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What is the reason for the non-rotation of Komatsu 56?

1 Answers

DelAnnie

08/28/25 8:01am

Komatsu 56's non-rotation may be due to a pilot pump failure. Fault inspection method: Use a pressure gauge to test at the pilot pump's pressure measurement port. If the pressure is between 35-45 kg, it is considered normal. Introduction to the pilot pump: A broken output shaft in the pilot pump can directly cause the excavator to have no movement at all, which shows how important the role of the pilot pump is. The excavator pilot pump pushes the main control valve block valve stem (distribution valve) through the pilot PPC valve (handle, foot pedal valve), directing the high-pressure oil output from the main pump to the designated working devices, such as the boom, arm, bucket, swing motor, and travel motor.

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