Fault handling
| 1. The tail lift cannot descend Cause investigation: 1. Insufficient battery power causes the solenoid valve to fail to open 2. There is a short circuit in the circuit, and the descending electromagnet is electrified 3. The one-way valve is damaged Solution reference: 1. Fully charge the battery 2. Check the circuit and repair it 3. Replace the one-way valve | 2. The tail lift automatically flips downwards Cause investigation: 1. The oil seal of the flipping cylinder is damaged 2. The oil seal of the directional valve is damaged 3. The oil seal of the balance cylinder is damaged Solution reference: 1. Replace with a new one 2. Regular inspections 
 | 3. The motor starter makes noise and the motor does not work 
 Cause investigation: 1. The contact of the motor starter is burnt out 2. The entire motor is broken 
 1. Replace the motor starter with a new one 2. Replace the motor with a new one | 
| 4. After replacing the oil seal, the tail lift cannot be raised 
 Cause investigation: 1. Gear pump damaged 2. The transmission shaft at the connection between the motor and the gear pump is damaged 
 1. Replace the gear pump with a new one 2. Check and repair the transmission shaft | 5. Automatic landing or tilting of the tail lift 
 Cause investigation: 1. The lifting valve is stuck or damaged 2. The lowering valve is stuck or damaged 3. Oil pipe or cylinder leakage Solution reference: 1. Clean or replace the lifting valve 2. Clean or replace the lowering valve 3. Replace the sealing ring, or replace the oil pipe or cylinder 
 | 6. Oil leakage and seepage occur 
 Cause investigation: 1. Loose joints; 2. Damaged sealing gasket 3. Pipeline rupture Solution reference: 1. Tighten the joint 2. Replace the sealing gasket 3. Replace the pipeline with a new one | 
 
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