Cummins/Onan — Change Engine Oil ('B' Check)
Maintenance · engine lubricating system
From a Cummins/Onan operator's manual covering: G-1710, G-495, G-743, G-855, GTA-1710, GTA-743, GTA-855. Check it applies to your exact model before use.
Applies to: Cummins/Onan G-855
Before you start
- Visually check for oil leaks after every oil and/or filter change.
Procedure
- Bring engine to operating temperature; shut off; remove drain plug from bottom of oil pan; drain oil.
- Install drain plug and torque to 60-70 ft-lb.
- Fill crankcase to 'H' (high-level) mark on dipstick.
- Start engine and visually check for oil leaks.
- Shut down engine; allow 15 minutes for oil to drain back; recheck level.
- Add oil as required to bring level to 'H' mark.
Specs & values
- drain plug torque 60-70 ft-lb
Source: Cummins/Onan operator'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.