Cummins/Onan OT UCD 280 — Latch and Latch Pin Adjustment
Adjustments · Control accessory panel latch
For the Cummins/Onan OT UCD 280, from the Cummins/Onan service manual.
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Before you start
- High voltage on transfer switch terminals presents a serious personal injury hazard!
Procedure
- Open cabinet door of automatic transfer switch.
- Move operation selector switch to STOP and disconnect starting battery.
- Remove the twist-lock disconnect plug and completely open the control accessory panel.
- 100 through 280 ampere OT: remove the one screw on top and one screw on bottom from inside meter panel flange; open meter panel.
- Loosen the latch pin and move the latch pin up or down in the slot as necessary, then tighten.
- 100 through 280 ampere OT: close the meter panel and reinstall the two screws removed.
- Close the control accessory panel; if more adjustment is necessary, repeat as needed.
- Reconnect the twist-lock disconnect plug.
- Restore AC line voltage to the automatic transfer switch.
- Move operation selector switch to NORMAL or RMT, whichever applies.
- Close cabinet door.
- Reconnect starting battery.
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.