MAINTENANCE AND LUBRICA TION COOLING SYSTEM

The cooling system a pressurized system. The coolant circulated a centrifugal pump. a typical system most respects, but there are a few things keep mind when checking working the cooling system. W

Arning

Keep clear fan when engine running. Fan may start r otate high speed without warning. W

Arning

A void injury when checking coolant a hot engine. W ait for the engine cool prior checking the level whenever possible.

Coolant Level Check W ARNING

T urn the cooling system essur e cap counter clockwise slowly . After the essur e has completely dissipated, continue turning r emove the cap.

Y our MACK model chassis has a pressurized plastic coolant expansion tank where quick checks coolant level can made and additional coolant can added the system. The expansion tank mounted the radiator .

Periodically , the coolant level should checked observing the coolant the expansion

Draining the Cooling System

Whenever repairs are made which would require disconnection coolant hoses, etc., the cooling system should drained. Carefully remove the filler cap and remove all pipe plugs.

Refilling the Cooling System

Close all drain cocks and fill with the proper coolant Run engine with the pressure cap removed until operating temperature reached and the thermostat Recheck level and add coolant Run the engine long enough sure the system free air and has the correct amount

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 available.