Piper Cherokee Six Service Manual page 237

PIPER CHEROKEE SIX SERVICE MANUAL
5A-20. INSTALLATION OF NOSE GEAR ACTUATING CYLINDER.
a.
Attach the cylinder to its attachment fitting using bolt and nut.
b.
Attach the operating rod end to the downlock, this will require manually
unlocking the nose gear to allow clearance from the engine mount to install attaching bolt.
(Refer to Caution Note Paragraph 5A-16).
c.
Connect the hydraulic lines to the cylinder fittings.
d.
Check the adjustment of the cylinder rod end. (Refer to Adjustment of Nose
Landing Gear, Section VIA.)
e.
Operate pump to purge system of air and check fluid level in reservoir.
f.
Remove the airplane from jacks.
5A-21. MAIN GEAR ACTUATING CYLINDER.
5A-22. REMOVAL OF MAIN GEAR ACTUATING CYLINDER.
a. Place the airplane on jacks. (Refer to Jacking, Section II.)
b. Disconnect the hydraulic lines from the actuating cylinder and cover the open line
ends to prevent contamination.
c. Disconnect the gear downlock spring from the swivel fitting at the upper end of the
spring.
d. 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.
e. Disconnect the cylinder from its attachment by removing nut and bolt.
f. Remove the cylinder from the wheel well.
5A-23. DISASSEMBLY OF MAIN GEAR ACTUATING CYLINDER. (Refer to Figure
5A-9.)
a. With the cylinder removed from the airplane, push the piston rod (6) (by hand)
toward the clevis (9) to remove oil from the unit.
b. Put clevis (9) only in a soft jaw vise and clamp against the clevis bearing (10).
c. If no pipe fitting is installed in the port of the end gland (1), install a fitting (1/8 -
27) into the port. This fitting need not be tight as it will be used for leverage only.
d. Rotate the gland counterclockwise (with use of fitting) until the end of the gland
lock ring (4) shows in the slot in the cylinder body (7). Reverse rotation of the gland
(clockwise direction) to allow the lock ring to move out of the slot. (Refer to Figure 5A-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.)
e. Pull the piston (6) and end gland from the cylinder.
f. Remove O-rings as desired.
HYDRAULIC SYSTEM
Issued: 7/28/75
1J21