OPERATOR'S MANUAL

Air System Preventive Maintenance
– 202 – Y53-6027
Medium Duty (R05/09)
• Check the Charge-Air-Cooler for air leaks annually. The
air leaks can be caused by cracked tubes or header. For
service see your Peterbilt Dealer or Authorized Service
Center.
Turbocharger
When servicing the air intake and exhaust systems on a tur-
bocharged engine, check the items listed below.
WARNING! Do not operate engine with the turbo-
charger intake piping disconnected. A suction is
created when the engine is running. This suction
could draw your hand or anything else near it
into the impeller fan. You could be killed or seri-
ously injured. Always keep the intake piping
connected when you will be running the engine.
Lubricating System: Check the oil lines, housing, and con-
nections. Look for leaks, damage, or deterioration. Leaks
could mean you have damaged oil lines or oil seals.
Manifold: With the engine operating, check for leaking man-
ifold or flange gaskets.
High Frequency Vibration: Vibration may indicate turbo
rotor imbalance. Have your Peterbilt Dealer or Authorized
Service Center investigate this immediately. If you detect any
deficiencies, take the vehicle to an Authorized Service Cen-
ter for servicing. Delay could lead to severe and expensive
damage to your vehicle.
Air Filter Replacement
Service the filter elements when the Air Cleaner Restriction
gauge (option) locks in the extreme High position. Have the
element serviced at a Peterbilt Dealer or Authorized Service
Center. Paper elements require care and proper handling,
because they are critical to engine service life.
Service the air cleaner periodically. If the vehicle operates in
areas with heavy dust, maintenance should be more fre-
quent. Follow the instructions below to remove the air filter.