Piper Arrow IV Turbo Maintenance Manual page 353

ASSEMBLY OF MAIN GEAR ACTUATING CYLINDER. (Refer to Figure 29-11.)
1. Install O-ring on the exterior of the end gland.
2. Install O-ring or T-seal, 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 ring 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. Remove the airplane from jacks.
HYDRAULIC LINES.
REMOVAL AND INSTALLATION OF HYDRAULIC LINES.
Remove a damaged hydraulic line by disconnecting the fitting at each end and by disconnecting where
secured by brackets. Refer to Figures 29-3 and 29-4 as an aid in the location of attaching brackets and bends in
the lines. Provide a small container for draining the line. Install a new or repaired line in reverse. Operate the
pump to purge the system of air and check fluid level in reservoir.
TESTING HYDRAULIC SYSTEM.
The hydraulic system should be tested to determine that it functions properly after performing any service
or repairs. It is suggested that the airplane be connected to an outside source in order to conserve the battery.
(Refer to External Power Receptacle, Chapter 24.)
Turn master switch OFF before inserting or removing external
power supply plug.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—CAUTION—
2D2
29-10-27
Page 29-32
Revised: August 8, 1984