Cummins/Onan M1894s / M1895s — Engine Oil and Filter Change
Maintenance · engine lubrication system
For the Cummins/Onan M1894s / M1895s, from the Cummins/Onan owner's manual.
Applies to: Cummins/Onan M1894s, Cummins/Onan M1895s, Cummins/Onan MCGBA, Cummins/Onan MCGCA, Cummins/Onan MCGDA, Cummins/Onan MCGDB, Cummins/Onan MCGGA
Before you start
- Used engine oils have been identified by some state or federal agencies as causing cancer or reproductive toxicity; avoid ingesting, breathing fumes or contact.
Procedure
- Run the engine until it is up to operating temperature and shut it off.
- Open the oil drain valve and drain the oil into a suitable container.
- Remove the oil filter with a filter wrench.
- Fill the new filter with oil and apply a film of oil to the gasket.
- Screw the filter on by hand until the gasket just touches the filter head, then tighten another 3/4 turn.
- Close the oil drain valve and fill with oil to the high mark (H) on the dipstick.
- Start the engine and check for leaks.
- Shut off the engine, wait 10 minutes and refill to the high mark (H) if necessary.
Tools required
- filter wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tighten the oil filter another 3/4 turn after the gasket touches the filter head.
- Fill to the high mark (H) on the dipstick.
Full service-parts list: Cummins/Onan M1894s →, Cummins/Onan M1895s →, Cummins/Onan MCGBA →, Cummins/Onan MCGCA →, Cummins/Onan MCGDA →, Cummins/Onan MCGDB →, Cummins/Onan MCGGA →
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.