AND LUBRICA TION

Protecting the Cooling System CAUTION

The concentration ethylene glycol opylene glycol the cooling system must checked with a r efractometer prior traveling operating eas wher e subfr eezing temperatur may encounter ed. When adding antifr eeze the system, run the engine for minutes befor e checking with a r efractometer .

Note: Y our chassis currently supplied from the factory with engine coolant protection –23°C (–10°F). Optional coolant protection –40°C (–40°F) also

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 A 40% 60% concentration antifreeze required for regardless geographic location ambient air

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 Therefore, dif ficult tell exactly how much coolant will take fill any one particular https://www.truck-manuals.net/mack/

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

Cooling System Maintenance

The cooling system must maintained performing regularly scheduled maintenance outlined the Maintenance and Lubrication Manual. Cold weather operations, however , place added demands the cooling system. Prevent potential cold weather problems performing a quick check the cooling system outlined below:

• Make a general check for cooling system leaks.

• Inspect hoses and clamps for leaks and T ighten hose clamps specifications (as

• Check coolant level. Add fresh coolant (in specified concentration) necessary .

• Check and record degree antifreeze Add antifreeze necessary obtain required protection https://www.truck-manuals.net/mack/

For additional information concerning the cooling system, refer the Maintenance and Lubrication Manual .