4. Close the open bleeder fitting on the gear being bled. Close the open bleeder fitting to which the
pressure hose is attached; then close the pressure unit and remove the hoses from the bleeder fittings. Check
the brakes for proper pedal pressure. Replace the caps over the bleeder fittings.
—NOTE—
It may be necessary to remove any trapped air in the top of the
wheel brake unit by applying pressure to the system with the
brake hand lever and slowly opening the bleeder and release the
hand lever.
5. Repeat this procedure, if necessary, on the other gear.
6. Drain excess fluid from the reservoir to fluid level line with a syringe.
BRAKE SYSTEM LEAK CHECK.
1. 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.
BLEEDING OF THE BRAKES AFTER A UNIT HAS BEEN CHANGED.
1. 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.
2. 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.
—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.
POSITION AND WARNING.
LANDING GEAR LIMIT SWITCHES.
—NOTE—
All adjustments of the limit switches should be made with the
airplane on jacks. (Refer to Jacking, Chapter 7.)
32-60-01
Page 32-55
December 1, 1978
2F14
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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