1、 Pre operation inspection

1. Oil level and fluid inspection
   • Check the oil level in the fuel tank before starting up every day to ensure that the oil level is not lower than the lower limit of the oil gauge, in order to avoid cavitation caused by insufficient oil absorption.
   • Select hydraulic oil that meets the equipment requirements, regularly check the cleanliness of the oil, and prevent impurities from entering the system.
2. Initial state confirmation
   • Check if all major components (such as electromagnets and valves) are in their original state to ensure that the system is functioning properly.
   • Confirm that the drive device is aligned with the pump axis to avoid vibration or misalignment.
3. preheating operation
   • When restarting after a shutdown of more than 4 hours, let the pump idle for more than 5 minutes before working under pressure to prevent dry friction from damaging components.

2、 Monitoring during operation

1. parameter record
   • Regularly record parameters such as work pressure, speed, and voltage, observe meter readings, and establish operational records.
   • Monitor the oil temperature and maintain the working temperature between 35 ℃ and 55 ℃. If the temperature is abnormal, immediately stop the machine for troubleshooting.
2. Abnormal response
   • Pay attention to the sound and vibration of the system during operation. If any abnormalities are found (such as metal friction sound), stop the pump immediately and check for loose parts or installations inside the pump.
   • Observe whether the pipe joints and flanges are loose to prevent accidents caused by leaks.

3、 Daily cleaning and sealing maintenance

1. Equipment cleaning
   • Clean the surface dust and oil stains of the pump body daily to prevent corrosive substances from corroding.
   • Keep the maintenance environment clean and prevent pollutants from entering the fuel tank or system.
2. Sealing inspection
   • Regularly check whether the seals (such as O-rings and shaft seals) are aging or damaged, and replace them promptly if leaks are found.
   • For spherical flow friction pairs, shallow scratches can be repaired by grinding, while deep grooves need to be filled before grinding.

4、 Key component maintenance

1. Bearing inspection
   • The average lifespan of bearings is about 10000 hours, and they need to be replaced after exceeding the deadline.
   • When disassembling bearings, visually inspect the surface of the rollers. If there are scratches or discoloration, they must be replaced.
2. Oil replenishment pump inspection
   • After 3000 hours of use, check the running sound of the oil replenishment pump daily. If the hydraulic cylinder speed decreases or becomes blocked, immediately disassemble and inspect the impeller edge and internal gear pump clearance.
3. Variable mechanism maintenance
   • Check the inclination angle of the variable piston and the inclined plate to ensure that the displacement is normal.
   • Adjust the pressure of the overflow valve to prevent system failure caused by low pressure.

5、 Hydraulic system maintenance

1. filter replacement
   • Regularly replace the suction filter and return filter elements to prevent impurities from entering the pump.
   • Pay attention to cleaning when replacing to avoid secondary pollution.
2. Oil management
   • Replace hydraulic oil according to the prescribed cycle, drain the old oil during oil change, and clean the oil tank and pipelines.
   • Avoid mixing particulate matter into the oil to prevent damage to the friction pair.

6、 Long term suspension management

1. Pre processing before discontinuation
   • During long-term shutdown, drain the oil from the pump and perform cleaning and rust prevention treatment.
   • Apply rust proof oil on the surface of the pump and wrap it with plastic film or oil paper.
2. Re enable check
   • Before putting it back into use, thoroughly inspect the pump body, seals, and pipeline connections.
   • First, conduct an idle test to confirm that there are no leaks or abnormalities before running with load.