Cummins/Onan — Auxiliary Contact Replacement
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Disconnect all sources of AC power from the transfer panel before servicing.
Procedure
- Check the contact with an ohmmeter; if faulty, remove by sliding the locking tab up and sliding contact off.
- Slide the new auxiliary contact into the track until a click is heard indicating the latch is engaged.
- Transfer the leads from the old auxiliary contact to the new one.
Tools required
- Ohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.