Brake Service; Landing Gear Service - Piper cherokee WARRIOR Pilots Operating Manual

CHEROKEE WARRIOR
BRAKE SERVICE
The brake system is filled with MIL-H-5606 (peholeum base) hydraulic brake fluid. The
fluid level should be checked periodically or at each 50 hour inspection and replenished when
necessary. The brake reservoir is located on the upper left side of the fire wall in the engine
compartment. If the entire system must be refilled, fill with fluid under pressure from the brake
end of the system. This will eliminate air from the system.
No adjustment of brake clearances is necessary. If after extended service brake blocks
become excessively worn, they should be replaced with new segments.
LANDING GEAR SERVICE
The main landing gears use Cleveland 6.00 x 6 wheels, and the nose gear carries a Cleveland
5.00 x 5 wheel. All three tires are 4 ply rating, Type III tires with tubes; the main gear tires are
6.00 x 6 and the nose gear tire is 5.00 x 5. (See Tire Inflation, this Section.)
Main wheels are removed by taking off the hub cap, pin, axle nut, and the two bolts
holding the brake segment in place, after which the wheel slips easily from the axle.
The nose wheel is removed by taking off the axle nut and washer from one side, sliding out
the axle rod and plugs, lightly tapping out the axle tube, and then removing the wheel and
spacer tubes from between the fork. Wheels are replaced by reversing the procedure.
Tires are removed from the wheels by deflating the tire, removing the through bolts, and
separating the wheel halves.
Landing gear oleo struts should be checked for proper strut exposure and visible leaks. The
required extensions for the struts under normal static load (empty weight of airplane plus full
fuel and oil) are 3.25 inches for the nose gear and 4.50 inches for the main gear. If the strut
exposure is below that required, it should be determined whether air or oil is needed by first
raising the airplane on jacks. Depress the valve core to allow air to escape from the strut housing
chamber. Remove the filler plug and slowly raise the strut to full compression. If the fluid is
then visible up to the bottom of the filler plug hole, only proper extension with air is required.
If fluid is below the bottom of the filler plug hole, oil should be added. Replace the plug
with the valve core removed. Then attach a clcar plastic hose to the valve stem of the filler plug
and submerge the other end in a container of hydraulic fluid (MlL-H-5606). Fully compress and
extend the strut several times, thus drawing fluid from the container and expelling air. The
torquie link assembly must be disconnected to let the strut be extended a minimum of l0
inches. (The nose gear torque links need not be disconnected.) DO NOT allow the strut to
extend beyond l2 inches. When air bubbles cease to flow through the hose, fully compress the
strut, remove the f,rller plug, and again check the fluid level. When the fluid level is correct,
disconnect the hose, reinstall the valve core, the filler plug, and the main gear torque links-
With the fluid in the strut housing at the proper level, attach a strut pump to the air valve.
With the airplane on the ground under normal static load, inflate the oleo strut to the proper
strut exposure.
HANDLING AND SERVICING
ISSLJED: JULY 17,1973
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