Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 836 / 1956

PAGE 10
Feb 28/07
4F10
32-40-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
C. Brake Bleeding After a Unit Has Been Changed
CAUTION: DO NOT ALLOW PRESSURE TO BLEED OFF BEFORE CLOSING BLEEDERS, FOR
THIS WILL ALLOW AIR TO ENTER THE SYSTEM. REPEAT THE PUMPING AND
BLEEDING APPROXIMATELY 10 OR MORE TIMES OR UNTIL ALL THE AIR IS
RELEASED FROM THE SYSTEM. DURING ALL BLEEDING, FLUID LEVEL OF THE
RESERVOIR MUST BE MAINTAINED.
(1) Actuate the toe brakes until some pressure builds up in the system. At this time crack the
attaching B nuts at any of the hose connections of the replaced unit. Most of the brake pedals’
spongy feeling should be displaced by this action. Tighten B nut.
(2) Actuate the toe brake/ master cylinder on the side on which the unit has been replaced. Bleed
fluid through the wheel brake assembly by pumping pressure and cracking bleeder until the
pressure drops.
9. Brake System Leak Check
A. Push on the toe brakes for a good firm pressure and lock the parking brake mechanism.
B. Allow the system to stand for approximately 10 minutes, then, by pushing the toe brakes, they
should not be able to be pushed forward further then the original set.
C. If the toe brakes can be pushed forward and feel spongy, a leak is present at some point in the
system.
D. This leak may appear at any one of the connections throughout the system or internally in the toe
brake master cylinder or wheel brake assemblies.
10. Parking Brake Valve
A. Removal
(1) Disconnect the parking brake cable from the valve actuating arm.
(2) Disconnect the fluid lines from the valve.
(3) Remove the screws that attach the valve to its mounting bracket.
(4) Place a protective material over the line openings to prevent contamination of the system.
B. Installation
(1) Attach the valve to the bulkhead mounting bracket with screws.
(2) Connect the fluid lines to the valve.
(3) Connect the control cable to the valve lever.
C. Disassembly
(1) Remove the two fittings from the outside of the valve body. A valve spring is held in place by
the fittings. Use caution not to loosen these when removing the fittings.
(2) From the valve body, remove the valve spring and valve.
(3) To remove the valve cam, remove the nut, washer, bushing and spring. Pull the cam from the
valve body.
D. Assembly
(1) Install O-rings on valve cam.
(2) Lubricate O-rings with fluid (MIL-H-5606), insert cam into valve body and secure with spring,
bushings, washer and self-locking nut.
(3) Install O-ring on the valve, insert valve in hole of out port, install valve spring and secure with
outlet fitting.