You are here » Home » Comet Pump Oil Change

Comet 5030 Pressure Washer Pump: How to change the oil

How to Change the Pump Oil on a Comet 5030 Pressure Washer Pump.

Photo of Comet 5030 Pressure washer pump
Comet 5030 Pressure Washer Pump


Tools and materials needed:

  • New oil (Comet recommends using their own brand of oil, but any high-quality detergent oil will do)
  • Funnel
  • Oil drain pan
  • Wrench
  • Rags


Before starting the oil change take the Pressure washer unit to a suitable place and wash the pump. Pay attention to the oil filler cap area and the oil drain plug. Once the pump has dried continue on.

  1. Make sure the pressure washer is turned off and water feed hose disconnected.
  2. Disconnect the high-pressure hose from the pump.
  3. Locate the oil drain plug on the bottom of the pump and clean around it if it’s dirty.
Comet 5030 Pressure Washer pump oil drain bolt
Removing the Comet 5030 Drain plug


4. Place the oil drain pan underneath the drain plug.

5. Use the wrench to remove the oil drain plug.

6. Allow the old oil to drain into the pan. Make sure the pump is on level ground and let if drain for about 5 minutes or until the dripping has stopped.

6. Once the old oil has drained, clean the drain plug with a lint free rag, also clean the drain plug hole. Now replace the drain plug and tighten it with the wrench.

Photo of clean Comet 5030 Pressure Washer pump oil fill hole hot and oil fill plug
Comet 5030 Pressure Washer pump Oil drain plug and yellow oil fill cap.

7. Locate the oil fill cap on the top of the pump.

8. Remove the oil fill cap.

9. Use a funnel to add new oil to the pump. The pump fills up quickly and takes a few seconds to level out. Best to fill the pump in small Intervals to avoid over filling. The pump is full when the oil reaches the red dot on the sight glass. If you do overfill the pump use a large syringe to suck some of the oil out.

Photo displaying the oil fill level sight glass on a comet 5030 Pressure Washer pump
Oil level sight glass


10. Replace the oil fill cap.

11. Reconnect the high-pressure hose to the pump.

12. Start the pressure washer and let it run for a few minutes to circulate the new oil.

13. Check the oil level again and add more oil if necessary.

14. Turn off the pressure washer and you’re done!


  • It is important to use the correct type and amount of oil when changing the oil in your Comet pressure washer pump. The manufacturer’s instructions will specify the type and amount of oil that should be used.
  • Be sure to dispose of the old oil properly. Do not pour it down the drain or onto the ground.
  • Change the oil in your Comet pressure washer pump every 50 hours of use, or at least once a year.
  • If you use your pressure washer frequently, you may need to change the oil more often.
  • By following these instructions, you can help to ensure that your pressure washer pump lasts for many years to come.
Photo displaying BE Pump oil for changing the oil in a Comet 5030 pressure washer pump
BE Pump oil for changing the oil in a Comet 5030 Pressure Washer Pump

visit for more great Info on Pressure Washing and Soft Washing.


Residential, commercial pressure cleaning bannerProfessional Pressure Washing Service



Arrange a Quote


Contact us today for a powerful external clean.