MAINTENANCE AND LUBRICA TION 249 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.

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

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

Coolant Level Check

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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 The expansion tank mounted the radiator

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