Cummins/Onan — Returning the Unit to Service After Storage
Maintenance · generating plant
From a Cummins/Onan owner's manual covering: 10HQ, 10HQ-150R, 15HQ, 15HQ-150R, 15HQ-4R30. Check it applies to your exact model before use.
Applies to: Cummins/Onan 10HQ, Cummins/Onan 10HQ-150R, Cummins/Onan 15HQ, Cummins/Onan 15HQ-150R, Cummins/Onan 15HQ-4R30, Continental F162 engine
Before you start
- Always connect the ground cable lastly.
Procedure
- Remove protective grease coatings and wipe the unit clean.
- Inspect unit for damage and service as needed.
- Remove the plug from the exhaust outlet.
- Remove, clean and adjust spark plugs; crank engine by hand to distribute oil.
- Examine all fuel, oil and water lines and connections; service as needed.
- Refill cooling system; refill crankcase and air cleaner with correct oil.
- Check for leaks and correct before starting.
- Connect battery cables, grounding cable last; start in the regular manner.
Tools required
- wrenches Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan 10HQ →, Cummins/Onan 10HQ-150R →, Cummins/Onan 15HQ →, Cummins/Onan 15HQ-150R →, Cummins/Onan 15HQ-4R30 →, Continental F162 engine →
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.