Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
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PREVENTIVE MAINTENANCE<br />
HEATER AND AIR CONDITIONER<br />
Heater<br />
• Do not permit any open flame in the area.<br />
Even a match or a cigarette lighter may generate<br />
a hazardous quantity of poisonous<br />
gas.<br />
• Do not smoke in the area. Inhaling gaseous<br />
refrigerant through a cigarette may cause<br />
violent illness.<br />
• Check all heater controls for full-range operation.<br />
• Check hoses, connections, and heater core for condition<br />
and leaks.<br />
• Check the drain pan of the fresh air vent for trapped<br />
water before assuming that there is a leak in the heating<br />
system. If the heater core is leaking, a reliable<br />
radiator shop should be able to repair it.<br />
• Check the heater core for debris blocking the air flow.<br />
If the blower and air controls are functioning properly,<br />
yet the heater is not operating properly, the heater<br />
core or the hot water valves may be clogged or<br />
closed. Clean the heater core if necessary. If the condition<br />
persists, take the vehicle to a <strong>Peterbilt</strong> Dealer<br />
for proper heater service or repair.<br />
CAUTION: During extreme cold weather, do<br />
not blow hot air onto cold windshields. This<br />
could crack the glass. Turn the air direction<br />
lever to Defrost and reduce the fan speed<br />
while the engine warms. If the engine is<br />
already warm, move the temperature selector<br />
to Cool, then gradually increase the temperature<br />
when you see that the windshield is starting<br />
to warm-up.<br />
Air Conditioner<br />
WARNING! The air conditioning system is<br />
under pressure. If not handled properly during<br />
servicing, it could explode, causing death,<br />
injury to you or damage your vehicle. Any servicing<br />
that requires depressurizing and<br />
recharging the air conditioning system must<br />
be conducted by a qualified technician with<br />
the right facilities to do the job.<br />
• Check the compressor and drive clutch for noise and<br />
vibration. If you find problems, have the system<br />
checked thoroughly. A malfunctioning clutch usually<br />
indicates trouble elsewhere in the system.<br />
• Check the evaporator core and condenser core for<br />
debris restricting air flow. Clean if necessary. Small<br />
<strong>Regional</strong> <strong>Haul</strong> (R05/10) Y53-6033 – 211 –