Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
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Preventive Maintenance<br />
CAUTION: During extreme cold weather, do not<br />
blow hot air onto cold windshields. This could<br />
crack the glass. Turn the air direction lever to<br />
Defrost and reduce the fan speed while the<br />
engine warms. If the engine is already warm,<br />
move the temperature selector to Cool, then<br />
gradually increase the temperature when you<br />
see that the windshield is starting to warm-up.<br />
Air Conditioner<br />
WARNING! The air conditioning system is under<br />
pressure. If not handled properly during servicing,<br />
it could explode, causing injury to you and<br />
damage your vehicle. Any servicing that<br />
requires depressurizing and recharging the air<br />
conditioning system must be conducted by a<br />
qualified technician with the right facilities to do<br />
the job.<br />
Heater and Air Conditioner<br />
• Check the compressor and drive clutch for noise and<br />
vibration. If you find problems, have the system checked<br />
thoroughly. A malfunctioning clutch usually indicates<br />
trouble elsewhere in the system.<br />
• Check the evaporator core and condenser core for<br />
debris restricting air flow. Clean if necessary. Small particles<br />
may be removed with compressed air blown through<br />
the core in the opposite direction of normal air flow.<br />
WARNING! Wear eye protection any time<br />
you blow compressed air. Small particles<br />
blown by compressed air could injure your<br />
eyes.<br />
• Check the compressor belt for condition and proper tension.<br />
• Check all hoses for kinks, deterioration, chafing, and<br />
leaks. Adjust kinked or chafing hoses to eliminate restrictions<br />
and prevent further wear.<br />
• Check all components and connections for refrigerant<br />
leaks. If you discover a leak, do not try to tighten a connection.<br />
Tightening a connection may cause a worse<br />
leak. Have a qualified technician correct the problem.<br />
NOTE: A leaking evaporator or condenser core<br />
cannot be repaired; it must be replaced.<br />
Have the air conditioning system fully serviced annually by<br />
your <strong>Peterbilt</strong> Dealer or Authorized Service Center. Qualified<br />
service technicians will have to evacuate and recharge the<br />
system.<br />
<strong>Medium</strong> <strong>Duty</strong> (R10/06) Y53-6008 – 181 –
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