252 MAINTENANCE AND LUBRICATION Note: ALWAYS mix the water/antifreeze solution before pouring it into the cooling system. Note: The piping arrangement may cause capacity variation depending on the type of cooling system and optional external cooling devices which may be attached. Therefore, it is difficult to tell exactly how much coolant it will take to fill any one particular system.
CAUTION Do NOT use coolant solutions which contain anti-leak additives in trucks equipped with coolant filters or conditioners.
CAUTION Do NOT use soluble oil-type coolants in any MACK cooling system.
Cooling System Maintenance The cooling system must be maintained by performing regularly scheduled maintenance as outlined in the Maintenance and Lubrication Manual (TS494). Cold weather operations, however, place added demands on the cooling system. Prevent potential cold weather problems by performing a quick check of the cooling system as outlined below: • Make a general check for cooling system leaks. • Inspect hoses and clamps for leaks and condition. Tighten hose clamps to specifications (as required). • Check coolant level. Add fresh coolant (in specified concentration) as necessary. • Check and record degree of antifreeze concentration. Add antifreeze as necessary to obtain required protection level. For additional information concerning the cooling system, refer to the Maintenance and Lubrication Manual (TS494).
