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Internal Combustion Trucks AX50/BX50 1.0ton - 3.5ton

Function of Internal Combustion Trucks AX50/BX50 Series

Satisfying high workability and environmental performance required by the jobsite



Excellent lifting performance to speed up work

Super Lift Hydraulic System*

The tandem pump operates the power steering and the lifting equipment independently. Komatsu’s hydraulic technology lifts the cargo at about double the lift speed of the previous model when idling. The truck also features fine adjustments for the fork position and superior operability of attachments when idling.

*The Super Lift Hydraulic Systems available on the BX50 Series.

Super Lift Hydraulic System

Low idle lifting speed

Excellent starting performance even at a jobsite where stationary steering is often required

Starting while performing stationary steering

Super Lift Hydraulic System* allows operator to perform stationary steering and start the truck smoothly without revving up the engine. Even in that case, the engine does not stall. This system is highly appreciated at jobsites where stationary steering is often required.

*The Super Lift Hydraulic Systems available on the BX50 Series.

Komatsu Reliability

Komatsu’s unique designs have further extended the life span of the truck. Both the new frame structure and changes to the mast improve durability. Improvement of the heat balance also enhances reliability during heavy operations. The meantime between failures (MTBF) has been extended by 40% plus.
Maintenance and repair costs are minimized by extensive testing and quality inspections under different operating environments.

Durability improved 40% Up (Compared with previous model)

Exceptional Heat Balance

The bell-shaped shroud concentrates cooling air into the radiator. The unique shape of the counterweight opening and fan improves cooling performance by increasing the airflow of cooling air. Plus, the Super Lift Hydraulic System (BX50 Series) is designed to reduce oil pressure loss, which also prevents the oil temperature from overheating.



Travel control as intended

Small diameter steering wheel and fully hydrostatic power steering mechanism.

The small diameter steering wheel provides 100% stationary steering and switch backs. The superior responsiveness of the steering wheel optimizes maneuverability even in narrow spaces.
Fluctuations during traveling have also been reduced by more than 30% to improve travel performance.

The small diameter steering wheel provides 100% stationary steering and switch backs

Consideration for Comfortable Operation

Komatsu’s Research and Development team considers operators.
Every aspect concerning an operator’s comfort and ease of use have been thoroughly studied and implemented in each design.
For instance, the control indicators and levers have been ergonomically designed and arranged in accessible and visible locations.
Komatsu prides itself on developing products, which are designed to optimize both comfort and productivity.

Combination switch

Combination switch
(turn signal light and light switch)

Electric forward/reverse lever

Electric forward/reverse lever
(TORQFLOW model)

Control levers designed for fingertip control.

Control levers designed for fingertip control.

Double-cone synchronized clutch

Double-cone synchronized clutch (clutch model)


Pursuing environmental performance

EPA Tier3 and
EU Stage IIIA compliant diesel engines

Diesel engines that incorporate Komatsu's advanced engine technologies feature excellent environmental performance and conform to the world latest EPA Tier3 and EU Stage IIIA emission regulations.
The diesel engines mounted on the BX50 Series reduce particulate matter (PM) in the exhaust gases by 30% to reduce environmental load.

Powerful engine with low fuel consumption

Thanks to the EPA Tier3 and EU Stage IIIA compliant engine and the Super Lift Hydraulic System*1, fuel consumption is reduced and powerful performance is realized. Fuel consumption is further improved by 8%*2 and CO2 emissions are also reduced.

*1 The Super Lift Hydraulic Systems available on the BX50 Series.
*2 Measurements of test conducted on Komatsu test course, comparison with FD25T-16.