Komatsu WA270-8 Wheel Loader

Komatsu WA270-8 Wheel Loader

Operating Weight
Rated power 115 kW 153 HP
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Heavy-duty After Treatment System

This new system combines a Komatsu Diesel Particulate Filter (KDPF) and Selective Catalytic Reduction (SCR).  The SCR NOx reduction system injects the precise amount of Diesel Exhaust Fluid (DEF) to break down NOx into non-toxic water vapor (H2O) and nitrogen gas (N2).

After Treatment System  

Hydrostatic Transmission

The HST provides quick travel response and aggressive drive into the pile. Full auto-shifting eliminates any gear shifting and kick-down operation to allow the operator to concentrate on the digging and loading.  The HST also acts as a dynamic brake to slow the loader.  This dramatically extends the life of the wet disc brakes.


Variable Traction Control System

The variable traction control system is designed to adjust   the traction control for each working condition.  S-mode reduces tire spin in slippery or snowy conditions. Auto-mode automatically optimizes the tractive effort for various working conditions.  Max traction provides the full, 100%, tractive effort.

WA320-8  

Creep Mode

Creep mode limits the travel speed in 1st speed range, while still allowing for full hydraulic flow.

WA320-8  

New Operator Seat

A new standard, heated, air-suspension seat provides enhanced support on rough roads and dampens machine vibrations, providing a more   comfortable ride for the operator. The angle of the armrest is fully   adjustable for optimum operator comfort. A secondary F-N-R switch is incorporated into the standard multi-function mono lever.

WA320-8  

Standard Rear View Monitoring System

The dedicated full-color monitor on the right side of the cab provides the operator with a rear view from the machine. This  monitor can be always on or only on when the loader shifts into reverse. Guidelines provide the operator with visual  cues for the width of the loader.

WA320-8  

Multi-Function Mono Lever

The multi-function mono lever with EPC control for 3rd spool is standard. It includes a forward-neutral-reverse switch for quick and easy travel. Third spool attachments can be set to continual or proportional control via the  monitor panel allowing the operator to control the boom, bucket and attachment all with a single lever.

WA320-8  

Engine

Model
Komatsu SAA6D107E-3*
Type
Water-cooled, 4-cycle
Aspiration
Variable geometry turbo-charged, after-cooled, cooled EGR
Number of cylinders
6
Bore x stroke107 mm x 124 mm4.21" x 4.88"
Piston displacement6.69 ltr408 in³
Governor
All-speed, electronic
Horsepower:

Gross - SAE J1995115 kW153 HP
Net - ISO 9249/SAE J1349111 kW
149 HP
Rated rpm
2000 rpm
Max power - ISO 14396 @ 1650 rpm111 kW149 HP
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 Final emissions certified

Transmission

Transmission: Hydrostatic, 1 pump, 2 motors with speed range select

Travel Speed:ForwardReverse
1st1.0 - 13.0 km/h
0.6 - 8.1 mph
1.0 - 13.0 km/h
0.6 - 8.1 mph
2nd

13.0 km/h
8.1 mph

13.0 km/h
8.1 mph
3rd19 km/h
11.8 mph
19 km/h
11.8 mph
4th38.0 km/h
23.6 mph
38.0 km/h
23.6 mph

Measured with 20.5-R25 tires

Axles and Final Drives

Drive systemFour-wheel drive
FrontFixed, semi-floating
RearCenter-pin support, semi-floating, 24° total oscillation
Reduction gearSpiral bevel gear
Differential gearTorque proportioning
Final reduction gearPlanetary gear, single reduction

Brakes

Service brakesHydraulically actuated, wet disc brakes actuate on four wheels
Parking brakeWet, multi-disc brake on transfer output shaft
Secondary brakeParking 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)150 ltr/min39.6 U.S. gal/min
Relief valve setting20.6 MPa
210 kgf/cm²
3,000 psi
Hydraulic cylinders:

Type
Double-acting, piston type
Number of cylinders
2
Bore x stroke70 mm x 453 mm2.76" x 17.8"
Loader control:

Hydraulic pump
Piston pump, in common with steering system
Capacity (at rated rpm)150 ltr/min39.6 U.S. gal/min
Relief valve setting31.4 MPa
320 kg/cm²
4,554 psi
Hydraulic cylinders:

Type
Double-acting, piston type
Number of cylinders:bore x stroke:bore x stroke:
Lift cylinder / 2110 mm x 717 mm4.3" x 28.2"
Bucket cylinder / 1140 mm x 480 mm5.5" x 18.9"
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
6.0 sec
Dump
2.0 sec
Lower (empty)
3.2 sec

Service Refill Capacities

Cooling system33.3 ltr8.8 U.S. gal
Fuel tank186 ltr49.1 U.S. gal
Engine23 ltr6.1 U.S. gal
Hydraulic system80 ltr21.1 U.S. gal
Axle front18.5 ltr4.9 U.S. gal
Axle rear18 ltr4.8 U.S. gal
Transfer case7 ltr1.8 U.S. gal
DEF tank14 ltr3.7 U.S. gal

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