WA250PZ-6

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Engine   
Model    Komatsu SAA6D107E-1 
Type    Water-cooled, 4-cycle 
Aspiration    Turbocharged, aftercooled 
Number of cylinders   
Bore x stroke  4.21" x 4.88"  107 mm x 124 mm 
Piston displacement  408 in³  6.69 ltr 
Governor    All-speed, electronic 
Horsepower:     
SAE J1995 / Gross  140 HP  104 kW 
ISO 9249/SAE J1349 / Net  138 HP  103 kW 
Hydraulic fan at maximum speed / Net  134 HP  100 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 
EPA Tier 3 and EU Stage 3A emissions certified.     
 
Transmission   
Type . . . . . . . Hydrostatic, 1 pump, 2 motors with speed range select 
Travel speed
(Measured with 17.5-25 tires): 
  Both Forward and Reverse 
1st    2.2 - 7.3 mph
3.6 - 11.7 km/h 
2nd    7.3 mph
11.7 km/h 
3rd    10.1 mph
16.2 km/h 
4th    21.2 mph
34.2 km/h 
Travel speed
(Measured with 20.5-25 tires): 
  Both Forward and Reverse 
1st    2.5 - 8.1 mph
4.0 - 13.0 km/h 
2nd    8.1 mph
13.0 km/h 
3rd    11.2 mph
18.0 km/h 
4th    23.6 mph
38.0 km/h 
 
Axles and Final Drives   
Drive system    Four-wheel drive 
Front    Fixed, semi-floating 
Rear    Center-pin support, semi-floating, 24° total oscillation 
Reduction gear    Spiral bevel gear 
Differential gear    Torque proportioning 
Final reduction gear    Planetary gear, single reduction 
 
Brakes   
Service brakes    Hydraulically-actuated, wet disc brakes actuate on four wheels. 
Parking brake    Wet, multi-disc brake on transfer output shaft. 
Emergency brake    Parking brake is commonly used 
 
Steering System   
Type    Full-hydraulic power steering 
Steering angle    38° each direction (40° end stop) 
Minimum turning radius at the center of outside tire  17'0"  5175 mm 
 
Hydraulic System   
Steering system:     
Hydraulic pump    Gear type pump 
Capacity (at rated rpm)  29.1 U.S. gal/min  110 ltr/min 
Relief valve setting  2,700 psi  18.6 MPa
190 kgf/cm² 
Hydraulic cylinders:     
Type    Double-acting, piston type 
Number of cylinders   
Bore x stroke  2.8" x 17.8"  70 mm x 453 mm 
Loader control:     
Hydraulic pump    Gear type pump 
Capacity  20.6 U.S. gal/min  78 ltr/min 
Relief valve setting  3,000 psi  20.6 MPa
210 kgf/cm² 
Hydraulic cylinders:     
Type    Double-acting, piston type 
Number of cylinders  bore x stroke  bore x stroke 
Boom cylinder - 2  5.1" x 28.2"  130 mm x 717 mm 
Bucket cylinder - 1  5.9" x 19.3"  150 mm x 491 mm 
Control valve    3-spool type 
Control positions:     
Boom    Raise, hold, lower, and float 
Bucket    Tilt-back, hold, and dump 
Hydraulic cycle time (rated load in bucket)     
Raise    5.7 sec 
Dump    1.6 sec 
Lower (Empty)    3.3 sec 
 
Service Refill Capacities   
Cooling system  5.8 U.S. gal  22 ltr 
Fuel tank  49.1 U.S. gal  186 ltr 
Engine  6.1 U.S. gal  23 ltr 
Hydraulic system  17.7 U.S. gal  67 ltr 
Axle (each, front and rear)  4.8 U.S. gal  18 ltr 
Transfer  1.3 U.S. gal  5 ltr 

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