• 122,136 - 126,678 lbs Operating Weight
  • 529 @1800 rpm Horsepower
  • 8.4 - 10.2 yd³ Bucket Capacity


Equipped with an EPA Tier 4 Final certified engine, the WA600-8 combines an enhanced lockup torque converter function and SmartLoader logic to achieve low fuel consumption and high travel speeds.

By optimizing control of engine power, and improving power train and hydraulic efficiency, the WA600-8 consumes up to 13 percent less fuel than its Tier 3 predecessor. Also, the standard bucket capacity increased to 9.2 cubic yards and the bucket now fills easier, retains material better and provides better visibility, contributing to machine efficiency and productivity.

WA600-8 Walkaround  >


High Resolution 7-inch Color LCD Monitor

The machine monitor displays various machine information and allows for various settings of the machine. The LCD monitor is a 7-inch color LCD and displays maintenance information, operation records, ecology guidance records, etc. The switch panel is used to select various screens and the air conditioner control screen. By using the switch panel, you can display various user menus on the LCD screen and adjust machine settings.

Komatsu SmartLoader Logic

The WA600-8 provides Komatsu SmartLoader Logic, an engine control system. This technology creates the right amount of torque for each work phase. For example, engine torque needs are higher for digging in V-shape loading, but less when driving with an empty bucket. This system optimizes the engine torque for all applications to minimize fuel consumption. Komatsu SmartLoader Logic functions automatically and doesn’t interfere with operation, saving fuel without decreasing production.

Komatsu's New Emission Regulationscompliant Engine

New regulations effective in 2014 require the reduction of NOx emissions to one tenth or below from the preceding regulations. In addition to refining the Tier 4 Interim technologies, Komatsu has developed a new selective catalytic reduction (SCR) device in-house.

Komatsu Variable Geometry Turbocharger (KVGT) system

The KVGT system features Komatsu designed hydraulic technology for variable control of airflow and supplies optimal air according to load conditions. The upgraded version provides better exhaust temperature management.

Low Fuel Consumption

By optimally controlling engine power and creating a high efficiency power train and hydraulic system, new features on the WA600-8 reduce fuel consumption, while enhancing fuel efficiency.

Fuel consumption reduced by up to 13% in Economy mode

*Compared with the WA600-6, fuel consumption varies depending on working conditions.

New Operator Seat with Electronic Pilot Control (EPC) Levers

A new heated, air suspension seat provides enhanced support on rough roads and dampens machine vibrations, providing a more comfortable ride for the operator. An EPC lever console and advanced joystick steering lever are integrated in, and move with, the seat. The angle of the armrest is fully adjustable for optimum operator comfort.

Rear View Monitoring System

The operator can view the rear of the machine with a full color monitor that is located on the right side of the cab. This monitor can be always on or only on when the loader goes into reverse. Visual guidelines can also be added for more convenience.

Side-Opening Engine Doors

A wide access area makes daily maintenance easy. Large steps are provided on each side of the frame for added convenience.

Swing-out Type Cooling Fan and Wide Core Radiator

The cooling fan swings out for easy cleaning. The coolers feature wide spacing of the cooling fins to reduce clogging.


Axles and Final Drives

Drive system Four-wheel drive
Front Fixed, full-floating
Rear Center-pin support, full-floating, 22° total oscillation
Reduction gear Spiral bevel gear
Differential gear Conventional type
Final reduction gear Planetary gear, single reduction


Service brakes: Hydraulically actuated, wet multiple-disc brakes actuate on four wheels
Parking brake: Wet multiple-disc brake
Emergency brake One of dual service brake circuits is commonly used


Model Komatsu SAA6D170E-7*
Type Water-cooled, 4-cycle
Aspiration Komatsu variable geometry, turbo-charged, after-cooled, cooled EGR
Number of cylinders 6
Bore x stroke 170 mm x 170 mm 6.69" x 6.69"
Piston displacement 23.15 ltr 1413 in³
Governor All-speed, electronic
SAEJ1995 - Gross 396 kW 530 HP
ISO 9249 / SAEJ1349 - Net 395 kW 529 HP
Rated rpm 1800 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 4 Final emissions certified

Hydraulic System

Steering system:
Hydraulic pump Piston pump
Capacity (at rated rpm) 163 ltr/min 43.1 U.S. gal/min
Relief valve setting 34.3 MPa 350 kgf/cm² 4,980 psi
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders 2
Bore x stroke 100 mm x 486 mm 4.5" x 20"
Loader control:
Hydraulic pump Piston pump
Capacity at rated rpm 239 + 239 ltr/min 63.1 + 63.1 U.S. gal/min
Relief valve setting 34.3 MPa 350 kgf/cm² 4,980 psi
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders: Bore x Stroke Bore x Stroke
Boom cylinder / 2 200 mm x 1067 mm 7.9" x 42"
Bucket cylinder / 1 225 mm x 776 mm 8.9" x 30.6"
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 8.7 sec
Dump 2.3 sec
Lower (Empty) 4.1 sec

Service Refill Capacities

Cooling system 150 ltr 39.6 U.S. gal
Fuel tank 718 ltr 189.7 U.S. gal
Engine 86 ltr 22.7 U.S. gal
Hydraulic system 443 ltr 117.0 U.S. gal
Axle (front) 185 ltr 48.9 U.S. gal
Axle (rear) 193 ltr 51.0 U.S. gal
Torque converter and transmission 78 ltr 20.6 U.S. gal
DEF tank 39.7 ltr 10.5 U.S. gal

Steering System

Type Articulated type, full-hydraulic power steering
Steering angle 43° each direction.
Minimum turning radius at the center of outside tire 7075 mm 23'3"


Torque converter Type three-elements, one-stage, two-phase
Transmission Type Automatic full-powershift, planetary type
Travel speed measured with 35/65-33 tires: Forward* Reverse*
1st 6.7 km/h 4.2 mph 7.3 km/h 4.5 mph
2nd 11.7 km/h 7.3 mph
(12.4 km/h 7.7 mph)
12.8 km/h 8.0 mph
(13.5 km/h 8.4 mph)
3rd 20.3 km/h 12.6 mph
(21.7 km/h 13.5 mph)

22.0 km/h 13.7 mph
(23.7 km/h 14.7 mph)


33.8 km/h 21.0 mph
(37.7 km/h 23.4 mph)

37.0 km/h 23.0 mph
(41.0 km/h 25.5 mph)

 ( ): Lock-up clutch ON    



  • Air cleaner, double element with dust indicator
  • Alternator, 24 V/140 A
  • Batteries, large capacity, 2 x 12 V/200 Ah
  • Engine, Komatsu SAA6D170E-7
  • Starting motor, 24 V x 2/11.0 kW


  • Two x DC12V electrical outlets
  • Advanced joystick steering system
  • Auto air conditioner/heater
  • AM/FM radio with AUX input jack
  • Ashtray
  • Cigarette lighter
  • Color multi-monitor
  • Cup holder
  • Electronic pilot control fingertip control
  • Floor mat
  • Front wiper (with washer and intermittent)
  • Rear defroster (electric)
  • Rear window washer and wiper
  • ROPS/FOPS (ISO 3471/ISO 3449) cab
  • Seat, suspension type with reclining
  • Seat belt (two-point)
  • Space for lunch box
  • Starter receptacle
  • Sun visor


  • Access stair lamp, LH side
  • Back-up lights, LED
  • Directional signal
  • Hazard lamps
  • Head lamps, LH and RH side
  • Front work lamps, LH and RH side
  • Rear work lamps, LH and RH side
  • Stop and tail lamps, LED and turn signal lamps


  • Back-up alarm
  • Engine shutdown secondary switch
  • Hand rails for platform
  • Horn, electric
  • Parking brake, electric
  • Rear view mirrors
  • Rear view monitoring system
  • Service brakes, wet disc type


  • 35/65-33-36PR(L-4)
  • Large bore tire valves


  • Two-spool valve for boom and bucket controls
  • 3990 mm boom
  • Additional counterweight (850 kg)
  • Automatic digging system
  • Automatic shift transmission
  • Battery disconnect switch
  • Circuit breaker
  • Counterweight, standard
  • Ecology guidance, ecology gauge
  • Electronically controlled suspension system
  • Engine RPM set system
  • Engine shut-off system, electric
  • Front fenders
  • Fuel pre-filter with water separator
  • Hydraulic-driven fan with reverse rotation
  • Inline filters, steering and hydraulic
  • Integrated load meter
  • Komatsu auto idle shutdown
  • Komatsu SmartLoader Logic
  • KOMTRAX with KOMTRAX Plus function and wireless bridge
  • Lift cylinders and bucket cylinder
  • Lock-up clutch torque converter
  • Modulation clutch
  • Radiator, modulating core
  • Radiator mask, swing out
  • Rear access stair with handrail, RH side
  • Remote boom positioner, in-cab adjustable
  • Remote bucket positioner, in-cab adjustable, three positions
  • Transmission, four forward and four reverse
  • Vandalism protection kit
  • Work equipment shock reduction control


  • Three-spool valve with lever and piping
  • 3850 mm boom
  • Brake cooling system
  • Fast-fill fuel system
  • Load-and-carry specification
  • Power train guard
  • Secondary steering (ISO 5010)
  • Steering wheel, tiltable, telescopic
  • Various bucket options
  • Various tire options, radial and bias