Main Gear Oleo Assembly - Piper PA-44-180 SEMINOLE Maintenance Manual

ASSEMBLY OF MAIN GEAR OLEO. (Refer to Figure 32-1.)
1. Determine that all parts are cleaned and inspected.
2. To install the piston tube plug, first lubricate the plug O-ring with hydraulic fluid (MIL-H-5606) and install
it on the plug. Lubricate the inside wall of the tube. Insert the plug into the top of the tube and push it to
the fork end. Align the bolt holes of the fork, tube and plug, and install bolt assembly.
3. If desired, cement a cork in the hole in the bottom of the fork body to prevent dirt from entering between the
fork and tube.
4. To assemble components of orifice tube, insert orifice plate into the bottom of the tube and secure with snap
ring.
5. To install tube in oleo housing, insert the tube up through the housing. With the end of the tube exposed
through the top of the housing, install the O-ring, retainer, washer, and locknut. Tighten locknut only finger
tight at this time.
6. Assemble components of piston tube on the tube by placing in order, snap ring, washer, lower bearing with
outer and inner O-ring and upper bearing. Align the two .125 diameter holes and the lock pin holes with the
corresponding holes in the piston tube and install pins.
7. Lubricate the wall of the cylinder oleo housing and tube, and carefully insert the tube assembly into the
housing, guiding the orifice tube into the piston tube. Install the wiper strip, slide the washer into position
and secure the assembly with snap ring.
8. Tighten locknut at top of housing.
9. Ascertain that the bushings are installed in the upper and lower torque links and then install links. the torque
link bolt assemblies should be lubricated and installed with the flat of the bolt head hex adjacent to the
mined stop of the wide end of the link. (Use the same thickness of spacer washers between the two links as
those removed to maintain correct wheel alignment.) Tighten the bolts only tight enough to allow no side
play in the links, yet be free enough to rotate.
Instructions contained in Step 10 pertain to left oleo strut assemblies only.
10. Assemble squat switch actuator bracket on bolt assembly. Insert a rivet through the hole provided in the
bracket into the upper link and install the nut. Install squat switch bracket immediately above the actuator
bracket.
11. Attach spring attachment plate to the mounting lug on the base of the housing immediately above the upper
link.
12. Connect brake line and bleed the brakes.
13. Lubricate gear assembly. (Refer to Chapter 12.)
14. Compress and extend the strut several times to ascertain the strut will operate freely. The weight of the gear
wheel and fork should allow the strut to extend.
15. Service oleo strut with fluid and air. (Refer to Chapter 12.)
16. Check main gear alignment and gear operation. Ascertain that gear is down and locked.
17. Remove the airplane from jacks.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— Note —
2G2
3 2 - 11 - 0 3
Page 32-10
Revised: May 15, 1989