Winterizing Cooling System

CAUTION:

TS281-UN-23AUG88

Remove filler cap only when cool enough to touch with bare hands and with engine stopped.

Do not remove filler cap until all system pressure is relieved. Relieve pressure by slowly loosening cap to relieve pressure before removing completely.

IMPORTANT: Do not drain cooling system to protect against freezing. The heater does not drain completely, so damage would result.

Do not use a high silicate automotive coolant.

After testing, if it is determined there is insufficient antifreeze to protect the system against freezing, do the following:

• Use specified coolant with conditioner. (See DIESEL ENGINE COOLANT in Fuel, Coolant, and Lubricants section.)
• After adding antifreeze (see FILLING RADIATOR in this section), run engine until it reaches operating temperature. This mixes the solution and circulates it through the system.
• Allow engine to cool and test coolant mixture to determine level of protection. Adjust as needed.