Compressor Oil Change Procedure D185T4F

Perform oil changes on the Rotair compressor on your DB500 Mobile S or XL.


Tools Required:
  • Open end wrench for the (square head plug) drain plug
  • Drain pan
  • Funnel
  • Oil filter wrench
  • Clean shop rags

Supplies Required:

Follow the steps below:

  1. Run engine to bring compressor unit up to operating temperature
  2. Stop the engine and let unit sit for 5 minutes, allowing oil to enter the oil mist separator tank
  3. Make sure the PRESSURE GAUGE IS AT ZERO “0”PSI
  4. Remove the square head plug (ref #30) located at the bottom of the ball valve (ref #29) located at the bottom of the oil mist separator tank
  5. Place a drain pan under the unit and open the ball valve, allowing the oil to drain from the tank
  6. When the oil stops draining, close the ball valve and reinstall the square head plug with a new coper washer (ref#21) part# 015-005-S
  7. Remove the compressor oil filter
  8. Clean the filter sealing surface
  9. Apply clean oil to the oil filter seal and install the new filter, part #099-008-S (DO NOT OVER TIGHTEN THE FILTER – hand tight)
  10. Remove the dipstick
  11. Add 2.4 gallon of Compressor Oil AL-00025 to the tank through the dipstick tube
  12. Reinstall the dipstick
  13. Start the engine and check the compressor oil dipstick and square head plug for leaks
  14. Stop the engine, check for proper oil level, add oil as needed to reach the FULL mark on the dipstick
  15. Dispose of used oil and filter properly