Steering of the car was by turning the steering wheel, and use of the pedals for brake and clutch functions.

Steering clutch: multiple-disc oil powder metallurgy disc compressed by spring. hydraulic operated. brake is oil two direction floating band brake operated by mechanical foot pedal.

Based on the practical situations of current construction equipment maintenance, the fault of master clutch, hydraulic torque converter, driving bridge, steering clutch and brake are discussed.