TM 1-1520-238-23
3-138
3.39.
TAIL LANDING GEAR SHOCK STRUT PISTON REMOVAL/INSTALLATION (AVIM) – continued
3.39.7. Servicing
a. Hand stroke upper piston 2 INCHES minimum
from fully extended back to fully extended.
(1) Repeat stroke cycle six times, stopping with
piston fully compressed.
b. Install reducer (23) in fill port (14). Use
adjustable wrench.
c. Install hydraulic test stand hose (24) on fill
port (14).
d. Fill strut (7) with hydraulic fluid at 200 to 300
psi until piston (2) is fully extended. Use
hydraulic fluid (item 93, App F).
e. Remove hydraulic pressure.
f. Install valve (1) in piston (2). Torque valve (1) to
105 INCH-POUNDS.
(1) Lubricate new packing (5). Use hydraulic fluid
(item 93, App F).
(2) Install packing (5) on valve (1).
(3) Install valve (1) in piston (2).
(4) Torque valve (1) to 105 INCH-POUNDS. Use
socket and torque wrench.
(5) Install lockwire on valve (1). Use wire
(item 226, App F).
g. Inspect (QA).
h. Install nitrogen truck to valve (1).
(1) Charge strut (7) with nitrogen at 50 psi. Use
nitrogen truck.
i. Bleed fill port (14) to drive fluid out of strut (7).
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M04-2326-7
23
14
2
7
M04-2326-8
1
2
5
7
14
23
24
