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WA900-8
Purpose-built for mining and quarry
- Horsepower: 899 net HP @ 2,050 rpm
- Operating weight: 256,618 lbs.
- Bucket capacity: 15.0 - 19.0 yd³
Specifications
Engine
| Model | Komatsu SAA12V140E-7* |
| Type | Water-cooled, 4 cycle |
| Aspiration | Turbo-charged, after-cooled, cooled EGR |
| Number of cylinders | 12 |
| Bore x stroke | 5.51 x 6.50 in |
| Piston displacement | 1,860 in³ |
| Governor | all-speed, electronic |
| Flywheel horsepower | |
| SAE J1995 - Gross | 900 HP |
| ISO 9249/SAE J1349 - Net | 899 HP |
| Rated rpm | 2,050 rpm |
| Fan drive method for radiator cooling | Hydraulic |
| Fuel system | Direct injection |
| Lubrication system | |
| Method | Gear pump, force-lubrication |
| Filter | Full-flow type |
| Air cleaner | Dry type with double elements and dust evacuator, plus dust indicator |
*EPA Tier 4 Final emissions certified
Transmission
Torque converter: Three-elements, one-stage, one-phase
Transmission: Full-powershift, planetary type
| Travel Speed* | |
| 1st Forward | 4.7 mph |
| 1st Reverse | 4.9 mph |
| 2nd Forward | 7.7 mph |
| 2nd Reverse | 7.5 mph |
| 3rd Forward | 14.5 mph |
| 3rd Reverse | 15.0 mph |
*P-mode
Measured with 45/65-R45 tires
Axles & Final Drives
| Drive system | Four-wheel drive | |
| Front | Fixed, full-floating | |
| Rear | Center-pin support, full-floating, 20° total oscillation | |
| Reduction gear | Spiral bevel gear | |
| Differential gear | Conventional type | |
| Final reduction gear | Planetary gear, single reduction |
Brakes
| Service brakes | Hydraulically actuated, wet multiple-disc brakes actuate on four wheels |
| Parking brake | Wet multiple-disc brake |
Steering System
| Type | Articulated type, fully-hydraulic power steering |
| Steering angle | 40° each direction |
| Minimum turning radius at the center of outside tire | 32 ft. 5 in |
Hydraulic System
| Steering system: | |
| Hydraulic pump | Piston pump |
| Capacity / at rated rpm | 2 x 58.1 US gpm |
| Relief valve setting | 4,975 psi |
| Hydraulic cylinders: | |
| Type | Double-acting, piston type |
| Number of cylinders | 2 |
| Bore x stroke | 6.3 x 22.7 in |
| Work Equipment control: | |
| Hydraulic pump | Piston pump |
| Capacity / at rated rpm | 4 x 60.8 US gpm |
| Relief valve setting | 4,975 psi |
| Hydraulic cylinders: | |
| Type | Double-acting, piston type |
| Number of cylinders—bore x stroke: | |
| Boom cylinder - 2 | 10.2 x 58.9 in |
| Bucket cylinder - 1 | 11.8 x 39.2 in |
| 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 | 10.1 s |
| Dump | 2.9 s |
| Lower (Empty) | 4.8 s |
Service Refill Capacities
| Cooling system | 97.7 US gal |
| Fuel tank | 410.8 US gal |
| Engine | 31.7 US gal |
| Hydraulic system | 269.5 US gal |
| Axle (each front and rear) | 97.7 US gal |
| Torque converter and transmission | 47.6 US gal |
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