Cummins/Onan — Dipstick Calibration
Adjustments · Oil pan
From a Cummins/Onan owner's manual covering: K1800, K2000E, K38, K50, KT38, KTA38, KTA50, KTTA38, KTTA50, KtA38, KtA50, KttA38. Check it applies to your exact model before use.
Applies to: Cummins/Onan K38, Cummins/Onan K50, Cummins/Onan KTA38, Cummins/Onan KTA50, Cummins/Onan K38 and K50 engine
Before you start
- The dipstick will break if the scribe mark is too deep.
Procedure
- Drain the oil from the pan.
- Install the dipstick in the dipstick tube.
- Use clean 15W-40 oil to fill the oil pan to the specified low level.
- Remove the dipstick and scribe a mark across the dipstick at the oil level. Mark the low level with an L.
- Install the dipstick and add additional oil to the specified full level.
- Remove the dipstick and scribe a mark across the dipstick at the oil level. Mark the high oil level with an H.
Tools required
- scribe Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- With a fill to the high oil level, oil can start to flow from the 1/8 inch pipe plug at the center of the pan adapter.
Full service-parts list: Cummins/Onan K38 →, Cummins/Onan K50 →, 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.