TM 1-1520-238-23
1-124
Change 6
1.40.
MAIN LANDING GEAR SHOCK STRUT SERVICE – NITROGEN – continued
b. Connect nitrogen truck hose (4) to valve (2).
Torque nut (5) to 60 INCH-POUNDS.
(1) Hold valve (2).
(2) Install nut (5) on valve (2).
(3) Torque nut (5) to 60 INCH-POUNDS. Use
torque wrench.
c. Open valve (2) on shock strut (3).
(1) Hold valve (2).
(2) Loosen nut (6) until resistance is felt; then
loosen 1/2 to 3/4 turn to offseat valve.
NOTE
Go to step d. to service shock strut
with jacks in place and weight on
wheels.
Go to step e. to service shock strut
with helicopter jacked (para 1.66) and
wheels free of ground.
d. Inflate shock strut (3). Torque nut (6) to 60
INCH-POUNDS.
(1) Inflate shock strut (3) until pressure and dis-
tance match one pair of figures on chart (7).
Use nitrogen truck.
(2) Measure distance from center of valve (2) to
top of gland nut (8).
(3) Hold valve (2).
(4) Torque nut (6) to 60 INCH-POUNDS. Use
torque wrench.
(5) Go to step f.
GO TO NEXT PAGE
4
2
5
6
3
5
2
M04-1613-8
ROTATED FOR
CLARITY
6
7
3
2
X
8
M04-1613-9C
(WITH JACKS IN PLACE AND WEIGHT ON WHEELS)
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:
1.60
1800
1.50
2.00
1.40
PRESSURE ±10 PSIG
1900
1.70
2230
1.20
2700
1.80
2000
2530
1.90
1.30
2375
DISTANCE X
±030
1725
20110
ROTATED
FOR
CLARITY
