WA470-6

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Engine   
Model    Komatsu SAA6D125E-5* 
Type    Water-cooled, 4-cycle 
Aspiration    Turbocharged, aftercooled, cooled EGR 
Number of cylinders   
Bore x stroke  4.9" x 5.9"  125 mm x 150 mm 
Piston displacement  674 in³  11.04 ltr 
Governor    all-speed, electronic 
Horsepower:     
SAE J1995 - Gross  273 HP  204 kW 
ISO 9249/SAE J1349 - Net  272 HP  203 kW 
Hydraulic fan at maximum speed - Net  256 HP  191 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   
Torque converter:     
Type    3-element, single-stage, single-phase 
Transmission:     
Type    Full-powershift, contershaft type 
Travel speed: (Measured with 26.5-25 tires)  Forward  Reverse 
1st  4.7 mph
7.6 km/h 
4.9 mph
7.9 km/h 
2nd  8.1 mph
13.1 km/h 
8.4 mph
13.5 km/h 
3rd  14.2 mph
22.9 km/h 
14.7 mph
23.6 km/h 
4th  22.5 mph
36.2 km/h 
23.2 mph
37.3 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 
 
Brakes   
Service brakes    Hydraulically actuated, wet disc brakes actuate on four wheels 
Parking brake    Wet disc brake 
Emergency brake    Parking brake is commonly used 
 
Steering System   
Type    Articulated type, full-hydraulic power steering 
Steering angle    35° each direction (40° end stop) 
Minimum turning radius at the center of outside tire  21'9"  6630 mm 
 
Hydraulic System   
Steering system:     
Hydraulic pump    Piston pump 
Capacity at rated rpm  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   
Bore x stroke  3.5" x 17.3"  90 mm x 441 mm 
     
Loader control:     
Hydraulic pump    Piston pump 
Capacity at rated rpm  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    5.4 sec 
Dump    1.6 sec 
Lower (Empty)    3.7 sec 
 
Service Refill Capacities   
Cooling system  16.1 U.S. gal  61 ltr 
Fuel tank  109.1 U.S. gal  413 ltr 
Engine  10.0 U.S. gal  38 ltr 
Hydraulic system  45.7 U.S. gal  173 ltr 
Axle front  15.9 U.S. gal  60 ltr 
Axle rear  14.8 U.S. gal  56 ltr 
Torque converter and transmission  17.2 U.S. gal  65 ltr 

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