Cummins/Onan AT U C D ‘400 - 4X / 11 10 C — replace with a 300-0926 2 to 3 wire converter

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

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Procedure

1. Check battery voltage (battery must be a 12-volt
2. Connect automatic transfer switch to terminals
3. Restore AC line voltage to the automatic transfer
4. Connect the starting batteries.
5. Move the operation selector switch on the 2 to 3
6. Close the cabinet door.
7. 15 and 20-25.
8. Open the automatic transfer switch cabinet door.
9. Move the operation selector switch on 2 to 3 wire
10. Disconnect the starting batteries.
11. Remove AC line voltage from the automatic
12. Remove the wire leads between the engine con-
13. Remove 300-0926 2 to 3 wire converter module 9
14. Connect automatic transfer switch terminals
15. Restore AC line voltage to the automatic transfer
16. Connect the starting batteries.
17. Move the operation selector switch on the engine
18. Close the cabinet door.
19. 15 and 20-25.
20. Open the cabinet door.
21. Move operation selector switch to “STOP” (on
22. Remove AC line voltage from the automatic
23. Remove the twist-lock disconnect plug and open
24. Install keying plug(s),#332-2114for begin.SpecC
25. Insert the new module in,the control accessory
26. Restore AC line voltage to the automatic transfer
27. Close the controt accessory panel and reconnect
28. Move the operation selector switch to “RMT” (on
29. Close cabinet door.

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.