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Mid-size wheel loader

WA320-8

  • Horsepower 123 kW @ 2 000 rpm 165 HP @ 2,000 rpm
  • Operating weight 5 480 - 15 870 kg 34,128 - 34,987 lbs.
  • Bucket capacity 2.3 - 3.2 m³ 3.0 - 4.2 yd³

A versatile machine for your fleet

From agriculture, waste and residential job sites, look to a versatile machine, well-suited to work in multiple applications with easily changing attachments.

  • Easy operation with traction control modes
  • Long-lasting brake life with simple one-pedal operation
  • Impressive break-out force
  • Versatility for changing job site needs

Features and benefits

Enhanced control with HST

Help minimize wheel slippage and promote extended tire life with a smooth variable speed traction control system that helps keep your operator in control in virtually all working conditions. Auto-mode automatically adjusts without operator input, helping to keep loads stable.

Versatile PZ linkage plus high breakout force

Powerful breakout force and stability. Parallel-lift linkage with large break-out force and auto tilt-in feature simulates a Z-bar, which promotes material retention, helping operators save time and finish jobs faster.

Powerful performance, low fuel consumption

Save fuel while remaining productive. Komatsu's powerful engine and SmartLoader logic automatically creates enough torque for each work phase, reducing fuel consumption with no decrease in production.

Designed for easy maintenance

Swing out, hydraulically driven cooling fan that runs as needed, with new wider fin spacing and programable auto-reversing function makes cleaning easier. Gull-wing engine doors provide quick, convenient access for daily checks and service items.

Single-pedal operation

HST dynamic braking allows single-pedal operation which helps reduce periodic service, helps increases brake life, and promotes enhanced productivity, particularly among novice operators.

Optional high lift booms

Extend machine reach and application versatility with optional high lift booms, third spool hydraulics and quick coupler options, allowing owners to tackle bigger and more diverse projects.

Specifications for WA320-8

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US system Metric
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
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
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 Komatsu variable geometry turbo-charged, after-cooled, cooled EGR
Number of cylinders 6
Bore x stroke 107 x 124 mm
Piston displacement 6.69 L
Governor All-speed, electronic
Horsepower:
SAE J1995 - Gross 127 kW
ISO 9249 / SAE J1349 - Net 123 kW
Rated rpm 2 100 rpm
Max power - ISO 14396 @ 1 900 rpm 126 kW
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
Model Komatsu SAA6D107E-3*
Type Water-cooled, 4-cycle
Aspiration Komatsu variable geometry turbo-charged, after-cooled, cooled EGR
Number of cylinders 6
Bore x stroke 4.21 x 4.88 in
Piston displacement 408 in³
Governor All-speed, electronic
Horsepower:
SAE J1995 - Gross 170 HP
ISO 9249 / SAE J1349 - Net 165 HP
Rated rpm 2,100 rpm
Max power - ISO 14396 @ 1,900 rpm 169 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) 180 L/min
Relief valve setting 20.6 MPa
210 kgf/cm²
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders 2
Bore x stroke 70 x 453 mm
Loader control:
Hydraulic pump Piston pump, in common
with steering system
Capacity 180 L/min
Relief valve setting 30.4 MPa
310 kgf/cm2
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders bore x stroke
Lift cylinder - 2 120 x 729 mm
Bucket cylinder - 1 150 x 558 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 6.3 s
Dump 1.9 s
Lower (Empty) 3.5 s
Steering system:
Hydraulic pump Piston pump, in common
with loader control
Capacity (at rated rpm) 47.6 US gpm
Relief valve setting 3,000 psi
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders 2
Bore x stroke 2.76 x 17.8 in
Loader control:
Hydraulic pump Piston pump, in common
with steering system
Capacity 47.6 US gpm
Relief valve setting 4,410 psi
Hydraulic cylinders:
Type Double-acting, piston type
Number of cylinders bore x stroke
Lift cylinder - 2 4.7 x 28.7 in
Bucket cylinder - 1 5.9 x 22 in
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 6.3 s
Dump 1.9 s
Lower (Empty) 3.5 s
Service Refill Capacities
Cooling system 35.1 L
Fuel tank 245 L
Engine 23 L
Hydraulic system 92 L
Axle front 27 L
Axle rear 25.5 L
Transfer case 5.8 L
DEF tank 14 L
Cooling system 9.3 US gal
Fuel tank 64.7 US gal
Engine 6.1 US gal
Hydraulic system 24.3 US gal
Axle front 7.1 US gal
Axle rear 6.7 US gal
Transfer case 1.5 US gal
DEF tank 3.7 US gal
Steering System
Type Articulated type, fully-hydraulic power steering
Steering angle 38.5° each direction (40° to max end stop)
Minimum turning radius
at the center of outside tire
5 380 mm
Type Articulated type, fully-hydraulic power steering
Steering angle 38.5° each direction (40° to max end stop)
Minimum turning radius
at the center of outside tire
17 ft. 8 in
Transmission
Transmission Hydrostatic, 1 pump, 2 motors with speed range select
Travel Speed: Forward Reverse
1st 1.0 - 13.0 kph

1.0 - 13.0 kph

2nd 13.0 kph 13.0 kph
3rd 18.7 kph 18.7 kph
4th 38.0 kph 38.0 kph
Measured with 20.5-R25 tires
Transmission Hydrostatic, 1 pump, 2 motors with speed range select
Travel Speed: Forward Reverse
1st 0.6 - 8.1 mph

0.6 - 8.1 mph

2nd 8.1 mph 8.1 mph
3rd 11.6 mph 11.6 mph
4th 23.6 mph 23.6 mph
Measured with 20.5-R25 tires
  • 2-spool valve for boom and bucket control
  • Alternator, 24 V/ 90 A
  • Automatic hydraulic-driven fan with automatic reverse rotation
  • Back-up alarm
  • Batteries, 92 Ah/12V (2), 680 CCA
  • Battery disconnect
  • Boom kick-out, in-cab adjustable
  • Bucket positioner
  • Color, rear-view camera and monitor
  • Counterweight, standard and additional
  • Electronically Controlled Suspension System
  • Engine, Komatsu SAA6D107E-3 diesel
  • Engine shut-off system, electric
  • Equipment Management Monitoring System (EMMS)
    -- Lights (central warning, brake oil pressure, engine oil pressure, parking brake, cooling fan reverse, KDPF restriction, seat belt caution, Komtrax message)
    -- Gauges (DEF level, Engine water temperature, ecology, Fuel level, HST oil temperature, speedometer/tachometer), variable speed display
  • Front fenders
  • Fuel pre-filter with water separator
  • Horn, electric
  • Hydrostatic transmission
  • Komatsu SmartLoader Logic
  • Komatsu Auto Idle Shutdown
  • KOMTRAX® Level 5
  • Lift cylinders and bucket cylinder
  • Lights
    --Back-up light
    --Stop and tail light
    --Turn signal lamps, 2 front and 2 rear with hazard switch
    --Working lights, 2 front cab mount
    --Working lights, 2 front fender mount
    --Working lights, 2 rear grill mount
  • Loader linkage with standard lift arm
  • Multifunction mono-lever loader control transmission F/R switch
  • Parking brake, electric
  • Radiator, wider core
  • Radiator mask, swing up
  • Rear view mirrors, outside (2) inside (2)
  • Rims for 20.5-R25 tires
  • ROPS/FOPS Cab Level 2:
    --2 x DC12V electrical outlets
    --Ashtray
    --Auto air conditioner
    --Cigarette lighter, 24V
    --Color LCD/TFT multi-monitor
    --Cup holder
    --Floor mat
    --Operator seat, reclining, air suspension type, heated
    --AM/FM Bluetooth Radio with AUX input jack
    --Rear defroster, electric
    --Seatbelt, 2-point retractable, 76mm width
    --Space for lunch box
    --Steering wheel, tilt and telescopic
    --Sun visor, front window
    --Windshield washer and wiper, front with intermittent
    --Windshield washer and wiper, rear
  • Service brakes, wet disc type
  • Starting motor, 5.5 kW
  • Transmission speed ranges, 4 forward and 4 reverse
  • Vandalism protection kit, padlocks for battery box (2)
  • 2-spool valve for boom and bucket control
  • Alternator, 24 V/ 90 A
  • Automatic hydraulic-driven fan with automatic reverse rotation
  • Back-up alarm
  • Batteries, 92 Ah/12V (2), 680 CCA
  • Battery disconnect
  • Boom kick-out, in-cab adjustable
  • Bucket positioner
  • Color, rear-view camera and monitor
  • Counterweight, standard and additional
  • Electronically Controlled Suspension System
  • Engine, Komatsu SAA6D107E-3 diesel
  • Engine shut-off system, electric
  • Equipment Management Monitoring System (EMMS)
    -- Lights (central warning, brake oil pressure, engine oil pressure, parking brake, cooling fan reverse, KDPF restriction, seat belt caution, Komtrax message)
    -- Gauges (DEF level, Engine water temperature, ecology, Fuel level, HST oil temperature, speedometer/tachometer), variable speed display
  • Front fenders
  • Fuel pre-filter with water separator
  • Horn, electric
  • Hydrostatic transmission
  • Komatsu SmartLoader Logic
  • Komatsu Auto Idle Shutdown
  • KOMTRAX® Level 5
  • Lift cylinders and bucket cylinder
  • Lights
    --Back-up light
    --Stop and tail light
    --Turn signal lamps, 2 front and 2 rear with hazard switch
    --Working lights, 2 front cab mount
    --Working lights, 2 front fender mount
    --Working lights, 2 rear grill mount
  • Loader linkage with standard lift arm
  • Multifunction mono-lever loader control transmission F/R switch
  • Parking brake, electric
  • Radiator, wider core
  • Radiator mask, swing up
  • Rear view mirrors, outside (2) inside (2)
  • Rims for 20.5-R25 tires
  • ROPS/FOPS Cab Level 2:
    --2 x DC12V electrical outlets
    --Ashtray
    --Auto air conditioner
    --Cigarette lighter, 24V
    --Color LCD/TFT multi-monitor
    --Cup holder
    --Floor mat
    --Operator seat, reclining, air suspension type, heated
    --AM/FM Bluetooth Radio with AUX input jack
    --Rear defroster, electric
    --Seatbelt, 2-point retractable, 3" width
    --Space for lunch box
    --Steering wheel, tilt and telescopic
    --Sun visor, front window
    --Windshield washer and wiper, front with intermittent
    --Windshield washer and wiper, rear
  • Service brakes, wet disc type
  • Starting motor, 5.5 kW
  • Transmission speed ranges, 4 forward and 4 reverse
  • Vandalism protection kit, padlocks for battery box (2)
  • Auxiliary steering (SAE)
  • Cutting edge (bolt-on type)
  • Engine oil and coolant heater
  • Guarding package
  • Limited slip differential (F&R)
  • Lube system
  • Quick coupler
  • Rear full fenders
  • Three-spool valve (will utilize integrated proportional control switch included in the multi-function mono-lever) and piping
  • Various tire options, radial and bias
  • Various bucket options
  • Auxiliary steering (SAE)
  • Cutting edge (bolt-on type)
  • Engine oil and coolant heater
  • Guarding package
  • Limited slip differential (F&R)
  • Lube system
  • Quick coupler
  • Rear full fenders
  • Three-spool valve (will utilize integrated proportional control switch included in the multi-function mono-lever) and piping
  • Various tire options, radial and bias
  • Various bucket options
Support you can count on

Find what works for you