Cleaning, Inspection And Repair; Assembly; Installation; Brake Cylinder (Toe Brake) - Piper SENECA II Service Manual

7-57. CLEANING, INSPECTION AND REPAIR.

a. Clean cylinder components using a suitable solvent; then dry thoroughly.
b. Inspect interior walls of cylinder for scratches, nicks, burrs, corrosion, etc.
c. Inspect general condition of fitting threads.
d. Check piston and valve for scratches, burrs and corrosion.
e. Repairs to the cylinder are limited to polishing out small scratches and burrs and replacing washer
seal and O-rings.
7-58. ASSEMBLY. (Refer to Figure 7-16.)
a. Apply a small amount of hydraulic fluid (MIL-PRF-5606H) to component parts and O-rings.
b. Install new O-rings on inside and outside of packing gland (9) and on outside of piston (6).
NOTE: When installing teflon O-ring (5) on piston, it is suggested it be installed with the use of a
cone placed against the piston. Dimensions for constructing a cone of plastic or metal are
shown in Figure 7-16.
c. To assemble piston rod assembly, install on rod (12), in order, roll pin (14), washer (15), spring
(13), packing gland (9) with O-rings, seal (10), piston (6) with O-rings, spring (4) and bushing (3).
Secure these components with snap ring (2).
d. Insert piston rod assembly into cylinder (1) and secure packing gland with snap ring (11).
e. Install cylinder as explained in Paragraph 7-59.
7-59. INSTALLATION. (Refer to Figure 7-17.)
a. Install brake handle assembly between its mounting bracket and secure with bolt, washers, nut and
cotter pin. Washers should be placed on each side of the handle, between the bracket, and under the
nut.
b. Place cylinder (8) between the mounting bracket and secure base end with bolt, washers, nut and
cotter pin. This too should have washers placed on each side of the cylinder and under the nut.
c. Connect rod end of cylinder to the brake handle with a clevis pin and thin washers. Safety clevis
with a cotter pin.
d. Connect pressure line to fitting at bottom of cylinder.
e. Connect inlet supply line (13) to fitting at top of cylinder and secure with spring clamp.
f. Bleed brake system as explained in Paragraph 7-66 or 7-67.

7-60. BRAKE CYLINDER (TOE BRAKE).

7-61. REMOVAL. (Refer to Figure 7-17.)
a. Disconnect upper and lower lines from the cylinder (14) being removed. Cap lines to prevent fluid
leakage or drain fluid from brake reservoir and master cylinder.
b. Remove cotter pins and clevis pins (4 and 16) securing brake cylinder in position, then remove
brake cylinder.
01/01/09
PIPER SENECA II SERVICE MANUAL
1L13
VII - LANDING GEAR AND BRAKE SYSTEM