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Komatsu Wheel Loaders WA270-7

Komatsu Wheel Loaders WA270-7
WA270-7 Wheel Loader

The Komatsu Tier 4 interim technology on the WA270-7 is designed to keep the operator working rather than having to stop and regenerate while saving up to 10% on fuel burned. The hydrostatic drive system on the WA270-7 gives the operator quick and powerful response, self-braking effect of dynamic braking and traction control. A multi-function mono-lever, rearview camera system with separate screen and heated, air ride suspension seat give the operator a comfortable and ergonomic work environment.

Engine
Model Komatsu SAA6D107E-2*
Type Water-cooled, 4-cycle
Aspiration Turbo-charged, after-cooled, cooled EGR
Number of cylinders 6
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 153 HP 115 kW
Net - ISO 9249/SAE J1349 149 HP 111 kW 149 HP
Rated rpm 2000 rpm
Max power - ISO 14396 @ 1900 rpm 150 HP 112 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 11.8 mph 11.8 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, 20° 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° each direction (40° to max end stop)
Minimum turning radius at the center of outside tire 17' 0" 5175 mm
Hydraulic System
Steering system:
Hydraulic pump Piston pump, in common with loader control
Capacity (at rated rpm) 39.6 U.S. gal/min 150 ltr/min
Relief valve setting 3,000 psi 20.6 MPa 210 kgf/cm²
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders 2
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) 39.6 U.S. gal/min 150 ltr/min
Relief valve setting 4,555 psi 320 kg/cm² 31.4 MPa
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders bore x stroke: bore x stroke:
Boom cylinder / 2 4.3" x 28.2" 110 mm x 717 mm
Bucket cylinder / 1 5.5" x 18.9" 140 mm x 480 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 5.7 sec
Dump 2.0 sec
Lower (Empty) 3.2 sec
Service Refill Capacities
Cooling system 7.4 U.S. gal 28 ltr
Fuel tank 49.1 U.S. gal 186 ltr
Engine 6.7 U.S. gal 23 ltr
Hydraulic system 20.6 U.S. gal 78 ltr
Axle front 4.9 U.S. gal 18.5 ltr
Axle rear 4.8 U.S. gal 18 ltr
Transfer 2.1 U.S. gal 7 ltr

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