• 254,700 lbs Operating Weight
  • 854 @2025 rpm Horsepower
  • 14.4 - 16 yd¬≥ Bucket Capacity


The WA800-8 is designed with quarry, aggregate, and mining customers in mind. When matched with 60 to 100 ton haul trucks, the WA800-8 delivers the performance and legendary reliability customers expect from Komatsu wheel loaders. The new cab keeps operators comfortable throughout long shifts. Walkways, handrails, catwalks, and ISO certified tie-off points are strategically located throughout the machine allowing for simplified access to all check points. Maintenance is made easy with the standard ground level service center. Optional KomVision all around monitoring system with Radar Obstacle Detection increases operator awareness.


New Productivity and Efficiency Features

  • Variable Traction Control System optimizes rim pull for various ground conditions, minimizing tire slippage and reducing maintenance costs
  • Modulation Clutch gives operators precise control of rim pull, allows for fast work equipment speeds and a smooth approach when loading trucks
  • A new Closed-Center, Load Sensing Hydraulic System (CLSS) keeps hydraulic oil cool, work equipment speed quick, and reduces fuel consumption
  • Throttle Lock improves cycle times by maintaining high work-equipment performance and saves fuel with auto-deceleration
  • Komatsu SmartLoader Logic helps reduce fuel consumption without compromising production
  • All new Komatsu bucket design, with modified profile to maximize bucket fill factor and increase productivity

New Operator's Environment

  • Large, ROPS/FOPS certified operator's cab with trainer seat provides a full view of the working area
  • 45 degree power staircase (optional) and 45 degree walkways on left and right side of machine for convenient access to the cab
  • Catwalks and guardrails on the counterweight and in front of the cab allow for easy maintenance
  • Work equipment shock reduction control (4 settings – off, low, middle, high)
  • Higher capacity air suspension seat (heated and ventilated)
  • LED external and internal lighting
  • Anchored tie off points (ISO 14567) located around the machine provide technicians locations to attach service lanyards
  • Electronically Controlled Suspension System (ECSS) provides a smooth ride for better travel performance, reducing operator fatigue and material spillage during operation

Reliability and Durability

  • Increased overhaul intervals on transmission and axles reduce the Total Cost of Ownership (TCO)
  • New loader linkage design with increased arm plate width for structural durability in the most challenging digging applications
  • Standard brake cooling and redesigned wet, multi-disk service brakes extend service intervals and require fewer service hours to complete planned maintenance
  • Standard engine pre-lubrication system ensures full lubrication upon startup to minimize unnecessary engine wear

New Machine Technology

  • Large 7" LCD color machine monitoring panel with integrated load meter
  • Advanced machine monitoring system with onboard diagnostics, no laptop required
  • KomVision with radar obstacle detection provides a bird’s eye view utilizing a 6-camera system and dedicated display (optional)
  • KOMTRAX Plus, for near-real time remote diagnostics of machine health and performance
  • Energy saving operation and ecology guidance provides operator with recommendations to improve operational efficiency and fuel economy
  • Automatic Dig, Semi-auto approach, and Semi-auto dump features automate work equipment control throughout a v-cycle to reduce operator fatigue while maintaining high levels of productivity



Komatsu SAA12V140E-7*
Water-cooled, 4 cycle
Turbo-charged, after-cooled, cooled EGR
Number of cylinders
Bore x stroke 140 mm x 165 mm 5.51'' x 6.50''
Piston displacement 30.48 ltr 1,860 in³
all-speed, electronic
    SAE J1995 - Gross 638 kW 856 HP
    ISO 9249/SAE J1349 - Net 637 kW 854 HP
    Rated rpm
2025 rpm
Fan drive method for radiator cooling
Fuel system
Direct injection
Lubrication system:    
Gear pump, force-lubrication
Full-flow type
Air cleaner
Dry type with double elements and dust evacuator, plus dust indicator

*EPA Tier 4 Final emissions certified


Torque converter: Three-elements, one-stage, one-phase

Transmission: Full-powershift, planetary type 

Travel speed
    1st Forward 7.6 km/h 4.7 mph
    1st Reverse* 7.9 km/h 4.9 mph
    2nd Forward 11.9 km/h 7.4 mph
    2nd Reverse* 12.1 km/h 7.5 mph
    3rd Forward 22.5 km/h 14.0 mph
    3rd Reverse* 22.7 km/h 14.1 mph


Measured with 45/65-R45 tires

Axles and Final Drives

Drive system
Four-wheel drive
Fixed, full-floating
Center-pin support, full-floating, 20° 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

Steering System

Articulated type, fully-hydraulic power steering
Steering angle
40° each direction
Minimum turning radius at
the center of outside tire
9880 mm 32' 5"

Hydraulic System

Steering system:

Hydraulic pump
Piston pump
Capacity / at rated rpm 2 x 220 ltr/min 2 x 58.1 U.S. gal/min
Relief valve setting 31.4 MPa 320 kgf/cm2 4,554 psi
Hydraulic cylinders:    
Double-acting, piston type
    Number of cylinders
    Bore x stroke 160 mm x 576 mm 6.3" x 22.7"
Work Equipment control:

Hydraulic pump
Piston pump
Capacity / at rated rpm 4 x 230 ltr/min 4 x 60.8 U.S gal/min
Relief valve setting 31.4 MPa / 320 kgf/cm² 4,554 psi
Hydraulic cylinders:    
Double-acting, piston type
    Number of cylinders—bore x stroke:
        Boom cylinder - 2 260 mm x 1495 mm 10.2" x 58.9"
        Bucket cylinder - 1 300 mm x 995 mm 11.8" x 39.2"
Control valve
Spool type
Control positions:    
Raise, hold, lower, and float
Tilt-back, hold, and dump
Hydraulic cycle time (rated load in bucket)    
10.2 s
3.1 s
    Lower (Empty)
4.9 s

Service Refill Capacities

Cooling system 370 ltr 97.7 U.S. gal
Fuel tank 1555 ltr 410.8 U.S. gal
Engine 120 ltr 31.7 U.S. gal
Hydraulic system 1020 ltr 269.5 U.S. gal
Axle (each front and rear) 370 ltr 97.7 U.S. gal
Torque converter and transmission 180 ltr 47.6 U.S. gal



  • Air Cleaner, Double Element with Dust Indicator and Evacuator
  • Engine, KOMATSU SAA12V140E-7, 12 Cylinder, Turbocharged, After Cooled, Diesel
    Gross HP: 856 HP (638kW) / 2025 RPM (SAE J1995)
    Net HP: 854 HP (637kW) / 2025 RPM (ISO 9249 / SAEJ1349)
  • Engine Pre-lubrication System
  • Exhaust Pipe Glasswooled with 2 x KDPF/KDOC
  • Fuel Pre-Filter with Water Separator
  • Hydraulic Cooling Fan, Reversible, Swing Out
  • Radiator, Modular Core, Swing Out Lattice Type Mask


  • Access Stair Lamps, (1 RH & 2 LH)
  • Alternator, 24V (140 Ampere)
  • Back-up Alarm
  • Back-up Lights, Rear, LED
  • Batteries, 4 x 12V, (160Ah)
  • Beacon, Amber Color
  • Circuit Breaker
  • Emergency Stop Switches, Ground Level (RH & LH)
  • Heavy Duty Wiring Harness
  • Horn, Electric
  • Instrument Monitor Panel, Multi Color Display
  • Secondary Shutdown Switch, Engine, Cab Mounted
  • Starting Motors, 11kW / 2 x 24V, Direct Electric
  • Stop and Tail Lights, LED
  • Turn Signals, (2 Front, 2 Rear) with Hazard Switch, LED
  • Work Lamps, LED, 22:
    6 Front Work Lamps (3 RH & 3 LH)
    6 Rear Work Lamps (3 RH & 3 LH)
    4 Side Work Lamps (2 RH & 2 LH)
    2 Axle Mounted Work Lamps (Front)
    4 Cab Mounted Work Lamps (2 Front & 2 Rear)


  • 3rd gear prohibition and speed limit control
  • Brake Cooling
  • Brake, Parking, Wet Multiple Disc, SAHR
  • Brakes, Service, Wet Multiple Disc, Sun Gear
  • Powertrain Underguard
  • Secondary Steering (ISO 5010)
  • Steering, Advanced Joystick Steering System (AJSS)
  • Transmission, 3-speed Planetary Automatic Powershift Modulation Clutch Kickdown, Automatic and Manual Control
  • Throttle Lock with Auto Deceleration
  • Variable Traction Control System


  • 45 Degree Stairways (LH & RH)
  • Access Ladder (LH & RH)
  • Cab, Steel, LH Entrance, ROPS/FOPS (ISO 3471/ISO 3449) 2 x DC12V Outlets, Auto Air Conditioner, Heater, Defroster (Front & Rear), Blinds, Front & Rear with Roll Curtains, Ecology Guidance, Ecology Gauge Lever, Machine Lockout
  • Main Monitor - Multi Color Electronic Display Onboard Diagnostics
  • Power Windows
  • Radio, AM/FM with Bluetooth
  • Rearview Mirrors, RH & LH, Heated
  • Rearview Camera Monitoring System (Dedicated Monitor)
  • Room/Spot Lamps, LED
  • Seat, Air Suspension, Reclining, Heated / Ventilated
  • Seat Belt, 3" Retractable, Lap Belt with Detachable Shoulder Harness
  • Secondary Door, RH
  • Sunvisor
  • Trainer Seat with Retractable Lap Belt
  • Wiper/Washer Front (Intermittent), Side, Rear (Intermittent)


  • Anchor Points, Tie Off Type
  • Battery Isolator, Lockable
  • Engine Bay Lamps, LED
  • Fast Fuel System
  • Ground Level Service Center: Grease Gauge, Indicator Lamp, Refill Port, Centralized KOWA Sampling Fluids Ports, Transmission, Hydraulic & Engine Oil, Torque Converter & Engine Coolant
  • Jump Start Receptacle
  • Machine Immobilization Switch, Lockable
  • Starter Isolator, Lockable)


  • 2-spool Valve for Boom and Bucket with Electronic Pilot Controls
  • Automatic Digging System
  • Boom Positioner with Kick-Out
  • Bucket Positioner with Kick-Out
  • Electronically Controlled Suspension System (ECSS)
  • Inline Filters, Steering and Hydraulic
  • Semi-Auto Approach and Dump System
  • Wall Digging Protection Control
  • Work Equipment Shock Reduction Control


  • Auto Idle Shutdown
  • Auto-Lubrication System
  • Front Fenders (LH & RH)
  • Komatsu SmartLoader Logic
  • KOMTRAX Plus
  • Load Meter System
  • Platform, Counterweight with Handrails
  • Platform, Front with Handrails
  • Rims for 45/65-45 Tires
  • Tow Hitch


  • Battery Box Lock
  • Cap Lock & Cover for Fuel Tank
  • Radiator, Filler Lock and Cover


  • 15.0 yd3 bucket
  • 45/65R45 (L-5) tubeless tires
  • 45 deg Power Staircase
  • Cold weather arrangement (electric heaters for hydraulic oil, transmission oil, engine oil, and coolant)
  • KomVision (with radar)