Cummins/Onan — There are three basic objectives to be accomplished:

For these Cummins/Onan models: K19, K19 Series, KT19, KTA19, KTTA19.

Applies to: Cummins Onan K19 Series, Cummins Onan Kt19, Cummins Onan Kta19, Cummins Onan Ktta19

Procedure

1. 3. Modifications which maintain satisfactory operating temperatures with a minimum increase in maintenance of the equipment and accessories. \f satisfactory engine temperature is not maintained, higher maintenance cost will result due to the increased engine wear, poor performance and formation of excessive carbon, varnish and other deposits. Special provisions to overcome low temperatures are definitely necessary, whereas a change to warmer climate normally requires only a minimum of revision. Most of the accessories will be designed in such a way that they can be disconnected so there is little effect on the engine when they are not in use. Cold Weather Starting Aids Section 1 - Operating Instructions Page 1-6 Ki9 The two most commonly used terms associated with preparation of equipment for low temperature operation are Winterization and Arctic Specifications. Winterization of the engine and/or components so starting and operation are possible in the lowest temperature to be encountered requires:
2. 1. Use of correct materials.
3. 2. Proper lubrication, low temperature lubricating oils. Refer to Lubricating Oil Specifications, Section V.

Source: manual:Cummins Diesel KTA19 Manual 1994.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.