Piper Arrow IV Turbo Maintenance Manual page 88

5. With the airplane raised, compress and extend the gear strut several times to ascertain that the strut
actuates freely. The weight of the gear fork and wheel should extend the strut.
6. Clean off overflow of fluid and inflate the strut as described in Inflating Oleo Struts.
7. Check that fluid is not leaking around the strut piston at the bottom of the housing.
INFLATING OLEO STRUTS.
After making certain that an oleo strut has sufficient fluid, attach a strut pump to the air valve and inflate
the oleo strut. The strut should be inflated until the correct inches of piston is exposed with normal static load
(empty weight of the airplane plus full fuel and oil) on the gears. Rock the airplane several times to ascertain
that the gear settles back to the correct strut position. (If a strut pump is not available, the airplane may be
raised and line pressure from a high pressure air system used. Lower the airplane and while rocking it, let air
from the valve to bring the strut down to the proper extension. (Before capping the valve, check for valve core
leakage.)
BRAKE SYSTEM.
The brake system incorporates a hydraulic fluid reservoir through which the brake system is periodically
serviced. Fluid is drawn from the reservoir by the brake cylinders to maintain the volume of fluid required for
maximum braking efficiency. Spongy brake pedal action is often an indication that the brake fluid reservoir is
running low on fluid. Instructions for filling the reservoir are given in the next paragraph. When found
necessary to accomplish repairs to any of the brake system components, or to bleed the system, these
instructions may be found in Chapter 32.
FILLING BRAKE CYLINDER RESERVOIR.
The brake cylinder reservoir should be filled to the level marked on reservoir, with the fluid specified in
Chapter 6. The reservoir, located on the left side of the firewall in the engine compartment, should be checked
at every 50-hour inspection and replenish as necessary. No adjustment of the brakes is necessary, though they
should be checked periodically per instructions given in Chapter 32.
DRAINING BRAKE SYSTEM.
To drain the brake system, connect a hose to the bleeder fitting on the bottom of the cylinder and place the
other end of the line in a suitable container. Open the bleeder and slowly pump the hand brake lever and the
desired brake pedal until fluid ceases to flow. To clean the brake system, flush with denatured alcohol.
TIRES.
The tires should be maintained at the pressure specified in Chapter 6. When checking tire pressure,
examine the tires for wear, cuts, bruises and slippage on the wheel. The tire, tube, and wheel should be
properly balanced when installed with the index mark on the tire aligned with the index mark on the tube.
PIPER AIRCRAFT
PA-28RT-201 / 201T
*MAINTENANCE MANUAL
1D16
12-20-09
Page 12-09
December 1, 1978