Piper PA-24 Comanche, Service Manual

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PIPER COMANCHE SERVICE MANUAL
VI - LANDING GEAR AND BRAKE SYSTEM 04/01/09
1K14
e. The old lining can be removed by prying it from the back plate and pressure plate and a new lining
snapped into place.
NOTE: Linings should be replaced when the thickness of any one segment is 3/32 inch or less, or
the lining is worn uneven.
6-83.
Assembly and Installation of Wheel Brake Assembly.
(Cleveland 30-23 or 30-41) PA-24-180 and
PA-24-250, S/N’s 24-3296 and up; and PA-24-260 and PA-24-400. (Refer to Figure 6-29.)
a. Lubricate the piston "O" rings (4) with fluid MIL-PRF-5606 and install on piston (5). Slide the
pistons in cylinder housing (3) until flush with surface of housing.
b Slide the lining pressure plate (7) onto the anchor bolts (14) of the housing.
c. Slide the cylinder housing assembly on the torque plate ( 13) of the landing gear.
d. Position the lining back plates (12) between the wheel and brake disc. Insert the spacer block (9)
between the back plates and cylinder housing and install the four bolts (1). Torque to proper “Dry”
torque value listed below, to secure the assembly.
30-23 = 65-75 in-lbs.
30-41 = 65-75 in-lbs.
NOTE: On PA-24-400 only, install a shim (10) between the spacer block and line backing plates.
e. Connect the brake line to the brake cylinder housing.
f. Bleed the brake system as described in Paragraph 6-88.
NOTE: Replacement brake linings should be conditioned as follows:
(1) For Cleveland brake No. 30-23, perform three consecutive hard braking applications
from 45-50 mph without allowing the brake discs to cool substantially between stops.
(2) For Cleveland brake No. 30-41, perform a minimum of six light pedal effort braking
applications from 25 to 40 mph allowing the brake discs to partially cool between stops.
6-84.
Removal and Disassembly of Wheel Brake Assembly.
(Goodrich) PA-24-400 (Refer to Figure 6-30 )
a. To remove the brake assembly first disconnect the brake line from the cylinder housing (7) at the
line fitting
b Remove the three bolts (15) joining the cylinder housing (7) to the torque plate (1) and remove the
brake disc (4) and cylinder housing.
c. Remove the lining carrier (3) and insulator (2) from the torque plate and cylinder housing.
d. The pistons (5) may be removed by injecting low air pressure in the cylinder fluid inlet and forcing
the pistons from the housing.
6-84a.
Wear Limit Check.
(Goodrich) This check is made with the parking brake set. (Refer to Figure 6-30a
Any brake which shows this worn condition should be overhauled within the next five landings.