Landing Gear Service - Piper Cherokee C Owner's Handbook Manual

O
CTION V THE PIPER CHEROKEE
•
THE PIPER CHEROKEE
be done,by filling with the fluid under pressure, from the brake
end of the system. This will eliminate air from the system as
it is being filled.
No adjustment of brake clearances is necessary on the
Cherokee brakes. If after extended service the brake blocks
become worn excessively, they are easily replaced with new
segments.
LANDING GEAR SERVICE
Main wheels are easily removed by taking off the hub cap,
axle nut, and the two bolts holding the brake segment in place,
after which the wheel slips easily from the axle.
Tires are demounted from the wheels by first deflating the
tire, then removing the three through bolts, and separating the
wheel halves.
Landing gear oleo struts should be checked for proper strut
exposures and fluid leaks. The required extensions for the strut
when under normal static load (empty weight of airplane plus full
fuel and oil) is 3.25 inches for the nose gear and 4.50 inches for
the main gear. Should the strut exposure be below that required,
it should be determined whether air or oil is required by first
raising the airplane on jacks. Depress the valve core to allow
air to escape from the strut housing chamber. Reinove the fil
ler plug and slowly raise the strut to full compression. If the
strut has sufficient fluid it will be visible up to the bottom of the
filler plug hole and will then only require proper inflation.
Should fluid be below the bottom of the filler plug hole, oil
should be added. Replace the plug with valve core removed,
attach a clear plastic hose to the valve stein of the filler plug
and submerge the other end in a container of hydraulic fluid
(MIL-H-5606). Fully compress and extend the strut several
times thus drawing fluid from the container and expelling air
from the strut chamber. To allow fluid to enter the bottom
chamber of the maingear strut housing, the torque link assem-
bly must be disconnected to let the strut be extended a minimum
of 10 inches. (The nose gear torque links need not be discon-
nected.) Do not allow the strut to extend more than 12 inches.
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