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Home›Repair guides›Cummins/Onan›Coolant Filter Replacement

Cummins/Onan GTA14 / GTA14 qi 20 NA — Coolant Filter Replacement

Maintenance

For the Cummins/Onan GTA14 / GTA14 qi 20 NA, from the Cummins/Onan owner's manual.

Applies to: Cummins/Onan GTA14 qi 20 NA, Cummins/Onan GTA14 engine

Before you start

  • Do not remove radiator cap from a hot engine
  • Severe engine damage will result if the valve is left in the closed position

Procedure

  1. Turn coolant filter head shut-off valve to Off position.
  2. Remove and discard coolant filter; clean gasket surface on filter head.
  3. Apply light film of Lubriplate 105 to coolant filter gasket sealing surface.
  4. Install filter as specified by manufacturer.
  5. Open shut-off valve and install coolant system pressure cap.
  6. Operate engine until coolant temperature is above 82 C [180 F] and check for leaks.
  7. Check coolant level after air is purged.

Full service-parts list: Cummins/Onan GTA14 qi 20 NA →

Source: Cummins/Onan owner'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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