Wheel And Brakes; Main Wheel Assembly; Removal And Disassembly Of Main Wheel - Piper PA-31-350 Maintenance Manual

PIPER AIRCRAFT
T-1020
MAINTENANCE MANUAL
INSTALLATION OF GEAR DOOR ACTUATING CYLINDER.
1. Position the cylinder on its mounting bracket and secure with attachment bolt.
2. Extend the cylinder control rod enough to attach the rod end to the door and secure with attachment
bolt.
3. Connect the hydraulic lines to the cylinder.
4. To bring the gear door back to the closed position, turn the master switch ON, place the gear selector
switch in the down position and actuate the hand pump until the door closes.
HIGH ALTITUDE GEAR OPERATION.
Should it be necessary to operate the landing gear above 15,000 feet, the landing gear selector may return
to its neutral position before the gear door closing cycle is complete. If this occurs, manual override of the time
delay cycle must be used to close the gear doors.
During gear extension, if the selector returns to neutral at the same time the gears are locked down, and
before the gear doors have had time to close, again select the gear down position and hold the handle down
for an additional 3 to 4 seconds. This allows completion of the door closing cycle.
During gear retraction, if the selector returns to neutral and the gear unsafe light remains lit, again select
the gear up position and hold the handle up for 4 seconds after the gear unsafe light extinguishes. Be sure that
the light has extinguished before exceeding the maximum gear extended speed.
WHEELS AND BRAKES.
MAIN WHEEL ASSEMBLY.
REMOVAL AND DISASSEMBLY OF MAIN WHEEL. (Refer to Figure 32-15.)
1. Place the airplane on jacks. (Refer to Jacking, Chapter 7.)
2. To remove the main wheels, remove the bolts that join brake cylinder and lining back plate
assemblies.
3. Remove the brake assembly.
4. Remove the snap ring that secures the axle hub cap. Remove the cotter pin and axle nut. Slide the
wheel off the axle.
5. The wheel may be disassembled by removing the valve core and completely deflating the tire. Break
tire bead from wheel by using a mallet. Remove the wheel through bolts. Separate the wheel halves from the
tire by removing the wheel half opposite the valve stem first and then the other half.
-CA UTION-
Do not pry between the wheel flange and tire bead with sharp tools,
as this could damage the wheel and tire.
6. Remove the bearing cone by removing snap ring securing the grease seal and seal retainers. The
bearing cup should be removed only for replacement.
32-41-01
Page 32-45
Revised: November 17, 1983
3F11