Closed-center Load Sensing System (CLSS) Hydraulic System

With CLSS hydraulics, blade lever stroke is directly proportional to blade speed, regardless of the load and travel speed. This results in superb fine controllability.

Palm Command Control System (PCCS)

      

The low-effort PCCS joystick controls all directional movements including machine travel speed as well as counter-rotation.

Comfortable Ride with Cab Damper Mounting

 

The D51’s cab mount uses a cab damper system that provides excellent shock and vibration absorption which conventional mounting systems are unable to match.

The silicon oil filled cab damper mount helps to isolate the cab from the machine body, suppressing vibration and providing a quiet, comfortable operating environment.

HST with Electronic Control

 

The D51 is equipped with a Komatsu-designed Hydrostatic Transmission (HST) that allows Quick-Shift or variable speed selection. The HST consists of dual-path closedcircuits with two variable displacement piston pumps and two variable displacement travel motors. Hydrostatic steering eliminates steering clutches and brakes, providing smooth powerful turns. Fully electronic control provides full automatic shifting and enables smooth control. Engine speed is controlled using an electronic fuel control dial.

Palm Command Proportional Pressure Control

PPC-controlled palm command joystick provides blade control. Combined with the highly reliable Komatsu hydraulic system, precise control is the result.