Piper Comanche PA-24 Service Manual page 392

PIPER COMANCHE SERVICE MANUAL
6-102. Removal Of Brake Cylinder. PA-24-180 and PA-24-250. Serial Nos. 24-217S. 24-2298 and uaA
PA-24-260. PA-24-400
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a. Disconnect the upper and lower brake lines from the cylinder and cap the lines to prevent leakage
or drain the fluid from the reservoir and cylinder.
b. Remove the cylinder from its attachment fittings by removing the attaching cotter pins. nuts. washer
a nd clevis bol ts
c. Remove parking brake cable from cylinder by removing attaChing clamp at the top of the cylinder
and loosening the set screw and pulling the cable from the arm.
6-103 Disassembly Of Brake Cylinder. (Refer to Figure 6-37)
a. Loosen the gland packing nut
(7)
and slide the piston rod assembly (8) out of the cylinder assembly
( IS).
b Remove the snap ring (14) at the bottom of the piston rod assembly and slide off bushing (13).
spring (12). piston (10). washer (9). packing nut (7) and spring (4).
c.
Remove the nut (24). washer (23). spring (22). bushing (21) and "0" ring (20) attaChing the parking
brake arm (2S) to the cylinder housing (IS)
d. Remove the lower fluid line fitting ( 19) and pull out the spring (18).
~O"
ring ( 17) and valve ( 16)
6-104. Cleaning. Inspection And Repair Of Brake Cylinder.
a. Clean the cylinder parts with a suitable solvent and dry thoroughly.
b. Inspect the interior walls of the cylinder for scratches. burrs. corrosion. etc.
c. Inspect the general condition of the fitting threads of the cylinder.
d. Check the piston and valve for scratches. burrs. corrosion. etc.
e. Repairs to the cylinder are limited to polishing out small scratches. burrs. etc .. and replacing valv.
washer. seal and
~O"
rings
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6-IOS. Assembly Of Brake Cylinder. (Refer
to
Figure 6-37)
NOTE
Use a small amount of hydraulic fluid (M IL-H-5606) on the "0" ring
and component parts
to
prevent damage and ease of handling
during reassembly.
a Install the "0" ring (17) on the parking valve (16) and insert it into the cylinder housing
b. Install spring (18) and fluid line fitting (19).
c
Slide the actuating arm (2S) into the cylinder housing and install ·0" ring (20). bushing (21).
spring (22). washer (23) and secure with nut (24).
d
Install "0" ring on inside (S) and outside (6) of gland packing nut
(7).
e. Slide spring. gland packing nut
(7).
washer (9). piston (10) with "0" ring (II). spring ( 12) and
bushing (13) on piston rod (8) and secure with snap ring (14).
f. Insert the piston rod assembly into the cylinder assembly and tighten gland nut.
REVISED: 4/10/81
IL2
LANDING GEAR AND BRAKE SYSTEtt