Brake Cylinder Installation; Brake Cylinder Bleeding - Piper PA-44-180 SEMINOLE Maintenance Manual

1. Gar-Kenyon cylinder number 17000. (Refer to Figure 32-19.)
A Install new O-rings on the inside and outside of the fitting and on the outside of the piston.
B To assemble the piston rod assembly, install on the rod, in order, the roll pin, return spring, retainer
washer, return spring, fitting with O-rings, seal, piston with O-ring, spring and sleeve. Secure these
pieces with the retaining ring on the end of the rod.
C Insert the piston rod assembly in the cylinder and secure fitting.
D Install the cylinder.
2 Cleveland cylinder number 10-27. (Refer to Figure 32-20.)
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.
3 Cleveland cylinder number 10-30. (Refer to Figure 32-21.)
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 retaining ring, sleeve, spring, and
then the piston assembly, O-ring, and gland, and, if desired, the return spring.
D Remove the O-rings from the piston and packing gland.
INSTALLATION OF BRAKE CYLINDER. (Refer to Figure 32-22.)
1 Position brake cylinder at its mounting points and secure in position with clevis pin. Safety clevis pins with
cotter pins.
2 Connect brake lines to cylinder fittings. Bleed brakes.
BLEEDING PROCEDURE.
If the brake line has been disconnected for any reason, it will be necessary to bleed the brake system as
described below:
1 Place a suitable container at the brake reservoir to collect fluid overflow.
2 Remove the rubber bleeder fitting cap located on the bottom of the brake unit housing on the landing gear.
3 Slide a hose over the bleeder fitting, loosen the fitting one turn and pressure fill the brake system with MIL-
H-5606 fluid.
By watching the fluid pass through the plastic hose at the top of the brake reservoir, it
can be determined whether any air remains in the system. If air bubbles are evident,
filling of the system shall be continued untill all of the air is out of the system and a
steady flow of fluid is obtained.
4 Tighten bleeder fitting and remove the hose. Check brakes for proper pedal pressure.
5 Repeat this procedure on the other gear.
6 Drain excess fluid from reservoir to fluid level line with a syringe.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— Note —
2H20
3 2 - 4 4 - 1 8
Page 32-52
Revised: May 15, 1989