Komatsu WA270-8 MID-SIZE WHEEL LOADERS
Product Feature
Creep Mode
Creep mode limits the travel speed in 1st speed range, while still allowing for full hydraulic flow.
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).
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.
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.
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.
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.
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.
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 |
| Secondary brake | Parking brake is commonly used |
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 stroke | 107 mm x 124 mm | 4.21" x 4.88" |
| Piston displacement | 6.69 ltr | 408 in³ |
| Governor | All-speed, electronic | |
| Horsepower: | ||
| Gross - SAE J1995 | 115 kW | 153 HP |
| Net - ISO 9249/SAE J1349 | 111 kW |
149 HP |
| Rated rpm | 2000 rpm | |
| Max power - ISO 14396 @ 1650 rpm | 111 kW | 149 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 |
Hydraulic System
| Steering system: | ||
| Hydraulic pump | Piston pump, in common with loader control | |
| Capacity (at rated rpm) | 150 ltr/min | 39.6 U.S. gal/min |
| Relief valve setting | 20.6 MPa 210 kgf/cm² |
3,000 psi |
| Hydraulic cylinders: | ||
| Type | Double-acting, piston type | |
| Number of cylinders | 2 | |
| Bore x stroke | 70 mm x 453 mm | 2.76" x 17.8" |
| Loader control: | ||
| Hydraulic pump | Piston pump, in common with steering system | |
| Capacity (at rated rpm) | 150 ltr/min | 39.6 U.S. gal/min |
| Relief valve setting | 31.4 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 / 2 | 110 mm x 717 mm | 4.3" x 28.2" |
| Bucket cylinder / 1 | 140 mm x 480 mm | 5.5" 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 system | 33.3 ltr | 8.8 U.S. gal |
| Fuel tank | 186 ltr | 49.1 U.S. gal |
| Engine | 23 ltr | 6.1 U.S. gal |
| Hydraulic system | 80 ltr | 21.1 U.S. gal |
| Axle front | 18.5 ltr | 4.9 U.S. gal |
| Axle rear | 18 ltr | 4.8 U.S. gal |
| Transfer case | 7 ltr | 1.8 U.S. gal |
| DEF tank | 14 ltr | 3.7 U.S. gal |
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 |
Transmission
Transmission: Hydrostatic, 1 pump, 2 motors with speed range select
Product Parameter
| 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 |
| Service brakes | Hydraulically actuated, wet disc brakes actuate on four wheels |
| Parking brake | Wet, multi-disc brake on transfer output shaft |
| Secondary brake | Parking brake is commonly used |
| Model | Komatsu SAA6D107E-3* | |
| Type | Water-cooled, 4-cycle | |
| Aspiration | Variable geometry turbo-charged, after-cooled, cooled EGR | |
| Number of cylinders | 6 | |
| Bore x stroke | 107 mm x 124 mm | 4.21" x 4.88" |
| Piston displacement | 6.69 ltr | 408 in³ |
| Governor | All-speed, electronic | |
| Horsepower: | ||
| Gross - SAE J1995 | 115 kW | 153 HP |
| Net - ISO 9249/SAE J1349 | 111 kW |
149 HP |
| Rated rpm | 2000 rpm | |
| Max power - ISO 14396 @ 1650 rpm | 111 kW | 149 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 |
| Steering system: | ||
| Hydraulic pump | Piston pump, in common with loader control | |
| Capacity (at rated rpm) | 150 ltr/min | 39.6 U.S. gal/min |
| Relief valve setting | 20.6 MPa 210 kgf/cm² |
3,000 psi |
| Hydraulic cylinders: | ||
| Type | Double-acting, piston type | |
| Number of cylinders | 2 | |
| Bore x stroke | 70 mm x 453 mm | 2.76" x 17.8" |
| Loader control: | ||
| Hydraulic pump | Piston pump, in common with steering system | |
| Capacity (at rated rpm) | 150 ltr/min | 39.6 U.S. gal/min |
| Relief valve setting | 31.4 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 / 2 | 110 mm x 717 mm | 4.3" x 28.2" |
| Bucket cylinder / 1 | 140 mm x 480 mm | 5.5" 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 |
| Cooling system | 33.3 ltr | 8.8 U.S. gal |
| Fuel tank | 186 ltr | 49.1 U.S. gal |
| Engine | 23 ltr | 6.1 U.S. gal |
| Hydraulic system | 80 ltr | 21.1 U.S. gal |
| Axle front | 18.5 ltr | 4.9 U.S. gal |
| Axle rear | 18 ltr | 4.8 U.S. gal |
| Transfer case | 7 ltr | 1.8 U.S. gal |
| DEF tank | 14 ltr | 3.7 U.S. gal |
| 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 |
| Travel Speed: | Forward | Reverse |
| 1st | 1.0 - 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 |
13.0 km/h 8.1 mph |
| 3rd | 19 km/h 11.8 mph |
19 km/h 11.8 mph |
| 4th | 38.0 km/h 23.6 mph |
38.0 km/h 23.6 mph |
