Komatsu Wheel Loaders WA900-3

WA900-3 Wheel Loader

Power, stability and maneuverability. That's what you get with the 17.0 yd3, 856 hp, WA900-3. High stability when digging in the pile and when maneuvering, the WA900-3 is a production loader that can exceed your demands. Using the advanced joystick steering, the operator has the precise control and nimble feel to make him think he's operating a loader half its size.

Engine
Model		Komatsu SAA12V140E-3
Type		Water-cooled, 4 cycle
Aspiration		Turbocharged, air-to-air aftercooled
Number of cylinders		12
Bore x stroke	5.51'' x 6.50''	140 mm x 165 mm
Piston displacement	1,860 in³	30.48 ltr
Governor		all-speed, electronic
Flywheel horsepower
SAE J1995 - Gross	900 HP	672 kW
ISO 9249/SAE J1349 - Net	856 PS	638 kW
Rated rpm		2050 rpm
Fan drive method for radiator cooling		Mechanical
Fuel system		Direct injection
Lubrication system
Method		Gear pump, force-lubrication
Filter		Full-flow and bypass combined
Air cleaner		Dry type with automatic dust ejector and pre-cleaner, cyclopac with vacuator
EPA Tier 2 emissions certified.

Transmission
Torque converter - Type		3-element, single-stage, single-phase
Transmission - Type		Full-powershift, planetary type
Travel Speed*
1st Forward	4.3 mph	7.0 km/h
1st Reverse	4.4 mph	7.1 km/h
2nd Forward	7.6 mph	12.3 km/h
2nd Reverse	7.7 mph	12.4 km/h
3rd Forward	17.4 mph	28.0 km/h
3rd Reverse	17.6 mph	28.3 km/h
*Measured with 45/65-45, 58 PR (L-5)

Axles and Final Drives
Drive system		Four-wheel drive
Front		Fixed, full-floating
Rear		Center-pin support, full-floating, 22° total oscillation
Reduction gear		Spiral bevel gear
Differential gear		Straight bevel gear
Final reduction gear		Planetary gear, single reduction, oil bath

Brakes
Service brakes	Hydraulically actuated, wet disc brakes actuate on four wheels
Parking brake	Dry disc brake
Secondary brake	Parking brake is commonly used

Steering System
Type		Articulated type, full-hydraulic power steering
Steering angle		40° each direction
Minimum turning radius at the center of outside tire	30'2"	9200 mm

Hydraulic System
Steering system:
Hydraulic pump		Piston pump
Capacity / at rated rpm	83.2 U.S. gal/min	315 ltr/min
Relief valve setting	4,977 psi	34.3 MPa / 350 kgf/cm²
Hydraulic cylinders:
Type		Double-acting, piston type
Number of cylinders		2
Bore x stroke	6.3" x 19.8"	160 mm x 503 mm
Loader control:
Hydraulic pump		Piston pump
Capacity / at rated rpm	109.6 U.S. gal/min	415 ltr/min
Relief valve setting	4,977 psi	34.3 MPa / 350 kgf/cm²
Hydraulic cylinders:
Type		Double-acting, piston type
Number of cylindersÃ¢â‚¬â€bore x stroke:
Boom cylinder - 2	10.2" x 53.9"	260 mm x 1368 mm
Bucket cylinder - 1	11.8" x 35.7"	300 mm x 906 mm
Control valve		spool type
Control positions:
Boom		Raise, hold, lower, and float
Bucket		Tilt-back, hold, and dump
Hydraulic cycle time (rated load in bucket):
Raise		11.2 sec
Dump		2.0 sec
Lower (Empty)		4.8 sec

Service Refill Capacities

ROPS and Cab
The cab is mounted on viscous damping mounts and is well insulated.
Cooling system	89.0 U.S. gal	337 ltr
Fuel tank	410.8 U.S. gal	1555 ltr
Engine	34.3 U.S. gal	130 ltr
Hydraulic system	191.5 U.S. gal	725 ltr
Axle (each front and rear)	95.1 U.S. gal	360 ltr
Torque converter and transmission	37.0 U.S. gal	140 ltr