Cummins/Onan — Auxiliary Contact Removal and Installation (30-60 Ampere)
Repair & overhaul
From a Cummins/Onan service manual covering: LT 100, LT 150, LT 200, LT 260, LT 30, LT 60. Check it applies to your exact model before use.
Applies to: Cummins/Onan TGHAA
Before you start
- AC power within the cabinet presents an electrical shock hazard. Disconnect all sources of AC power from the transfer switch before servicing.
Procedure
- If an ohmmeter check indicates a faulty contact, remove the auxiliary contact by sliding the locking tab up and sliding the auxiliary contact off the contactor.
- Slide the new auxiliary contact into the track on the contactor 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.
Full service-parts list: Cummins/Onan TGHAA →
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.