• 477,100 - 486,250 lbs Operating Weight
  • 1,765 @1800 rpm Horsepower
  • 23.5 - 45.8 yd³ Bucket Capacity


26.2 yd³. 1765 hp. Incredible numbers for Komatsu’s largest, most productive wheel loader, the WA1200-6. From the low vibration cab the operator uses his advanced joystick control and modulated clutch drive system to maneuver in tight areas to load trucks up to 320 ton capacity. High stability and breakout force give the operator the confidence he needs to keep up with the production demands of today’s mines.


Advanced Joystick Steering System

AJSS is a feedback steering system which has been incorporated to allow steering, forward and reverse direction to be controlled by wrist and finger. With the feedback function, the machine steering angle is the same angle as the lever tilt angle.

2 Mode Control of Engine

The engine output function has "2 modes", Economy or Power. They are selected and controlled automatically. P mode is selected only when digging and approaching the dump truck. This "2 mode" engine control contributes to the reduction of the fuel rate and also improves reliability and durability.

Equipment Management Monitoring System

Monitor is mounted in front of the operator for easy viewing, allowing the operator to easily check gauges and warning lights.

Excellent Stability

The WA1200-6 has the widest tread in its class

14'1'' / 4,300 mm and a long 23'4'' / 7,100mm wheelbase, for maximum machine stability.

Static tipping load

(with 60/80 R57 tires / bucket 26.2 yd³ / 20.0 m³)

Straight: 268,800 lb / 121930 kg

40° full turn: 236,000 lb / 107060 kg


To enhance loading performance when using large buckets with extra dumping clearance and reach, the hi-cab is standard equipment. From the operator vantage point, 6380 mm / 20'11" from the ground, the seated operator has an unobstructed full view of the bucket and the inside of a 240-ton truck body.

High Breakout Force / Traction Force

Komatsu wheel loaders have high-tensile steel Z-bar loader linkages for maximum rigidity and maximum breakout force. Sealed loader linkage pins extend greasing intervals.

Breakout force:

286,600 lb / 1275 kN 130000 kg 

26.2 yd³ / 20.0 m³  Rock bucket (spade nose with teeth)

Traction force:

223,100 lb / 992 kN 101200 kg 

High-rigidity Frames and Loader Linkage

The front, rear frames and the loader linkage have increased torsional rigidity for stress resistance. Frame and loader linkage are designed and computer tested for proven strength to accommodate actual working loads.

Maximum speed control

With the "VEHICLE SPEED DIAL", you can set the maximum vehicle speed of 1st. and 2nd. at any level from 3km/h 2 mph to max. This means the operator can adjust the cycle time between the material and the dump truck. As the loading cycle time is shortened, productivity is improved.

Maximum traction control

Traction can be set at any level within 20 - 100% with the "TRACTION CONTROL DIAL" located on the left front of the dash. You can set the maximum traction force according to the condition of the road, material and type of work. This can greatly increase fuel efficiency and extend the service life of tires.

Modulated Clutch System

When approaching the dump truck,

1) The modulated clutch is controlled automatically to raise the bucket faster, while reducing forward travel speed. This reduction in travel speed reduces the braking requirement and the time to approach the dump truck is shortened.

2) This combination also reduces torque loss and smooths the operation.

The Largest Bucket in Its Class

The WA1200-6 is equipped with the largest bucket in its class at 20.0 m³ / 26.2 yd³. Komatsu’s bucket is designed for easy loading with little spillage. This, combined with the highest traction and breakout force available, makes a loader which achieves high bucket fill factors and maximum production.

Trainer Seat

A trainer seat is provided for operator instruction. The seat belt is attached to the trainer seat the same way as the operator seat. The trainer seat can be folded up when not in use.


Axles and Final Drives

Drive system Four-wheel drive
Front Fixed, full floating
Rear Center-pin support, full-floating, 16˚ total oscillation
Reduction gear Spiral bevel gear
Differential gear Straight bevel gear
Final reduction gear Planetary gear, double reduction, oil bath


Service brakes Hydraulically actuated, wet, multi-disc brakes actuated on four wheels.
Parking brake Wet, multi-disc, hydraulically-released, spring applied in the transmission.
Secondary brake Parking brake is commonly used

Bucket Controls

Control positions:
Boom Raise, hold, lower, and float
Bucket Tilt-back, hold, and dump


Model Komatsu SDA16V160E-2
Type Water-cooled, 4-cycle
Aspiration Turbocharged and aftercooled
Number of cylinders 16
Bore x stroke 6.26'' x 7.48'' 159 mm x 190 mm
Piston displacement 3,661 in³ 60 ltr
Governor Electronic fuel control
Flywheel horsepower:
SAE J1995 - Gross 1892 HP 1411 kW
ISO 9249/SAE J1349 - Net 1765 HP 1316 kW 1765 hP
Rated rpm 1800 rpm
Fan drive method for radiator cooling Mechanical
Fuel system Modular common rail system direct injection
Lubrication system:
Method Screw pump, forced lubrication
Filter Full-flow
Air cleaner Dry-type with double elements and automatic dust evacuation with dust indicator on monitor

Hydraulic System

Rated capacity (discharge flow) @1800 engine rpm
Loader pump 269 gal/min 1018 ltr/min
Steering pump 167 gal/min 633 ltr/min
Switch pump 167 gal/min 633 ltr/min
Relief valve setting 4,550 psi 31.4 MPa 320 kg/cm²
Control valves A double spool closed-center hydraulic valve and a steering valve combined with a demand valve to provide optimum flow.
Hydraulic cylinders/Number of cylinders Bore x stroke: Bore x stroke:
Boom/2 14.2'' x 72.2'' 360 mm x 1835 mm
Bucket/2 11.8'' x 38.8" 300 mm x 985 mm
Steering/2 8.9'' x 26.0'' 225 mm x 660 mm
Control positions:
Boom Raise, hold, lower, and float
Bucket Tilt-back, hold, and dump
Hydraulic cycle time (rated load in bucket):
Raise 14.8 sec
Dump 3.2 sec
Lower (empty) 5.3 sec

OPS FOPS Level 2 Cab

The cab is mounted on viscous damping mounts and is well insulated.

Service Refill Capacities

Cooling system 132 U.S. gal 500 ltr
Fuel tank 1,347 U.S. gal 5100 ltr
Engine 74 U.S. gal 280 ltr
Hydraulic system 343 U.S. gal 1300 ltr
Differential, final drive (each axle) 177 U.S. gal 670 ltr
Torque converter and transmission 92 U.S. gal 350 ltr
Brake oil 20 U.S. gal 75 ltr
Brake cooling 77 U.S. gal 290 ltr

Steering System

Type Articulated, fully-hydraulic power steering
Steering angle 40° each direction
Turning radius outside corner of bucket and teeth 47'0" 14330 mm


Select proper tires based on job requirements.
Standard rim size 47.00-57/5.0
Standard tire size 60/80 R57


Torque converter - Type 3-element, single-stage, single-phase
Transmission - Type Full power shift, planetary gear with modulated clutch
Travel Speed (Measured with 60/80 R57 tires):
1st Forward 3.8 mph 6.1 km/h
1st Reverse 3.9 mph 6.3 km/h
2nd Forward 6.9 mph 11.1 km/h
2nd Reverse 7.1 mph 11.4 km/h
3rd Forward 11.6 mph 18.7 km/h
3rd Reverse 12.0 mph 19.3 km/h


  • 2-spool valve for boom and bucket controls
  • Alternator, 140 A/24 V
  • AM/FM radio
  • Air conditioner, heater, defroster & pressurizer
  • Automatic greasing system
  • Automatic transmission F3 / R3
  • Axles, full floating
  • Back-up alarm
  • Back-up light
  • Batteries, 160 Ah/12 V x 6
  • Battery disconnect switch
  • Boom kick-out, automatic and adjustable
  • Brakes:
  • --Secondary brake
  • --Parking: wet, multiple-disc
  • --Service: wet, multiple-disc
  • Bucket positioner
  • Cab with ROPS/FOPS Level 2 canopy
  • Converter, 2.5 amps 12 volt
  • Counterweight
  • Dual-mode active working system
  • Electronic display/Multi Monitor
  • Manual engine stop switches
  • Supplemental steering (SAE)
  • Engine, Komatsu SDA16V160E-2 diesel
  • Engine pre-lube system
  • EPC fingertip control levers with automatic leveler and positioner
  • Fenders, front and left rear
  • Fire extinguisher
  • Floor mat
  • Fog lamps
  • Hard water area arrangement (corrosion resister)
  • Horn, electric
  • KOMTRAX Plus
  • Lights
  • --Backup light
  • --Head lights (4 front)
  • --Stop and tail
  • --Turn signal with hazard switch (2 front, 2 rear)
  • --Working lights (6 front, 8 rear)
  • --Access stairs and service area light
  • Load meter
  • Power train guard
  • Power windows
  • Radiator core protective grid
  • Rear access stairs
  • Rearview mirror and rear underview mirror mounted to radiator guard
  • Room mirror
  • Seat belt, 76 mm / 3" with retractor
  • Seat, air suspension with reclining
  • Service center
  • Starting motor, 9.0 kW/24 V x 2
  • Steering, full hydraulic power (joystick steering control)
  • Sun visor
  • Tinted glass
  • Tire Saver® (modulation clutch controlled)
  • Trainer seat
  • Vandalism protection kit
  • Water separator
  • Wiggins fast fuel fill
  • Wiggins fast oil fill
  • Window washer, front and rear
  • Wipers, front and rear, front intermittent



  • 6200 mm / 20'4" boom
  • 6780 mm / 22'2" boom


  • 18.0 m³ / 23.5 yd³ spade nose rock
  • 20.0 m³ / 26.2 yd³ spade nose rock
  • 35.0 m³ / 45.8 yd³ coal  


  • 47.00-57/5.0
  • 47.00-57/6.0


  • Front fender handrails
  • Hensley teeth
  • LED turn signal 
  • Yellow rotating lamp