Fault Phenomenon: Quicktron AGV forklift when lifting a rack, the lift mechanism seizes, cannot raise or lower.

Troubleshooting Process:
– Checked screw: screw deformed.
– Checked nut: nut worn.
– Checked motor: motor overheating.
– Checked for foreign objects: debris caught.

Root Cause: The lift screw nut is worn or foreign objects are caught, causing seizure.

Required Parts: Lift screw nut assembly.