Cummins/Onan GTA14 / GTA14 qi 20 NA — Lubricating Oil and Filter - Changing
Maintenance · Lubrication system
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
- Hot oil can cause personal injury
- Oil pressure must be indicated within 15 seconds after starting or shut off engine
Parts for this job
- LF750 Oil filter Amazon eBay FridayParts $44.73
Part numbers from the service-parts list for Cummins/Onan GTA14 qi 20 NA. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Operate engine until water temperature reaches 60 C [140 F]; shut off and remove oil drain plug (17-mm).
- Clean filter head area, remove filter with 118 to 131 mm filter wrench, clean gasket surface.
- Install correct oil filter (LF3000).
- Fill oil filter with clean oil; apply light film of oil to gasket.
- Install filter; check and clean oil drain plug threads and sealing surface.
- Install oil drain plug.
- Fill engine: pan 36.00 L, filter 2.70 L, total system 41.64 L.
- Operate engine at idle and inspect for leaks.
- Stop engine, wait 5 minutes, check and top up oil level to H mark.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Oil drain plug torque 88 Nm [65 ft-lb]
- Pan capacity 36.00 L [38.0 U.S. Quarts]
- Filter capacity 2.70 L [2.8 U.S. Quarts]
- Total system capacity 41.64 L [44.0 U.S. Quarts]
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.