Fault Phenomenon: XCMG truck crane operating the PTO switch in the cab, no PTO engagement sound is heard, hydraulic pump does not turn.

Troubleshooting Process:
– Checked air system pressure: pressure normal.
– Checked PTO solenoid valve: spool not actuating.
– Checked clutch pedal switch: switch damaged, signal not sent.
– Replaced clutch pedal switch.

Root Cause: The clutch pedal switch failed, and the ECU did not receive the signal allowing PTO engagement.

Required Parts: Clutch pedal switch.