Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›Service Procedure

Cummins/Onan AT U C D ‘400 - 4X / 11 10 C — Service Procedure

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

Browse Cummins/Onan generators & specs →

Procedure

  1. Move the operation selector switch on the engine
  2. Disconnect the starting batteries.
  3. Remove AC line voltage from the automatic
  4. Open the automatic transfer switch cabinet door.
  5. Remove the remote start wire leads between the
  6. Remove the 300-0937 blank (spare) module 9 and
  7. Check battery voltage (battery must be a 12-volt
  8. Connect automatic transfer switch to terminals
  9. Restore AC line voltage to the automatic transfer
  10. Connect the starting batteries.
  11. Move the operation selector switch on the 2 to 3
  12. Close the 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.