Cummins/Onan — OUT-OF-SERVICE PROTECTION

For these Cummins/Onan models: Contractor, UN Revolving Armature, 4-Pole.

Applies to: Cummins Onan Contractor

Procedure

1. Run the engine until it reaches normal operating
2. Turn off the fuel supply and run the engine until it
3. Disconnect battery and store in a cool dry place.
4. Drain oil from oil base while the engine is still

Source: manual:940-0120 Onan NH (spec P) Genset Operators manual (10-1983).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.