If you’re looking to load, transport or move material, Komatsu yard loaders offer a great combination of productivity, fuel efficiency, operator comfort and ease of maintenance. A newly designed, bigger bucket and auto-digging system helps maximize bucket fill while minimizing operator fatigue.
Tailor-made for loading in quarry environments that require a powerful engine and excellent stability, the WA500-8 yard loader has durable long life frames, axles and driveline components for efficient loading.
Reduced fuel costs*
* compared to the prior model
| Model | Komatsu SAA6D140E-7* |
| Type | Water-cooled, 4-cycle |
| Aspiration | Variable geometry turbo-charged, after-cooled, cooled EGR |
| Number of cylinders | 6 |
| Bore x Stroke | 140 x 165 mm |
| Piston displacement | 915.24 L |
| Governor | All-speed, electronic |
| Horsepower: | |
| SAE J1995 - Gross | 266 kW |
| ISO 9249 / SAE J1349 - Net | 263 kW |
| Rated rpm | 1 900 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 |
| Model | Komatsu SAA6D140E-7* |
| Type | Water-cooled, 4-cycle |
| Aspiration | Variable geometry turbo-charged, after-cooled, cooled EGR |
| Number of cylinders | 6 |
| Bore x Stroke | 5.51 x 6.50 in |
| Piston displacement | 930 in³ |
| Governor | All-speed, electronic |
| Horsepower: | |
| SAE J1995 - Gross | 357 HP |
| ISO 9249 / SAE J1349 - Net | 353 HP |
| Rated rpm | 1,900 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 |
Torque converter: three-elements, one-stage, two-phase
Transmission: Full-powershift, planetary type
| Travel speed: (Measured with 23.5-25 tires) | Forward | Reverse |
| 1st gear | 7.5 kph | 8.5 kph |
| 2nd gear | 12.9 kph | 12.9 kph |
| 2nd gear (Lock-up clutch ON) | 13.1 kph | 13.1 kph |
| 3rd gear | 22.2 kph | 24.7 kph |
| 3rd gear (Lock-up clutch ON) | 23.7 kph | 26.6 kph |
| 4th gear | 35.5 kph | 38.0 kph |
| 4th gear (Lock-up clutch ON) | 37.3 kph | 38.0 kph |
Torque converter: three-elements, one-stage, two-phase
Transmission: Full-powershift, planetary type
| Travel speed: (Measured with 23.5-25 tires) | Forward | Reverse |
| 1st gear | 4.7 mph | 5.3 mph |
| 2nd gear | 8.0 mph | 8.0 mph |
| 2nd gear (Lock-up clutch ON) | 8.1 mph | 8.1 mph |
| 3rd gear | 13.8 mph | 15.3 mph |
| 3rd gear (Lock-up clutch ON) | 14.7 mph | 16.5 mph |
| 4th gear | 22.1 mph | 23.6 mph |
| 4th gear (Lock-up clutch ON) | 23.2 mph | 23.6 mph |
| 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 |
| 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 |
| Service brakes | Hydraulically actuated, wet disc brakes actuate on four wheels |
| Parking brake | Wet disc brake |
| Emergency brake | Parking brake is commonly used |
| Service brakes | Hydraulically actuated, wet disc brakes actuate on four wheels |
| Parking brake | Wet disc brake |
| Emergency brake | Parking brake is commonly used |
| Type | Articulated type, full-hydraulic power steering |
| Steering angle | 36° each direction (40° to max end stop) |
| Minimum turning radius at the center of outside tire | 7 050 mm |
| Type | Articulated type, full-hydraulic power steering |
| Steering angle | 36° each direction (40° to max end stop) |
| Minimum turning radius at the center of outside tire | 23 ft. 2 in |
| Steering system: | |
| Hydraulic pump | Piston pump |
| Capacity at rated rpm | 120 L/min |
| Relief valve setting | 24.5 MPa / 250 kgf/cm² |
| Hydraulic cylinders: | |
| Type | Double-acting, piston type. |
| Number of cylinders | 2 |
| Bore x stroke | 100 x 486 mm |
| Loader control: | |
| Hydraulic pump | Piston pump |
| Capacity at rated rpm | 320 L/min |
| Relief valve setting | 34.3 MPa / 350 kgf/cm² |
| Hydraulic cylinders: | |
| Type | Double-acting, piston type. |
| Number of cylinders: | Bore x Stroke: |
| Boom cylinder / 2 | 160 x 898 mm |
| Bucket cylinder / 1 | 185 x 675 mm |
| Control valve | 2-spool type |
| Control positions: | |
| Boom | Raise, hold, lower, and float |
| Bucket | Tilt-back, hold, and dump |
| Hydraulic cycle time (rated load in bucket): |
|
| Raise | 7.2 s |
| Dump | 1.7 s |
| Lower (Empty) | 4.2 s |
| Steering system: | |
| Hydraulic pump | Piston pump |
| Capacity at rated rpm | 31.7 US gpm |
| Relief valve setting | 3,555 psi |
| Hydraulic cylinders: | |
| Type | Double-acting, piston type. |
| Number of cylinders | 2 |
| Bore x stroke | 3.9 x 19.1 in |
| Loader control: | |
| Hydraulic pump | Piston pump |
| Capacity at rated rpm | 84.8 US gpm |
| Relief valve setting | 4,980 psi |
| Hydraulic cylinders: | |
| Type | Double-acting, piston type. |
| Number of cylinders: | Bore x Stroke: |
| Boom cylinder / 2 | 6.3 x 35.4 in |
| Bucket cylinder / 1 | 7.3 x 26.6 in |
| Control valve | 2-spool type |
| Control positions: | |
| Boom | Raise, hold, lower, and float |
| Bucket | Tilt-back, hold, and dump |
| Hydraulic cycle time (rated load in bucket): |
|
| Raise | 7.2 s |
| Dump | 1.7 s |
| Lower (Empty) | 4.2 s |
| Cooling system | 110 L |
| Fuel tank | 473 L |
| Engine | 37 L |
| Hydraulic system | 337 L |
| Axle (each front and rear) | 95 L |
| Torque converter and transmission | 71 L |
| DEF tank | 36 L |
| Cooling system | 29.1 US gal |
| Fuel tank | 124.9 US gal |
| Engine | 9.8 US gal |
| Hydraulic system | 89.0 US gal |
| Axle (each front and rear) | 25.1 US gal |
| Torque converter and transmission | 18.8 US gal |
| DEF tank | 9.5 US gal |