Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 351 / 881

ASSEMBLY OF NOSE GEAR ACTUATING CYLINDER. (Refer to Figure 29-6.)
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 the adjustment of the cylinder rod end. Refer to Adjustment of Nose Landing Gear (Chapter 32).
— 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.
MAIN GEAR ACTUATING CYLINDER.
REMOVAL OF MAIN GEAR ACTUATING CYLINDER.
1. Place the airplane on jacks. (Refer to Jacking, Chapter 7.)
2 . Disconnect the hydraulic lines from the actuating cylinder and cover the open line ends to prevent
c o ntamination.
3. Disconnect the gear downlock spring from the swivel fitting at the upper end of the spring.
4. Remove the downlock spring swivel fitting and disconnect the cylinder operating rod end from the
upper side brace retraction fitting by removing the attaching nut, washer and bolt.
5. Disconnect the cylinder from its attachment by removing nut and bolt.
6. Remove the cylinder from the wheel well.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
29-13-01
Page 29-24
Revised: June 20, 1995
2C19