Cummins/Onan N52M — Align Main Bearing
Repair & overhaul
For the Cummins/Onan N52M, from the Cummins/Onan service manual.
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Before you start
- Precision type - do not line bore or ream.
Procedure
- Align new bearing oil hole with oil hole in bearing bore.
- Align bearing notches with lock pins.
- Rear main bearing is pressed into rear bearing plate.
- One-piece aluminum service bearing installed only in front main bearing bore.
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.