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Medium Duty Operator's Manual - Peterbilt Motors Company

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Engine Cooling System<br />

Preventive Maintenance<br />

Use a solution of half ethylene glycol antifreeze and half<br />

water for best heater performance. Do not use more than 65<br />

percent concentration of antifreeze, as a shortened heater<br />

life will result.<br />

After servicing the cooling system, operate the vehicle for a<br />

day or two before using the heater. Trapped air inside the<br />

engine needs time to escape.<br />

PREVENTIVE MAINTENANCE (PM) INTERVALS<br />

I A B C D E<br />

At the first 15,000 mi./<br />

24,000 km or at the first<br />

PM<br />

15,000 mi./24,000 km/<br />

Monthly<br />

30,000 mi./48,000 km 60,000 mi./96,000 km/<br />

6 months<br />

120,000 mi./<br />

192,000km / Annually<br />

240,000 mi./384,000 km<br />

SYSTEM COMPONENT MAINTENANCE TASK<br />

Recommended<br />

PM Interval<br />

I A B C D E<br />

– 178 – Y53-6008A <strong>Medium</strong> <strong>Duty</strong> (R05/09)

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