Regular Air Compressor Maintenance Checklist: Replacement Cycles of Lubricating Oil, Filter Elements and Oil Separator

1. Reference Basis

The cycle follows the requirements of JB/T 6430 standard and original manufacturer maintenance manual. The cycle below is the standard cycle under clean and normal ambient conditions. Shorten the cycle for dusty, high temperature, high humidity or chemical corrosive environment.

2. Lubricating Oil (Compressor Oil)

• Standard oil-injected screw compressor special lubricant: First replacement after 500 hours running-in period; subsequent replacement every 2000 hours or 12 months, whichever comes first.
• Fully synthetic high-grade compressor oil: Replace every 4000 hours or 24 months, whichever comes first.
• Inspection items: Regularly check oil level, oil color and viscosity. If the oil turns black, emulsifies or has peculiar smell, replace it in advance. Mixed use of different brands and grades of lubricant is forbidden.

3. Air Filter Element

Standard cycle: Replace every 2000 hours. Check the pressure difference monthly. If the pressure difference exceeds the alarm value, clean or replace immediately. In heavy dust workshops, inspection shall be carried out every week and the replacement cycle shall be shortened. Blocked air filter will reduce air output and cause oil contamination inside the unit.

4. Oil Filter

Standard cycle: Replace together with lubricating oil, 2000 hours for mineral oil, 4000 hours for synthetic oil. The oil filter intercepts metal debris and impurities in the oil circuit. Failure to replace it on time will accelerate the wear of the main rotor bearing.

5. Oil Separator Core (Oil Separator)

Standard cycle: Replace every 3000 ~ 4000 hours. Judge the working state by oil separation pressure difference. When the pressure difference exceeds the specified value, the separation efficiency declines, oil carry-over increases, and oil consumption rises abnormally. Severe failure will bring oil into the rear air pipeline and pollute the equipment.

6. Other Periodic Inspection Items

Check minimum pressure valve, check valve, temperature control valve, cooling system, motor bearing and electrical contact regularly. Establish machine maintenance log to record running hours and replacement records of consumables. Scientific periodic maintenance can extend the service life of the air end greatly and reduce unexpected shutdown loss.