MAINTENANCE AND LUBRICA TION

Ethylene glycol propylene glycol - based antifreezes are both approved for all MACK All ethylene glycol and propylene glycol coolants must low - silicate antifreezes which meet ASTM4985 test (GM6038M SPEC) These antifreezes are sometimes referred heavy - duty diesel Passenger car coolants NOT meet this sure maintain the required level antifreeze protection for anticipated winter temperatures your area operation. A 40% 60% concentration antifreeze required for engines, regardless application, geographic location ambient air temperature.

Caution

NOT exceed a 60% concentration antifr eeze water A higher per centage antifr eeze will not incr ease Concentrations over 60% adversely affect eeze otection and heat transfer

Note: Propylene glycol should checked with a refractometer

Note: W A mix the water/antifreeze solution before pouring into the cooling system.

Note: The piping arrangement may cause capacity variation depending the type cooling system and optional external cooling devices which may attached. Therefore, dif ficult tell exactly how much coolant will take fill any one particular

Caution

NOT use coolant solutions which contain anti - leak additives trucks equipped with coolant filters

Caution

NOT use soluble oil - type coolants any MACK cooling system.