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PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
A. Nose Gear and Doors (continued)
15. Removal of Wiper Strip on Gear Strut
(a) Place airplane on jacks. (Refer to 7-10-00.)
(b) Jack airplane high enough to take weight off gear.
(c) Release air pressure from strut by depressing the valve core pin until pressure has diminished.
(d) Using snap ring pliers, disengage snap ring from annular slot in the oleo housing, allowing it to
lay at the lower end of the piston tube along with the wiper strip retainer washer.
(e) Remove old wiper strip from housing and clean and inspect the housing to ensure no pieces
remain.
(f) Wipe piston tube and check It for any abrasions which could damage the new wiper. Polish
tube to remove any abrasions.
16. Installation of Wiper Strip on Gear Strut
(a) A new wiper strip must be cut with a 30 degree bevel, a little longer than needed, to circle the
piston tube.
(b) Insert new wiper strip up into the oleo housing with the tapered edge down. Slide the retainer
washer and snap ring up the piston tube. Insert them into the oleo housing. Using snap ring
pliers to compress the snap ring, install it into the annular slot in the oleo housing.
(c) Inflate the oleo strut according to instructions given in Oleo Struts (refer to 12-10-00). Remove
airplane from jack.
17. Removal of Nose Gear Door Assembly
(a) To remove gear door, disconnect retraction rod at the door and remove hinge bolts at each side
of the wheel well.
(b) To remove door retraction mechanism, be sure retraction rod is disconnected. Disconnect the
down lock spring and remove the snap ring holding the retraction mechanism on its support
shaft. Pull the retraction mechanism from shaft.
18. Installation of Nose Gear Door Assembly
(a) To install the door retraction mechanism, position and bolt unit in place. Connect the down lock
spring.
(b) The gear door is installed by aligning the bracket bolt hole with the hinge, installing bolt
assembly and securing it. Attach and secure the retraction rod.
EFFECTIVITY:
040-999
Jan 10/90
32-20-00
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