The reasons for the decline of the guide rail cargo lifts are as follows:
1. The emergency screw is not tightened;
2. Oil leakage in the oil circuit or leakage in the oil cylinder;
3. The normally closed valve is dirty or the check valve is dirty.
The corresponding elimination method for the decline of the guide rail hydraulic lift:
1. Remove normally closed valve or check valve for cleaning or replacement
2. Tighten the emergency screw
3. Overhaul oil circuit and oil cylinder
