2.
Remove safety wire and unscrew the end gland.
3.
Complete disassembly of piston and O-rings.
32-30-00 Page 32-65 Revised: December 6, 2002
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
32-30-00 Page 32-66 Revised: December 6, 2002
2I18
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
CLEANING, INSPECTION AND REPAIR OF NOSE GEAR ACTUATING CYLINDER.
(Refer to Figure 32-15.)
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 the cylinder and exterior surfaces of the piston for scratches, burrs, corrosion, etc.
B. Threaded areas for damage.
C. 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 parts. ASSEMBLY OF NOSE GEAR ACTUATING CYLINDER. (Refer to Figure 32-15.)
1.
Install O-ring on the exterior of the end gland.
2.
Install O-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, slide the end gland on the piston rod and screw the end gland into the cylinder housing.
5.
Align reference marks and secure the end gland with safety wire.
6.
Check smoothness of operation of the piston.
INSTALLATION OF NOSE GEAR ACTUATING CYLINDER.
1.
Attach the cylinder rod end to the downlock using an appropriate bolt, washer and nut making sure the nut is on the inboard side.
2.
Pivot upper drag link and downlock to normal position.
3.
Insert bolt through gear tension spring arm and insert through right hand side of oleo housing and lower drag link pivot point. Secure and safety. A washer (AN96-516L) is installed on the bolt between the lower drag link and the arm.
4.
Reconnect the gear downlock spring to upper drag link.
5.
Attach the aft end of the hydraulic cylinder to its attachment fitting using bolt, nut and washer.
6.
Reconnect the two gear tension springs to the spring arm.
7.
Reconnect both nose gear door actuating rods.
8.
Connect the hydraulic lines to the cylinder fittings. The forward fitting (gear up) is a restricted port fitting.
9.
Check adjustment of the cylinder rod end. Refer to Adjustment of Nose Landing Gear, 32-20-00.
32-30-00 Page 32-67 Revised: December 6, 2002
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
— 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.
10.
Operate pump to purge system of air and check fluid level in reservoir.
11.
Turn master switch ON. Ensure the three green GEAR DOWN and LOCKED lights or ON. Turn switch off. Remove the airplane from jacks.
LANDING GEAR FREE-FALL VALVE ASSEMBLY INSPECTION AND REPAIR OF FREE-FALL VALVE
This valve is located on the right side of the forward bulkhead at station 40.75. Inspection is limited to determining if any signs of hydraulic fluid leakage are evident around the seam between the end fitting and valve body, and around the periphery of the piston assembly shaft. If leaks appear, the valve assembly should be replaced since it is impractical to repair the valve.
REMOVAL OF FREE-FALL VALVE ASSEMBLY
1.
Loosen cable set screw securing cable to free-fall valve. Remove cable from valve.
2.
Disconnect hydraulic lines connected to the valve. Place a rag in position to absorb any hydraulic fluid spillage that may result. Cap the lines to avoid contamination.
3.
Remove the 2 MS35207-264 screws, MS20365-1032C nuts, AN960-10L washers, 80700-6 spacers, and PS10017-2-10 clamps securing the valve to the frame.
4.
Remove the assembly from the airplane.
INSTALLATION OF FREE-FALL VALVE ASSEMBLY.
1.
Position valve assembly in proper location in airplane.
2.
Secure valve assembly to frame with 2 each PS10017-2-10 clamps, 2 each 80700-6 spacers, 2 each MS35207-264 screws, AN960-10L washers, and 2 each MS20365-1032C nuts.
3- Apply Titeseal No. 3 in back of the male threads of elbows fittings. Insert fittings into valve an tighten. Titeseal should be applied sparingly to prevent it entering the hydraulic system.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：西门诺尔飞机维护手册 simenole PA-44-180 AMM 2(15)
