4.
Rotate the gland counterclockwise (with use of fitting) until the end of the gland lock ring shows in the slot in the cylinder body. Reverse rotation of the gland (clockwise direction) to allow the lock ring to move out of the slot. (Refer to Figure 29-8.) (It may be necessary to give the ring an assist to start out of the slot. If so, insert a strong wire pick or other available tool in the slot to lift up the end of the ring and then rotate gland.)
5.
Pull the piston and end gland from the cylinder.
6.
Remove O-rings as desired.
CLEANING, INSPECTION AND REPAIR OF MAIN GEAR ACTUATING CYLINDER.
1.
Clean the cylinder parts with a suitable dry type solvent and dry thoroughly.
2.
Inspect the cylinder assembly for the following:
A. Interior walls of cylinder and exterior surfaces of piston for scratches, burrs, corrosion, etc.
B. Threaded areas for damage.
C. End fitting retainer slot for excess wear.
D. Rod end fitting and swivel fitting of cylinder for wear and corrosion.
3. Repairs to the cylinder are limited to polishing out small scratches, burrs, etc., and replacing components. (Refer to Parts Catalog for replacement part numbers.)
ASSEMBLY OF MAIN GEAR ACTUATING CYLINDER. (Refer to Figure 32-14.)
1.
Install O-ring on the exterior of the end gland.
2.
Install O-ring and back-up ring in the interior of the end gland.
3.
Install O-ring on the body of the piston assembly.
4.
Lubricate the areas around the O-rings with hydraulic fluid, park-o-lube or vaseline; slide the end gland on the piston rod and the piston into the cylinder housing.
5.
Insert the hook end of a new lock ring (P/N 755 997) in the slot in the cylinder body and slot in the end gland. Rotate gland counterclockwise to completely wrap lock wing into assembly.
6.
Align port in end gland and cylinder body.
7.
Check smoothness of operation of piston and static pressure test unit to check for possible cut O-rings.
INSTALLATION OF MAIN GEAR ACTUATING CYLINDER.
1.
Attach the cylinder to its attachment fitting in the wheel well using bolt and nut.
2.
Attach the operating rod end and downlock spring swivel fitting to the upper side brace retraction fitting by using bolt, washer and nut. Ascertain swivel fitting is free to rotate.
3.
Connect the downlock spring to the swivel fitting.
4.
Check the adjustment of the cylinder rod end. (Refer to Adjustment of Main Landing Gear, Chapter 32.)
5.
Operate pump to purge system of air and check fluid level in reservoir.
6.
Turn master switch ON. Ensure the three green GEAR DOWN and LOCKED lights or ON. Turn switch off. Remove the airplane from jacks.
32-30-00
Page 32-64 Revised: December 6, 2002
2I16
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
NOSE GEAR ACTUATING CYLINDER.
REMOVAL OF NOSE GEAR ACTUATING CYLINDER.
1. Place the airplane on jacks. (Refer to Jacking, Chapter 7.)
— CAUTION —
WHEN MANUALLY RETRACTING THE NOSE GEAR ASSEMBLY, INSURE THE NOSE GEAR DOWNLOCK IS FULLY DISENGAGED BEFORE RELEASING THE NOSE GEAR DRAG LINKS. DAMAGE COULD OCCUR TO THE DOWNLOCK IF NOT FULLY DISENGAGED.
2.
Disconnect both nose gear door actuating rods.
3.
Disconnect the hydraulic lines from the actuating cylinder and cover the open line ends to prevent contamination.
4.
Disconnect the two gear tension springs from the spring arm that is attached to the right side of the strut housing.
5.
Disconnect the aft end of the cylinder from its attachment fitting.
6.
Disengage the nose gear downlock, (see CAUTION) retract nose gear slightly to remove gear from its downlocked position.
7.
Disconnect the gear downlock spring from upper drag link.
8.
Remove the cotter pin, nut and washers from the bolt that secures the lower drag link to the gear oleo housing.
9.
Slide out the bolt and the gear tension spring arm and lower the drag links.
10.
Pivot upper drag link and downlock until the hydraulic cylinder rod end connecting bolt is clear of the fuselage.
11.
Remove nut and washer and slide bolt holding rod end of hydraulic cylinder out of the downlock. Remove cylinder from wheel well.
DISASSEMBLY OF NOSE GEAR ACTUATING CYLINDER. (Refer to Figure 32-15.)
1.
With the cylinder removed from the airplane, mark the position of the end gland to facilitate installation.
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