Cummins/Onan — Change Engine Oil
Maintenance · Lubricating system
From a Cummins/Onan owner's manual covering: KT38, KTA19, Kt19, KtA38, KtA50, N-855, NH-672, NH-743, NH-855, NT-855, NTA-855, NTC-270…. Check it applies to your exact model before use.
Applies to: Cummins/Onan Kt19, Cummins/Onan KTA38, Cummins/Onan KTA50
Before you start
- Never operate the engine with the oil level below the 'L' (low) mark or above the 'H' (high) mark.
Procedure
- Bring engine to operating temperature, shut down the engine, remove the drain plug from the bottom oil pan and drain the oil.
- Install the drain plug and torque per engine model.
- Fill the crankcase to the 'H' (high level) mark on the dipstick.
- Start the engine and visually check for oil leaks.
- Shut down the engine; allow 15 minutes for oil to drain back into the pan; recheck the oil level and add oil as required.
Specs & values
- 855, V-903 Amazon eBay $218.96 FridayParts $11.24 SinoCMP $429.00, KT/KTA19 Amazon eBay FridayParts $14.99 SinoCMP $65.00, KT/KTA38 Amazon eBay $99.99 FridayParts $8.00 SinoCMP $179.00, KTA50 Amazon eBay $59.82 FridayParts $14.33 SinoCMP $599.00 drain plug torque 60 to 70 ft-lbs [81 to 85 N·m]
- V-378 FridayParts $47.99, V-504 FridayParts $28.95, V-555 FridayParts $30.99 drain plug torque 35 to 40 ft-lbs [47 to 54 N·m]
- V-1710 drain plug torque 45 to 44 ft-lbs [61 to 75 N·m]
Full service-parts list: Cummins/Onan Kt19 →, Cummins/Onan KTA38 →, Cummins/Onan KTA50 →
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.