Komatsu WA900-3

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Features

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.

Specifications

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
     
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
     
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 cylinders—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

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