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Cummins/Onan AT U C D ‘400 - 4X / 11 10 C — replace with the 24-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 9 is a 2 to 3 wire converter, number300-
  2. 0937 module.
  3. If module 10 is a 12-volt battery voltage sensor,
  4. volt, number 300-0797 sensor module.
  5. 400 ampere AT only: Remove the one screw from
  6. Swing the meter-lamp panel outward.
  7. Remove “LO BAT VOLT” lamp DS1.3and “HI BAT

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.