Cummins/Onan — Latch and Latch Pin Adjustment

Adjustments

From a Cummins/Onan service manual — check it applies to your exact model before use.

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Procedure

1. Open cabinet door of automatic transfer switch.
2. Move operation selector switch to STOP and disconnect starting battery.
3. Remove AC line voltage from the automatic transfer switch.
4. Remove the twist-lock disconnect plug.
5. Completely open the control accessory panel.
6. 400 ampere AT only: remove the one screw from the inside center support for the left cabinet door and open. Proceed to Step 8.
7. Remove the one screw on top and one screw on bottom from inside meter panel flange. Open meter panel.
8. Loosen the latch pin on the edge of the meter panel or cabinet center support, and move the latch pin up or down in the slot as necessary. Then tighten.
9. 400 ampere AT only: close the left cabinet door and reinstall the one screw. Proceed to Step 11.
10. Close the meter panel and reinstall the two screws removed in Step 7.
11. Close the control accessory panel. If more adjustment is necessary, repeat Steps 5 through 11.
12. Reconnect the twist-lock disconnect plug.
13. Restore AC line voltage to the automatic transfer switch.
14. Move operation selector switch to NORMAL or RMT, whichever applies.
15. Reconnect starting battery and close cabinet door.

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.

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