Cummins/Onan 4MCCK / 605MCCK — Brush Rig Alignment
Adjustments
For the Cummins/Onan 4MCCK / 605MCCK, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 605MCCK, Cummins/Onan MCCK, Cummins/Onan MCCK engine
Before you start
- If a voltmeter is not available, use the same procedure but mark the point where arcing begins.
Procedure
- With the generator end cover and band removed, connect a voltmeter across the DC terminals.
- Start the unit and apply full rated load.
- Loosen the brush rig mounting screws and rotate the rig to get the highest voltage.
- Rotate the rig in one direction until the voltmeter reading starts to decrease; mark this point.
- Repeat step 3 in the other direction.
- Half the distance between the two marked points is the neutral position.
Tools required
- voltmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan 605MCCK →, Cummins/Onan MCCK →
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.