TM 1-1520-238-23
Change 6
1-125
1.40.
MAIN LANDING GEAR SHOCK STRUT SERVICE – NITROGEN – continued
e. Inflate shock strut (3). Torque nut (6) to
60 INCH-POUNDS.
(1) Inflate shock strut (3) to 812 10 PSIG. Use
nitrogen truck.
(2) Measure distance from center of valve (2) to
top of gland nut (8). Distance shall be 4.18
0.030 INCHES.
(3) Hold valve (2).
(4) Torque nut (6) to 60 INCH-POUNDS. Use
torque wrench.
f. Inspect (QA).
g. Disconnect nitrogen truck hose (4) from valve
(2).
(1) Remove nitrogen pressure.
(2) Hold valve (2).
(3) Remove nut (5) from valve (2). Remove hose
(4).
(4) Install cap (1) on valve (2).
(5) Lockwire valve (2) to shock strut (3) if re-
moved. Use wire (item 226, App F).
h. Repeat steps b. thru e. for opposite main land-
ing gear strut as required.
i. Check shock struts for leaks.
j. If required, lower helicopter and remove jacks
(para 1.66).
END OF TASK
M04-1613-11B
X
X
6
2
3
8
OPTIONAL METHOD ; WITH WHEEL
FREE OF GROUND AND STRUT
FULLY EXTENDED (X=4.18 ±0.030 INCHES)
INFLATE TO 812 ±10 PSIG
(WITH HELICOPTER JACKED AND WHEELS FREE OF GROUND)
SHOCK STRUT INFLATION INSTRUCTIONS
LOOSEN GAS CHARGING VALVE UPPER 3/4 INCH
HEX NUT UP TO A MAXIMUM OF 3/4 OF A TURN.
INFLATE WITH DRY NITROGEN UNTIL PRESSURE AND
DISTANCE MATCH ONE PAIR OF FIGURES:
ROTATED FOR
CLARITY
1
2
3
4
2
5
M04-1613-10
ROTATED FOR
CLARITY
