Brake System Leak Check; Bleeding Of The Brakes After A Unit Has Been Changed - Piper ARROW III Service Manual

7-72. BRAKE SYSTEM LEAK CHECK.

a. Pull for a good firm hand brake and lock parking brake mechanism system to stand for approximately
10 minutes; then by gripping the parking brake handle, it should not be able to be pulled aft further
than the original set. Should the handle be able to be pulled towards the panel and feel spongy, a leak
is present at some point in the system. This leak may appear at any one of the connections throughout
the system or internally in the master brake cylinder or wheel brake assemblies.

7-73. BLEEDING OF THE BRAKES AFTER A UNIT HAS BEEN CHANGED.

a. Actuate the hand brake handle 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 handle sponge feeling
should be displaced by this action. Retighten B nuts.
b. Actuate the master cylinder and the toe brake cylinder of the side unit which was changed and bleed
fluid through the brake assembly on the wheel by pumping pressure and cracking bleeder until
pressure drops.
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.
Revised: 2/13/89
* CHEROKEE ARROW III SERVICE MANUAL
CAUTION
INTENTIONALLY LEFT BLANK
LANDING GEAR AND BRAKE SYSTEM
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