Cummins/Onan — Crankshaft Installation
Repair & overhaul
From a Cummins/Onan service manual covering: 205D3A, 3DJA, 3DJA-1E2236, 3DJA-3E2236. Check it applies to your exact model before use.
Applies to: Cummins/Onan DJA engine
Before you start
- Do not attempt to drive a bearing into a cold block or rear bearing plate
Procedure
- Press front and rear main bearings into place, aligning oil holes.
- Install thrust washers and locking pins.
- Oil bearing surfaces; install crankshaft from rear.
- Mount and secure rear bearing plate.
- Heat timing gear to about 350F; install key and drive gear on.
- Check end play; use gaskets/shims for .010 to .015 in.
Tools required
- electric burner or oven Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Crankshaft end play .010 to .015 in
- Heat gear to about 350F
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.