WA320-7

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Engine   
Model    Komatsu SAA6D107E-2* 
Type    Water-cooled, 4-cycle 
Aspiration    Turbo-charged, after-cooled, cooled EGR 
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:     
Gross - SAE J1995  170 HP  127 kW 
Net - ISO 9249/SAE J1349  165 HP  123 kW 
Rated rpm    2100 rpm 
Max power - ISO 14396 @ 1900 rpm  169 HP  126 kW 
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 Interim and EU stage 3B emissions certified     
Transmission   
Transmission    Hydrostatic, 1 pump, 2 motors with speed range select 
Travel Speed:  Forward  Reverse 
1st  0.6 - 8.1 mph  0.6 - 8.1 mph 
2nd  8.1 mph  8.1 mph 
3rd  11.6 mph  11.6 mph 
4th  23.6 mph  23.6 mph 
Measured with 20.5-25 tires     
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    Articulated type, fully-hydraulic power steering 
Steering angle    38.5° each direction (40° to max end stop) 
Minimum turning radius at the center of outside tire  17'8"  5380 mm 
Hydraulic System   
Steering system:     
Hydraulic pump    Piston pump, in common with loader control 
Capacity (at rated rpm)  47.6 U.S. gal/min  180 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  2.76" x 17.8"  70 mm x 453 mm 
Loader control:     
Hydraulic pump    Piston pump, in common with steering system 
Capacity (at rated rpm)  47.6 U.S gal/min  180 ltr/min 
Relief valve setting  4,410 psi  310 kg/cm²
30.4 MPa 
Hydraulic cylinders:     
Type    Double-acting, piston type 
Number of cylinders:  bore x stroke:  bore x stroke: 
Boom cylinder / 2  4.7" x 28.7"  120 mm x 729 mm 
Bucket cylinder / 1  5.9" x 22"  150 mm x 558 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 sec 
Dump    1.9 sec 
Lower (empty)    3.5 sec 
Service Refill Capacities   
Cooling system  7.4 U.S. gal  28 ltr 
Fuel tank  64.7 U.S. gal  245 ltr 
Engine  6.1 U.S. gal  23 ltr 
Hydraulic system  23.7 U.S. gal  90 ltr 
Axle front  7.1 U.S. gal  27 ltr 
Axle rear  6.7 U.S. gal  25.5 ltr 
Transfer case  1.5 U.S. gal  5.8 ltr 

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