Cummins/Onan — Lubricating Oil and Oil Filter Change/Replace
Maintenance · Lubricating oil system
From a Cummins/Onan owner's manual covering: K 19, K19, K19 Series, KTA19, KTTA19, Kt19. Check it applies to your exact model before use.
Applies to: Cummins/Onan K 19, Cummins/Onan Kt19, Cummins/Onan K19 Series (KT19/KTA19/KTTA19) engine, Cummins/Onan KT19 engine, Cummins/Onan KTA19 engine
Before you start
- Avoid direct contact of hot oil with skin.
- Fill oil filters with clean lubricating oil.
- Mechanical overtightening can distort threads or damage filter element seal.
Parts for this job
Part numbers from the service-parts lists for Cummins/Onan K 19, Cummins/Onan Kt19. 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 engine.
- Remove oil drain plug and drain oil immediately.
- Clean area around oil filter head and gasket surface.
- Remove full flow and bypass filters using oil filter wrench Part No. 3375049.
- Fill new filters with clean lubricating oil.
- Apply light film of oil to gasket sealing surface.
- Install filters as specified by filter manufacturer.
- Clean and install oil drain plug; Torque 100 Nm [75 ft-lb].
- Fill engine with clean oil to correct level.
- Operate engine at idle and inspect for leaks.
- Shut off engine, wait 5 minutes, check oil level.
Tools required
- 3375049 Oil Filter Wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 60°C [140°F]
- 100 Nm [75 ft-lb]
Full service-parts list: Cummins/Onan K 19 →, Cummins/Onan Kt19 →
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.