Cummins/Onan AT U C D ‘400 - 4X / 11 10 C — replace with the 12-volt time delay module 300-

For the Cummins/Onan AT U C D ‘400 - 4X / 11 10 C.

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Procedure

1. If module 10 is a 24-volt battery voltage sensor,
2. volt, number 300-0796 sensor module.
3. 400 ampere AT only: Remove the one screw from
4. Remove the one screw on top and one screw on
5. Swing the meter-lamp panel outward.
6. Remove “LO BAT VOLT” lamps DS13 and “HI
7. Close the meter-lamp panel and secure the top
8. 400 ampere AT only: Close the left cabinet door.
9. Close the contro! accessory panel and reconnect
10. Remove AC line voltage from the automatic
11. Connect a 12-volt battery and restore AC line
12. Move the operation selector switch to “RMT” (on
13. Close the cabinet door.
14. Remove the twist-lock disconnect plug and open
15. Remove the wire lead from transformer T1 ter-
16. Remove the wire lead from resistor R1 terminal
17. Remove the 12-volt module 5 (number 300-0847)

Source: manual:962-0500 Onan AT (spec A-C) Transfer Switch Service Manual (08-1979).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.