3. Use a suitable arbor press and apply pressure on the spot face directly over the anchor bolt hole.(Refer
7-32. CLEANING, INSPECTION AND REPAIR OF WHEEL BRAKE ASSEMBLIES.
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.
d. Check the brake disc for grooves, scratches, pits or coning. Coning beyond .015 in either direction would
be cause for replacement. A single groove or isolated grooves up to 0.031 of an inch deep would not necessitate
replacement, but a grooving of the entire surface would reduce lining life and should be replaced. If a powdery
rust appears on the disc, one or two taxi-braking applications should clear the rust up. Heavier rust may require
removal of the disc to wire brush it. Then finish sand with 220 grit sandpaper. Should it be necessary to remove
the wheel disc, refer to paragraph 7-25.
e. Lining may be removed from the backing plates by drilling or punching out the old rivets, and installing a
new set using the proper rivets and a rivet set that will properly stake the lining and form a correct flare of the
rivet. (A rivet setting kit is available through Piper Dealers under part number 754 165) After replacing brake
linings, condition them as follows:
Perform a minimum of six light pedal effort braking applications from 25 to 40 MPH. Allow the brake discs to
partially cool between stops.
7-33. ASSEMBLY AND INSTALLATION OF WHEEL BRAKE ASSEMBLY. (Refer to Figure 7-9.)
a. Lubricate the piston O-ring with fluid MIL-H-5606 and install on piston. Slide the piston in cylinder
housing until flush with surface of housing.
b. Slide the lining pressure plate onto the anchor bolts of the housing.
c. Slide the cylinder housing assembly on the torque plate of the gear.
d. Position the lining back plate between the wheel and brake disc. Install the two bolts to secure the
assembly.
e. Connect the brake line to the brake cylinder housing.
f. Bleed the brake system as described in paragraph 7-46.
7-34. BRAKE MASTER CYLINDER. (Hand Parking Brake.)
7-35. REMOVAL OF BRAKE MASTER CYLINDER. (Hand Brake.) (Refer to Figure 7-12.)
of the cylinder and allow fluid to drain from the reservoir and line into a suitable container.
b. Disconnect the pressure line from the fitting on the cylinder and allow fluid to drain from the cylinder line.
c. Disconnect the end of the cylinder rod from the brake handle (6) by removing the cotter pin that safeties
the connecting clevis pin (9). Remove the clevis pin and spacer washers.
d. Disconnect the base of the cylinder from its mounting bracket by removing the attaching bolt
e. The handle assembly may be removed by removing the attaching bolt assembly that secures the handle to
its mounting bracket.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
LANDING GEAR AND BRAKE SYSTEM
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