Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›Cummins/Onan›Coolant Filter Replacement

Cummins/Onan GTA38 / GTA50 — Coolant Filter Replacement

Maintenance · Cooling system

For the Cummins/Onan GTA38 / GTA50, from the Cummins/Onan owner's manual.

Applies to: Cummins/Onan GTA38 engine, Cummins/Onan GTA50 engine

Before you start

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

Procedure

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

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.

More Cummins/Onan repair guides →