Reasons and treatment method
Trouble | Trouble reason | General treatment method |
Hydraulic engine fails to work. | 1. Power failure 2. Normally closed contact of stroke switch is cut off. 3. Poor connection with other electrical appliances. | Electrician shall inspect them one by one to solve problems. |
Difficult rotation of oil pump | 1. Excessive load 2. Different shafts of engine of oil pump 3. Jammed oil pump 4. Jammed valve 5. Severely polluted hydraulic oil | 1. Adjust it to the rated limit load. 2. Adjust concentricity. 3. Replace the oil pump shaft of engine can not rotate manually. 4. Detach and clean or replace the valve after confirmation. 5. Replace hydraulic oil. |
Engine and oil pump operate normally but working platform does not rise or bearing weight is less than rated weight. | 1. Too low pressure of hydraulic system 2. Air enters into the hydraulic system due to leakage of oil suction pipelines of oil pump 3. Too low oil level in the oil tank | 1. Adjust overflow valve of hydraulic valve block. 2. Tighten every connector or replace the gasket ring. 3. Add hydraulic oil to the normal oil level. |
Working platform can not decline suddenly. | Jammed electromagnetic valve | Detach and clean the electromagnetic valve or replace the valve block. |
