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When air bubbles cease to flow through the hose, compress the strut fully and
again check fluid level. Reinstall the valve core and filler plug, and the main gear
torque links, if disconnected.
With fluid in the strut housing at the correct level, attach a strut pump to the air
valve and with the airplane on the ground, inflate the oleo strut to the correct
height.
In jacking the Cherokee for landing gear or other service, a jack kit (available
through Piper Dealers or Distributors) should be used. This kit consists of two
hydraulic jacks and a tail stand. At least 250 pounds of ballast should be placed
on the base of the tail stand before jacking up the airplane. The hydraulic jacks
should be placed under the jack points on the bottom of the wing and the
airplane jacked up until the tail skid is at the right height to attach the tail stand.
After attaching the tail stand, and adding the ballast, the jacking may be
continued until the aircraft is at the height desired.
BRAKE SERVICE
The brake system is filled with MIL-H-5606 (petroleum base) hydraulic brake
fluid. This should be checked at every 100 hour inspection and replenished when
necessary by filling the brake reservoir on the firewall to the indicated level. If
the system as a whole has to be refilled with fluid, this should 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.
TIRE INFLATION
For maximum service from the tires on the Cherokee, keep the tires inflated to
the proper pressure of 24 pounds for the main gear, and 24 pounds for the nose
wheel. Interchange the tires on the main wheels if necessary to produce even
wear. All wheels and tires are balanced before original installation, and the
relationship of the tire, tube and wheel should be maintained if at all possible.
Out of balance wheels can cause extreme vibration on take-off. In the
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