Piper SARATOGA PA-32-301 Maintenance Manual page 340

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
7. Tighten brake bleeder and remove the plastic tube.
8. Repeat Steps 1 through 6 to the left main landing gear.
BRAKE BLEEDING PROCEDURE (PRESSURE).
1. Place a clean, clear plastic tube on the vent fitting on top of the brake fluid reservoir. Extend the free
end of the tube to a container partially filled with hydraulic fluid (MIL-H-5606). Be certain the end of the tube
is submerged in the fluid.
2. Attach another clear plastic tube to the brake bleeder of the right landing gear. Connect the free end
of this tube to the pressure source. Open the bleeder 1 to 2 turns and pressure fill the system with fluid.
3. With fluid continually flowing through the system. SLOWLY and simultaneously actuate the hand
brake and toe brake pedal. of the side being bled, several times to purge the cylinders of air. On dual brake
installations, both pedals for the brake being bled must be actuated.
-- NOTE -
By watching the fluid pass through the plastic hose at the fluid
reservoir and the bleeder fitting on the gear being bled, it can be
determined whether any air is left in the system. If air bubbles are
evident, filling of the system shall be continued until all the air is out
of the system and a steady flow offluid is obtained Should the brake
handle remain spongy, it may be necessary to disconnect the bottom
of the toe brake cylinders (next to the pedal) and rotating the
cylinder horizontally or even above horizontal and by use of the
hand brake alone, purge the air from the system.
4. Close the open bleeder fitting to which the pressure hose is attached. Do not remove the tube from the
fluid reservoir until both brakes have been bled. Check the brakes on the side being bled for proper pedal
pressure. Replace cap on bleeder fitting.
- 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 Steps 2 through 4 to the left main landing gear.
6. Drain excess fluid from the reservoir to fluid level with a syringe.
BRAKE SYSTEM LEAK CHECK.
Pull for a good. firm hand brake and lock parking brake mechanism. Allow system to stand for
approximately 10 minutes. then by gripping the park 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.
32-43-19
Page 32-28
2C23
Revised: August
11.
1983