Main Gear Oleo Disassembly; Main Gear Oleo Cleaning, Inspection And Repair - Piper PA-44-180 SEMINOLE Maintenance Manual

MAIN GEAR.
MAIN GEAR OLEO.
DISASSEMBLY OF MAIN GEAR OLEO. (Refer to Figure 32-1.)
The main gear oleo assembly may be removed and disassembled from the gear oleo housing with the gear
removed from or installed in the airplane.
1. Place airplane on jacks.
2. Place a drip pan under the main gear to catch spillage.
3. Remove air and fluid from the oleo. Depress air valve core pin until strut pressure has diminished; remove
the filler plug and with a thin hose siphon as much hydraulic fluid from the strut as possible.
4. Disconnect brake line at the joint located in the wheel well.
5. To remove piston tube assembly from oleo housing, remove the upper and lower torque link connecting bolt
assembly and separate links. Note number and thickness of spacer washer(s) between the two links.
6. Compress the piston tube; reach up into the tube and release the snap ring from the annular slot at the
bottom of the oleo housing.
7. Pull piston tube with component parts from cylinder housing.
8. The piston tube components may be removed by reading in the tube and pushing out the upper bearing
retainer pins. Slide off the upper bearing, lower bearing with O-rings, wiper and washer.
9. To remove orifice tube from the oleo housing, remove locknut and washer from top of housing. Draw tube
with O-ring and retainer from housing.
10. The orifice plate is removed from the bottom of orifice tube by releasing snap ring holding the plate in
position.
11. To remove piston tube plug and O-ring located in the bottom end of the tube, remove bolt assembly and
insert a rod up through the hole in the body of the fork and push plug with O-ring from top of tube.
CLEANING, INSPECTION AND REPAIR OF MAIN GEAR OLEO.
1. Clean all parts with a suitable dry type cleaning solvent.
2. Inspect landing gear oleo assembly components for the following:
A. Bearings and bushings for excess wear, corrosion, scratches and overall damage.
B. Retaining pins for wear and damage.
C. Lock rings for cracks, burrs, etc.
D. Cylinder and orifice tube for corrosion, scratches, nicks and excess wear.
E. Orifice plate for hole restriction.
F. Fork tube for corrosion, scratches, nicks, dents and misalignment.
G. Air valve general condition.
3. Repair of the oleo is limited to smoothing out minor scratches, nicks and dents and replacement of parts.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2F24
3 2 - 11 - 0 2
Page 32-08
Revised: May 15, 1989