Cummins/Onan 1400 / 2.0UF-232S/32 — Brush Rig Setting

Adjustments · Brush rig / end bell

For the Cummins/Onan 1400 / 2.0UF-232S/32, from the Cummins/Onan operator's manual.

Applies to: Cummins/Onan 1400

Procedure

1. Remove the end cover and band to allow access to brush rig.
2. Loosen the four cap screws holding the brush rig to the end bell.
3. Mark the new brush rig in the same location as the old one with a reference mark.
4. Make sure the brush rig is free to rotate; rotate the rig back to the original location, start unit and run at rated rpm.
5. Stop unit and inspect brush faces; they must be seated across the thickness of the brush.
6. With a DC voltmeter (0-30 range) attached across the positive and negative brushes, start unit and run at rated rpm and no load.
7. Rotate brush rig in one direction until voltage starts to drop (or sparking occurs); mark this point.
8. Rotate in opposite direction until voltage starts to drop (sparking occurs); mark this point.
9. Approximately halfway between these two marks peak voltage should be reached.
10. Stop unit and tighten all four brush rig cap screws.
11. Start unit again to make sure DC voltage is the same as Step 8 and that no sparking (or arcing) occurs.
12. Mark the ring of the brush rig and end bell with a notch or paint.

Full service-parts list: Cummins/Onan 1400 →

Source: Cummins/Onan operator's 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.

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