Piper SEMINOLE PA-44-180, Maintenance Manual

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BRAKE CYLINDER. (Toe Brake)
REMOVAL OF BRAKE CYLINDER. (Refer to Figure 32-19.)
1. Disconnect the upper and lower lines from the cylinder to be removed and cap the lines to prevent fluid
leakage or drain the fluid from the brake reservoir and master cylinder.
2. Remove cotter pins and clevis pins securing brake cylinder in position, then remove brake cylinder.
DISASSEMBLY OF BRAKE CYLINDER.
1. Gar-Kenyon cylinder number 17000. (Refer to Figure 32-19.)
A. Remove the cylinder from its mounting bracket.
B. To disassemble the cylinder, first remove the piston rod assembly by unscrewing the fitting from the
cylinder.
C. The piston rod assembly may be disassembled by first removing the retaining ring securing the sleeve
and then removing the spring, piston, seal, fitting, and, if desired, the large return spring.
D. Remove the O-rings from the piston and fitting.
2. Cleveland cylinder number 10-27. (Refer to Figure 32-20.)
A. Remove the cylinder from its mounting bracket.
B. To disassemble the cylinder, first remove the piston rod assembly by removing the retaining ring from
the annular slot in the cylinder housing. Draw the piston rod assembly from the cylinder.
C. The piston rod assembly may be disassembled by first removing the roll pin, spring, and then the
piston assembly, seal and packing gland and, if desired, the large return spring.
D. Remove the O-rings from the piston and packing gland.
3. Cleveland cylinder number 10-30. (Refer to Figure 32-21.)
A. Install new O-rings on the inside and outside of the packing gland and on the outside of the piston.
B. To assemble the piston rod assembly, install on the rod, in order, the roll pin, washer, spring, washer,
packing gland with O-rings, seal, piston assembly with O-ring, spring and roll pin.
C. Insert the piston rod assembly in the cylinder and secure with the retaining ring.
D. Install the cylinder.
CLEANING, INSPECTION AND REPAIR OF BRAKE CYLINDER.
1. Clean cylinder components with a suitable solvent and dry thoroughly.
2. Inspect interior walls of cylinder for scratches, burrs, corrosion, etc.
3. Inspect general condition of fitting threads.
4. Inspect piston for scratches, burrs, corrosion, etc.
5. Repairs to the cylinder are limited to polishing out small scratches and burrs, and replacing seal and O-
rings.
ASSEMBLY OF BRAKE CYLINDER. (Refer to Figures 32-19 and 32-20.)
— Note —
Rub a small amount of hydraulic fluid (MlL-H-5606) on all O-rings and component
parts for ease of handling during reassembly and to prevent damage.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3 2 - 4 4 - 1 6
Page 32-51
Revised: May 15, 1989
2H19
PIPER AIRCRAFT