Cummins/Onan — Brushes - Replace
Repair & overhaul · Generator Brushes
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKBH
Procedure
- MDKAU Spec A: 1.5 hours in-chassis
- MDKAU Spec B and MDKBH: 0.5 hour in-chassis
- Disconnect and connect battery cables, engine wiring harness, fuel lines, exhaust hose, coolant hoses
- Drain and refill engine fluids
- Remove and install soundshield, brush block assembly
- Check brush alignment
- Test run unit
Specs & values
- SRT 25-3AB: Step 01 MDKAU Spec A 1.5 hr; Step 02 MDKAU Spec B and MDKBH 0.5 hr; in-chassis accessibility B
Full service-parts list: Cummins/Onan MDKBH →
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.