Komatsu WA380-7 » General Equipment & Supplies, Inc.

Komatsu WA380-7

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The Tier 4 interim WA380-7 will save you 10% on your fuel bill over the previous model. Two engine power modes, power and economy, let the operator match his work mode to the job at hand. The large capacity torque converter with enhanced lock-up gives the WA380-7 terrific digging power in the pile and climbing ability. Smart-loader Logic ensure that the WA380-7 works most efficiently under low demand conditions to ensure further energy and fuel savings.


Model   Komatsu SAA6D125E-6*
Type   Water-cooled, 4-cycle
Aspiration   Turbo-charged, after-cooled, cooled EGR
Number of cylinders   6
Bore x stroke 4.9" x 5.9" 125 mm x 150 mm
Piston displacement 674 in³ 11.04 ltr
Governor   all-speed, electronic
SAE J1995 - Gross 273 HP 204 kW
ISO 9249/SAE J1349 - Net 272 HP 203 kW
Rated rpm   2000 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
Torque converter:   3-elements, 1-stage, 2-phase
Transmission   Automatic full-powershift, countershaft type
Travel speed: (Measured with 26.5-25 tires) Forward Reverse
1st 4.7 mph  4.9 mph 
  7.6 km/h 7.9 km/h
2nd 8.1 mph  8.4 mph 
  13.1 km/h 13.5 km/h
2nd (Lock-up clutch ON) 8.2 mph  8.5 mph 
  13.2 km/h 13.7 km/h
3rd 14.2 mph  14.7 mph 
  22.9 km/h 23.6 km/h
3nd (Lock-up clutch ON) 14.7 mph 15.1 mph
  23.6 km/h 24.3 km/h
4th 22.5 mph  23.2 mph 
  36.2 km/h 37.3 km/h
4nd (Lock-up clutch ON) 23.8 mph 24.2 mph
  38.3 km/h 39.0 km/h
Axles and Final Drives    
Drive system   Four-wheel drive
Front   Fixed, semi-floating
Rear   Center-pin support, semi-floating, 26° 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
*May be used in an emergency    
Steering System    
Type   Articulated type, full-hydraulic power steering
Steering angle   35° each direction (40° to max end stop)
Minimum turning radius at the center of outside tire 21'9" 6630 mm
Hydraulic System    
Steering system:    
Hydraulic pump   Piston pump
Capacity 51.5 U.S. gal/min 195 ltr/min
Relief valve setting 3,555 psi 24.5 MPa / 250 kgf/cm²
Hydraulic cylinders:    
Type   Double-acting, piston type
Number of cylinders   2
Bore x stroke 3.5" x 17.3" 90 mm x 441 mm
Loader control:    
Hydraulic pump   Piston pump
Capacity 68.7 U.S. gal/min 260 ltr/min
Relief valve setting 4,980 psi 34.3 MPa / 350 kgf/cm²
Hydraulic cylinders:    
Type   Double-acting, piston type
Number of cylinders—bore x stroke:    
Boom cylinder — 2 5.5" x 30.0" 140 mm x 764 mm
Bucket cylinder — 1 6.3" x 22.6" 160 mm x 575 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   6.1 s
Dump   1.6 sec
Lower (Empty)   3.1 sec
Service Refill Capacities    
Cooling system 21.1 U.S. gal 80 ltr
Fuel tank 100.4 U.S. gal 380 ltr
Engine 10.0 U.S. gal 38 ltr
Hydraulic system 45.7 U.S. gal 173 ltr
Axle front 15.1 U.S. gal 57 ltr
Axle rear 14.8 U.S. gal 56 ltr
Torque converter and transmission 17.2 U.S. gal 65 ltr