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: Do not use penetrating oil, brake<br />
fluid, or wax-based oils in the air system. These<br />
fluids may cause severe damage to air system<br />
components.<br />
• Maintain the air compressor to prevent excessive oil bypass.<br />
See the <strong>Medium</strong> <strong>Duty</strong> Maintenance <strong>Manual</strong> for<br />
maintenance details.<br />
• Replace worn seals in valves and air motors as they are<br />
needed. Your <strong>Peterbilt</strong> Dealer carries rebuild kits for most<br />
units.<br />
Air System<br />
service center) if a leak is detected. Failure to check the<br />
brakes or follow these procedures could cause a system<br />
failure, increasing the risk of an injury accident.<br />
FRONT<br />
SECONDARY<br />
SERVICE<br />
CIRCUIT<br />
(WHITE)<br />
Dual Air Gauge and Air Leaks<br />
Your <strong>Medium</strong> <strong>Duty</strong> comes with a dual-circuit air pressure<br />
gauge for two separate systems, Primary and Secondary:<br />
the WHITE pointer indicates pressure in the front (Secondary)<br />
braking circuit; the ORANGE pointer indicates pressure<br />
in the rear (Primary) braking circuit. The gauge indicates the<br />
amount of air pressure in pounds per square inch (psi).<br />
WARNING! Do not operate the vehicle if leakage<br />
in the air system is detected. Conduct the following<br />
procedure and contact an Authorized Service<br />
Center (or any other properly equipped<br />
02581<br />
Dual Air Pressure Gauge (Air Reservoir)<br />
REAR<br />
PRIMARY<br />
SERVICE<br />
CIRCUIT<br />
(ORANGE)<br />
If the pressure in either or both systems is too low for normal<br />
brake operation, i.e., either pointer falls below 60 psi (414<br />
kPa), a warning light on the gauge will glow and the audible<br />
alarm will sound. If the light and alarm do not turn off at startup,<br />
do not try to drive the vehicle until the problem is found<br />
and fixed.<br />
<strong>Medium</strong> <strong>Duty</strong> (R10/06) Y53-6008 – 163 –