OPERATOR'S MANUAL

Preventive Maintenance Brake System
Medium Duty
(R05/09) Y53-6027 – 191 –
It is recommended that all disc brake pads be
replaced at the same time since this will maintain bal-
anced braking. At a minimum, replace all disc brake
pads on one axle, both ends, at the same time.
Calipers
Visually inspect calipers for brake fluid leakage, dam-
aged or defective pistons or piston boots. If there is
evidence of leakage, damage, or other defects the
caliper should be replaced or repaired.
Disc brake rotors
Visually inspect rotors for scoring, warping, cracks,
bluing or heat spots or other damage or defects. If
signs of damage or defects are found, the rotor(s)
should be resurfaced or replaced in accordance with
the vehicle manufacturer's recommended service
procedure.
Anchor plates
Visually inspect anchor plates for worn or damaged
slippers, damaged or dislodged guide pin boots or
other defects. If signs of wear, damage or defects are
found, the anchor plate(s) should be repaired or
replaced.
Parking Brake Component Inspection
NOTE: If you are not properly trained to perform
brake inspections or service, take your vehicle to
your nearest Peterbilt dealer.
SYSTEM COMPONENTS
ANCHOR
PLATES
CALIPERS
FRONT REAR
BRAKE PADS
CALIPERS
ROTORS
BRAKE PADS