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Home›Repair guides›Cummins/Onan›Cleaning/Replacing the Air Filter

Cummins/Onan Onan P4500i / P4500 — Cleaning/Replacing the Air Filter

Maintenance

For the Cummins/Onan Onan P4500i / P4500, from the Cummins/Onan operator's manual.

Applies to: Cummins/Onan Onan P4500i, Cummins/Onan P4500

Before you start

  • DO NOT twist or tear the air filter during cleaning or drying

Parts for this job

  • A058U960 Air filter — Cummins/Onan P4500 Amazon eBay

Part numbers from the service-parts lists for Cummins/Onan Onan P4500i, Cummins/Onan P4500. Verify against your serial number before ordering; some links are affiliate links.

Procedure

  1. Turn the generator off and allow the engine to cool for 30 minutes.
  2. Remove the cover screws then pull the engine service cover away from the generator.
  3. Turn the knobs on the air filter cover to the unlocked position. Tip the cover down to remove.
  4. Remove the air filter from the air cleaner housing.
  5. Wash the air filter in household detergent soap and warm water; slowly squeeze to clean.
  6. Rinse in fresh water and allow the filter to dry thoroughly.
  7. Dip the air filter in clean engine oil then squeeze out all excess oil.
  8. Install the air filter and air filter cover, then install the engine service cover.

Full service-parts list: Cummins/Onan Onan P4500i →, Cummins/Onan P4500 →

Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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