Fault Phenomenon: JAC diesel forklift when depressing the clutch pedal, shifting gears is difficult, accompanied by gear grinding noise.

Troubleshooting Process:
– Checked clutch pedal free play: play too small.
– Checked release bearing: bearing worn.
– Checked clutch disc: warped and deformed.
– Checked hydraulic master cylinder: master cylinder push rod stroke insufficient.

Root Cause: Clutch pedal free play is too small or the clutch disc is warped.

Required Parts: Clutch disc assembly or linkage adjustment.