Piper COMANCHE PA-24-180 Service Manual page 260

6-89. Brake Master Cylinder. (PA-24-10, PA-24-250, Serial Nos. 24-1 to 24-2174 incl. and 24-2176 to
24-2298 incL)
690. Removal Of Brake Master Cylinder.
a.
Access to the brake cylinder i gained through a removable portion of the floor. board, loced in
front of the pilot's seat.
b. Remove attaching screws and roll back the carpet from in front of the seat
c. Remove the panel located to the left of the nose wheel housing by removing the attaching screws
d. Disconnct the inlet supply line t the top of the cylinder and drin the fluid from the reservoir
into a suitable containr.
e.
Disconnect the pressure line at the bottom of the cylinder and allow the fluid to drain from the
cylinder.
f.
Disconnect the cylinder rod from the bellcrank by removing the cotter pin, washer and pin.
g. Remove the master cylinder from its bracket by removing the attaching cotter pin, washer and pin.
6-91. Disassembly Cleaning, Inspection And Repair Of Brake Master Cylinder. (Refer to Figure 6-35.)
Disassemble the master cylinder by removing the snap ring (3) at the top of the cylinder and
extracting the plunger assembly from the housing.
b. Remove the piston head (11). spring pin (13) nd bushing(8) from the rod (7) by driving ou the
roll pin (9).
c. Slide cap from piston rod.
d. Clean all parts in a suitable solvent.
e.
Replace all worn parts.
6-92. Assembly Of Brake Master Cylinder. (Refer to Figure 6-35.)
a.
Lubricate with hydraulic fluid and install the inner and outer "O" rings (4 and 6) on cap and slide
assembly on piston rod (7).
b. Slide the bushing (8) over the rod and the piston head (11) over the spring pin (13).
c.
Install "O" ring (10) on end of piston rod.
d. Insert the spring pin (13) into the rod and secure with roll pin (9).
e.
Install spring (14) on end of spring pin.
f. Slide the plunger assembly into the cylinder housing and secure with snap ring (3).
LANDING GEAR AND BRAKE SYSTEM
ISSUED: 8/18/72
PIPER COMANCHE SERVICE MANUAL
1K20