Regional Haul Model Operator's Manual - Peterbilt Motors Company

AIR SYSTEM
The two service tanks (or “dry” tanks), must be drained on
a weekly basis. Drain the two service tanks by opening
the drain valves. Turn valve handles counter-clockwise,
and leave open until the escaping air is free of water.
FRONT
SECONDARY
(SERVICE) TANK
PREVENTIVE MAINTENANCE
REAR PRIMARY
(SERVICE) TANK
WARNING! If the supply and service tanks are
not drained at the recommended frequency,
water could enter the air lines and valves.
This could cause corrosion or blockage,
which could compromise the brake system
safety and potentially cause an accident
involving death or injury.
DRAIN VALVE
WET (SUPPLY)
TANK UNDER
FRONT SERVICE
TANK
02602
Location of Air Tanks
Periodically: Clean filter screens ahead of the valves by
removing the screens and soaking them in solvent. Blow
them dry with pressurized air before reinstalling them.
CAUTION: Do not use penetrating oil, brake
fluid, or wax-based oils in the air system.
These fluids may cause severe damage to air
system components.
– 192 – Y53-6033 Regional Haul (R05/10)