Cummins/Onan GTA8.3 / GTAB.3 — Lubricating Oil and Filter - Changing
Maintenance · Lubrication system
For the Cummins/Onan GTA8.3 / GTAB.3, from the Cummins/Onan owner's manual.
Applies to: Cummins/Onan GTA8.3 engine
Before you start
- Hot oil can cause personal injury.
- Mechanical overtightening can distort threads or damage filter element seal.
Procedure
- Operate engine until water temperature reaches 60 °C [140 °F] and shut off.
- Remove oil drain plug and drain oil.
- Remove filter using filter wrench, clean gasket surface.
- Install correct oil filter LF3000.
- Fill oil filter with clean lubricating oil.
- Apply light film of oil to gasket before installing new filter.
- Install oil drain plug and torque to 80 Nm [60 ft-lb].
- Fill engine to proper level.
- Operate engine at idle and inspect for leaks.
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 80 Nm [60 ft-lb]
- Pan capacity 18.9 litres [5 U.S.Gal]
- Total system capacity 34 litres [9 U.S.Gal]
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.