Cummins/Onan B43 / B48 — Crankshaft Endplay Check
Adjustments
For the Cummins/Onan B43 / B48, from the Cummins/Onan service manual.
Applies to: Cummins/Onan B48
Procedure
- Tighten rear bearing end plate to specified torque.
- Measure crankshaft endplay.
- If too much endplay, remove rear bearing end plate.
- Add shim between thrust washer and plate.
- Reinstall end plate with notches aligned to lock pins.
- Torque and recheck endplay.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Crankshaft end play 0.006-0.012 in
Full service-parts list: Cummins/Onan B48 →
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.