Cummins/Onan 1750DQKB / 3200 Series — Axial Alignment Procedure
Adjustments · Generator / engine alignment
For the Cummins/Onan 1750DQKB / 3200 Series, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 1750DQKB, Cummins/Onan DFE
Procedure
- Fasten dial indicator holding device to skid base, engine block, or generator shell with a magnetic base or clamp.
- Position so the sensor point of the indicator rests on the generator shaft hub.
- Bar the engine over in a clockwise rotation through a couple of rotations.
- Record indicator readings in eight equally spaced points around the shaft diameter.
- To correct out-of-tolerance T.I.R., remove the capscrews connecting drive discs and flywheel.
- Mark the drive discs and flywheel with respect to each other and rotate either the engine or generator so drive disc holes are repositioned 180 degrees from original location.
- Reinstall the drive disc capscrews and retorque; recheck shaft alignment. If unchanged, rotate discs 30, 60, or 90 degrees from original location.
Tools required
- dial indicator holding device with magnetic base or clamp Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- optimal T.I.R. for runout would be .000 inch
- reduce measured T.I.R. runout by one half
Full service-parts list: Cummins/Onan 1750DQKB →, Cummins/Onan DFE →
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.