Piper PA-28-161, Maintenance Manual

Page: 519 / 1104

PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 5
Nov 30/06 3E15
32-40-00
2. Brakes
A. Brake Adjustment, Conditioning, and Lining Tolerances
(1) No adjustment of the brake lining clearance is necessary as they are self-adjusting. Inspection
of the lining is necessary, and it may be inspected visually while installed on the airplane.
NOTE: The linings are riveted non-asbestos organic material and should be replaced if the
thickness of any one segment becomes worn below 0.100 of an inch or unevenly
worn.
(2) If new replacement brake linings are installed, condition them as follows:
(a) Taxi aircraft for 1500 feet with engine at 1700 RPM while applying sufficient brake pedal
force to limit taxi speed to 5-10 MPH.
(b) Allow brakes to cool for 10 to 15 minutes.
(c) Apply brakes and check for brake effectivity at high static throttle. If brakes hold,
conditioning is complete.
(d) If brakes cannot hold aircraft during static run up, allow brakes to completely cool and
repeat steps (a), (b), and (c).
B. Wheel Brake Assembly (Refer to Figure 3.)
(2) Removal and Disassembly
(a) To remove the brake assembly:
1 Disconnect the brake line from the brake cylinder at the tube fitting.
2 Remove the two cap bolts that join the brake cylinder housing and the lining back
plate assembly.
3 Remove the back plate from between the brake disc and wheel.
4 Slide the brake cylinder housing from the torque plate.
5 Remove the pressure plate by sliding it off the anchor bolts of the housing.
6 Remove the piston by injecting low air pressure in the cylinder fluid inlet and forcing
the piston from the housing.
7 Check Anchor Bolt for wear.
(b) To remove anchor bolt: (See Figure 4.)
1 Position cylinder assembly on a holding fixture.
2 Use a suitable arbor press to remove the anchor bolt from the cylinder body.
(c) Install anchor bolt by the following procedure:
1 Support Anchor Bolt in a holding fixture. (Refer to Figure 4, Step A).
2 Align cylinder body over anchor bolt. (Refer to Figure 4, Step B).
3 Use a suitable arbor press and apply pressure on the spot face directly over the
anchor bolt hole. (Refer to Figure 4, Step C).
(3) Cleaning, Inspection, and Repair
(a) Clean the assembly with a suitable solvent and dry thoroughly.
(b) Check the wall of the cylinder housing and piston for scratches, burrs, corrosion, etc., that
may damage O-rings.
(c) Check the general condition of the brake bleeder screw and lines.