Cummins/Onan RSS100 / RSS200 — Signal Transformer Replacement Procedure
Repair & overhaul
For the Cummins/Onan RSS100 / RSS200, from the Cummins/Onan service manual.
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Before you start
- The transfer switch presents a shock hazard that can cause severe personal injury or death.
Procedure
- Move the operation selector switch on the generator to Stop (Off).
- Disconnect the external battery charger from its AC power source.
- Disconnect the generator starting battery (negative [-] lead first).
- Remove AC power to the automatic transfer switch.
- Remove the transfer switch cabinet door panel.
- Unplug the four connectors which connect to the transformer.
- Remove the two M3 nuts securing the transformer to the side of the cabinet.
- Remove the transformer.
- Install the new transformer with the same orientation as the old one.
- Plug the four connectors which connect to the transformer.
- Restore power.
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.