Cummins/Onan 6.5NH - 3CR / 6000 A — Crankshaft Endplay Check and Adjustment
Adjustments
For the Cummins/Onan 6.5NH - 3CR / 6000 A, from the Cummins/Onan service manual.
Applies to: Cummins/Onan NH engine
Procedure
- After the rear bearing end plate has been tightened to the recommended torque, check the crankshaft endplay.
- If there is too much endplay, remove the rear bearing end plate.
- Add a shim between the thrust washer and plate.
- Reinstall the end plate making sure the thrust washer and shim notches line up with the lock pins.
- Torque and recheck the endplay of the crankshaft.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Cummins/Onan service 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.