steering pump (12), mainpump (13), switch pump (17), and torqueconverter charging pump + PPC pump +brake pump (18) through the pump drivinggear in torque converter (11), thereby driv-ing the pumps.

• In transmission (10), the five hydraulically-operated clutches are operated by the for-ward-reverse spool and the speed changespools in the transmission valves, which arethemselves activated by solenoid valves.Thus, the desired travel speed can be se-lected from among the 3 forward and 3 re-verse gear speeds.

• The output shaft of transmission (10) trans-mits the power to the output shaft of trans-fer (9) through the gear. The power fromthe output shaft of the transfer is transmit-ted to both the front axle (5) and the rearaxle (21).In the front section of the chassis, the poweris transmitted to front axle (5) through centerdrive shaft (7) and front drive shaft (6).In the rear section, the power is transmittedto rear axle (21) through rear drive shaft(24).

• The power transmitted to front axle (5) andrear axle (21) is reduced through pinion andring gears in differential (22) and (1), and istransmitted to the axle shafts.

• The power from the axle shafts is reducedthrough final drive (19) and (3) and trans-mitted to wheel (20) and (4) through theplanetary carrier.

WA900-3 10-3

STRUCTURE AND FUNCTION POWER TRAIN SYSTEM

POWER TRAIN SYSTEM

20. Rear wheel21. Rear axle22. Rear differential23. Rear brake24. Rear drive shaft25. Center support26. Parking brake

1. Front differential2. Front brake3. Front final drive4. Front wheel5. Front axle6. Front drive shaft7. Center drive shaft8. Emergency steering pump9. Transfer

10. Transmission

11. Torque converter12. Steering pump13. Main pump14. Upper drive shaft15. Damper16. Engine17. Switch pump18. Torque converter charging pump (x 2)

+ PPC pump + brake pump19. Rear final drive