• 131,000 lbs Operating Weight
  • 527 @1800 rpm Horsepower
  • 8.25 yd¬≥ Bucket Capacity

WA600-6 Steel Mill

Komatsu-integrated design for exceptional value, reliability and versatility. Hydraulics, powertrain, frame, and all other major components are engineered by Komatsu. You get a machine whose components are designed to work together for higher production and reliability. Now add the Komatsu designed Steel Mill Arrangement with guarding and heat protection specifically matched to the WA600-6 resulting in a loader that handles hot slag and stays working longer for increased productivity.


External Hoses

All external hoses at risk of coming in contact with molten material are not only wrapped with FIRESLEEVE, but also protected by steel braided abrasion sleeves. The steel sleeve also covers all FIRESLEEVE wrapped hoses passing through the articulation area.

Steel Cable Steps

Rubber mounted steps near the battery box are replaced with steel cable steps.


FIRESLEEVE, a high temperature silicone rubber coated fiberglass sleeve, withstands 260°C 500°F continuous exposure; molten splash at 1205°C 2200°F for periods up to 15 minutes and short excursions to 1650°C 3000°F.


Axles and Final Drives

Drive system Four-wheel drive.
Front Fixed, full-floating.
Rear Center-pin support, full-floating, 26° total oscillation.
Reduction gear Spiral bevel gear.
Differential gear Conventional type
Final reduction gear Planetary gear, single reduction


Service brakes: Hydraulically actuated, wet disc brakes actuate on four wheels
Parking brake: Wet disc brake
Emergency brake Parking brake is commonly used


Model Komatsu SAA6D170E-5
Type Water-cooled, 4-cycle
Aspiration Turbocharged, aftercooled, cooled EGR
Number of cylinders 6
Bore x stroke 6.69" x 6.69" 170 mm x 170 mm
Piston displacement 1413 in³ 23.15 ltr
Governor all-speed, electronic
SAEJ1995 - Gross 530 HP 396 kW
ISO 9249 / SAEJ1349 - Net 527 HP 393 kW
Hydraulic fan at maximum speed 502 HP 374 kW
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 3 and EU stage 3A emissions certified.

Hydraulic System

Steering system:
Hydraulic pump Piston pump
Capacity at rated rpm 43.1 U.S. gal/min 163 ltr/min
Relief valve setting 4,980 psi 350 kgf/cm²
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders 2
Bore x stroke 4.5" x 20" 115 mm x 510 mm
Loader control:
Hydraulic pump Piston pump
Capacity at rated rpm 63.1 + 63.1 U.S. gal/min 239 + 239 ltr/min
Relief valve setting 4,980 psi 350 kgf/cm²
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders: Bore x Stroke Bore x Stroke
Boom cylinder / 2 7.9" x 42" 200 mm x 1067 mm
Bucket cylinder / 1 8.9" x 30.6" 225 mm x 776 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 9.3 sec
Dump 2.3 sec
Lower (Empty) 4.1 sec

Service Refill Capacities

Cooling system 38.8 U.S. gal 147 ltr
Fuel tank 189.7 U.S. gal 718 ltr
Engine 22.7 U.S. gal 86 ltr
Hydraulic system 117.0 U.S. gal 443 ltr
Axle (each front and rear) 41.0 U.S. gal 155 ltr
Torque converter and transmission 21.9 U.S. gal 83 ltr

Steering System

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


Torque converter Type 3-element, single-stage, double-phase
Transmission Type Full-powershift, planetary type
Travel speed measured with 35/65-33 tires: Forward Reverse
1st 4.2 mph
6.7 km/h
4.5 mph
7.3 km/h
2nd 7.3 mph
11.7 km/h
8.0 mph
12.8 km/h
3rd 12.6 mph
20.3 km/h
13.7 mph
22.0 km/h
4th 21.0 mph
33.8 km/h
23.0 mph
37.0 km/h


  • 2-spool valve for boom and bucket controls
  • 3990 mm / 13'1" boom
  • Advanced Joystick Steering System (AJSS)
  • Alternator, 90 A/24 V
  • AM/FM stereo radio cassette
  • Auto air conditioner
  • Auto shift transmission with mode select system
  • Back-up alarm
  • Back-up lamp
  • Battery disconnect switch
  • Batteries, 200 Ah/12 V x 2
  • Boom kick-out
  • Bucket positioner
  • Counterweight, large 3780 kg / 8,333 lb
  • Directional signal
  • Electronically Controlled Suspension System (ECSS)
  • Engine RPM set
  • Engine, Komatsu SAA6D170E-5 diesel
  • EPC fingertip control levers with automatic leveler and positioner
  • Floormat
  • Front fender
  • Hard water arrangement (corrosion resister)
  • Hydraulic-driven fan with reverse rotation
  • In-line filter, steering
  • In-line filter, high pressure hydraulic
  • KOMTRAX Plus
  • Lift cylinders and bucket cylinder
  • Lock-up clutch torque converter
  • Main monitor panel with Equipment Management Monitoring System (EMMS)
  • Radiator mask, lattice type
  • Rear access stairs
  • Rear defroster (electric)
  • Rear under view mirror
  • Rearview mirrors
  • Rear window washer and wiper
  • Rims for 35/65-R33 L4 tires
  • ROPS/FOPS Level 2 cab
  • Seat belt, 76 mm / 3" wide
  • Seat, suspension type with reclining
  • Semi-auto digging system
  • Service brakes, wet disc type
  • Starting motor, 11.0 kW/24 V x 2
  • Sun visor
  • Transmission, 4 forward and 4 reverse


  • Additional 2 front and 2 rear light package
  • Axle/brake cooling system
  • Beacon wiring harness
  • Bellcrank grease metal tube
  • Emergency engine shut down at ground level
  • Fire suppressant system ready
  • FIRESLEEVE exposed hoses
  • FIRESLEEVE all exposed wire harnesses
  • FIRESLEEVE covered high amperage wire harness
  • Guarding package for hydraulic tank, brake component box, drive train, front frame, fual tank, and fenders
  • Hydraulic oil quick sample port
  • Hydraulic tank drain quick coupler
  • Insulated and sealed battery box
  • Metal backed mirrors
  • Platform guard chains
  • Raised axle breathers
  • Remote parking brake override at ground level
  • Right rear fender
  • Steel cable rear steps
  • Steel sleeve hose guards
  • Transmission override in cab



  • 35/65-33 tires
  • Ansul Fire Suppressant System
  • EcoSafe FR46 hydraulic fluid
  • EcoSafe FR68 hydraulic fluid
  • Lincoln Auto Lubrication System
  • Optimax dual stage pre-cleaner
  • Sacrificial glass
  • Slag bucket