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Home›Repair guides›If the cabinet must be opened for any reason:

Cummins/Onan — If the cabinet must be opened for any reason:

For these Cummins/Onan models: LT III, TGHAA.

Applies to: Cummins Onan Lt Iii, Cummins Onan Tghaa

Before you start

  • use extreme caution due to the danger of

Procedure

  1. 1. Move the operation selector switch on the gen- erator set or Stop/Auto/Handcrank switch on the automatic transfer switch (whichever ap- plies) to Stop.
  2. 2. Disconnect the starting batteries of the genera- tor set (remove the ground [–] lead first).
  3. 3. Remove AC power to the automatic transfer switch. If the instructions require otherwise, shock hazard.

Source: manual:913-0503 Onan LT III 30-260 Service Manual (2-1997).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.