Cummins/Onan — Rotary Tap Selector Switch Replacement
Repair & overhaul · Control box selector switch
From a Cummins/Onan service manual — check it applies to your exact model before use.
Browse Cummins/Onan generators & specs →
Before you start
- Always replace the spacer washer under the snap ring when replacing the switch handle.
Procedure
- Disconnect and tag all leads from control box to generator.
- Remove bolts and screws attaching control box; lift assembly off generator.
- Drive roll pin from selector handle with pin punch; pull handle off shaft.
- Remove snap ring from selector shaft using snap-ring pliers.
- Remove receptacle and circuit breaker mounting screws; remove terminal stud nuts.
- Remove 1/4-20 machine bolt from top-center of panel; pull panel off.
- Slide wiper blade, tension spring and operating shaft out as a unit.
- Reassemble leads to new selector panel with screw type connectors.
Tools required
- Pin punch Amazon
- Snap-ring pliers (Onan Part No. 420P107) Amazon
- Hack saw or bolt cutters Amazon
- Soldering copper or low flame torch 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.