(e)
Connect the bleed hose (14) between the 3-way valve (12) and the drain container (15).
(f)
Fill the hydraulic source with HYDRAULIC FLUIDS (Material No. 02-001) or HYDRAULIC FLUIDS (Material No. 02-004).
(2)
Open the control valves (13) and (20) and operate the hand pump (17) to bleed the filling system. Close the valves (20) and (13).
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R NLG Shock Absorber Replenishment - Location and Detail Figure 301/TASK 12-12-32-991-001
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R NLG Shock Absorber - Filling System Figure 302/TASK 12-12-32-991-012
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(3)
Install the FILLING ASSEMBLY (M21930) on the charging valve (6) as follows:
(4)
Remove the blanking cap (7) from the charging valve (6).
(a)
Remove the cap (1) and the plug (5) from the FILLING ASSEMBLY.
(b)
Move the wrench (9) up to the knurled shoulder (3) and install the FILLING ASSEMBLY on the charging valve (6).
(c)
Turn the core (8) of the FILLING ASSEMBLY clockwise with the knurled shoulder (3) to install the seal (4) on the charging valve (6).
(5)
Connect the filling hose (11) to the end fitting (2) of the FILLING ASSEMBLY and hand tighten.
(6)
Deflate the shock absorber as follows: WARNING : MAKE SURE THAT THE AREA AROUND THE AIRCRAFT IS CLEAR OF
_______ PERSONS AND EQUIPMENT. WHEN YOU PRESSURIZE/DEPRESSURIZE THE SHOCK ABSORBER, WITH THE AIRCRAFT WEIGHT ON THE GROUND, THE AIRCRAFT WILL MOVE.
WARNING : DO NOT LET HIGH PRESSURE GAS TOUCH YOUR SKIN. GAS BUBBLES
_______
IN YOUR BLOOD CAN KILL YOU.
(a) Move the wrench (9) down and slowly turn counterclockwise to open the charging valve (6) and release the nitrogen pressure.
NOTE : In the step that follows, make sure that you deflate the
____ shock absorber slowly. This is to prevent possible shock when the shock absorber gets to the lower limit of its travel.
(b)
Slowly open the control valve (13) to let the shock absorber fully deflate.
(c)
When all the nitrogen pressure is released, turn the wrench (9) clockwise to close the charging valve (6).
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Subtask 12-12-32-611-053
B. Replenishment of the NLG Shock Absorber WARNING : MAKE SURE THAT THE AREA AROUND THE AIRCRAFT IS CLEAR OF PERSONS
_______ AND EQUIPMENT. WHEN YOU PRESSURIZE/DEPRESSURIZE THE SHOCK ABSORBER, WITH THE AIRCRAFT WEIGHT ON THE GROUND, THE AIRCRAFT WILL MOVE.
(1) Fill the NLG shock absorber with HYDRAULIC FLUIDS (Material No. 02-001) or HYDRAULIC FLUIDS (Material No. 02-004), as follows:
CAUTION : DO NOT LET THE HYDRAULIC PRESSURE INCREASE TO MORE THAN
_______ 22bar (319psi). THIS WILL PREVENT INTERNAL DAMAGE.
NOTE : 5.577 l (1.4732 USgal) of hydraulic fluid is necessary to fill
____
the NLG shock absorber.
NOTE : In the steps that follow, make sure that you compress the
____ shock absorber slowly. This is to prevent possible shock when the shock absorber gets to the limit of its travel.
(a)
Open the control valve (20) and slowly open the charging valve (6).
(b)
Slowly operate the hand pump (17) to pressurize the shock absorber until the dimension H is 50 mm (1.9685 in.).
(c)
Close the control valve (20).
(d)
Wait for a minimum of ten minutes to make sure all the air is removed from the hydraulic fluid.
(e)
Slowly open the control valve (13) and let the shock absorber compress fully.
(f)
Do the steps (a) thru (e) again, until all the air is removed from the hydraulic fluid in the drain container (15).
(g)
Keep the shock absorber compressed fully, and close the control valve (13) and the charging valve (6).
(h)
Disconnect the hydraulic supply hose (18) from the 3-way valve (12).
(i)
Open the control valve (13).
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(j)
Loosen the filling hose (11) at the FILLING ASSEMBLY to let the hydraulic fluid drain into the drain container (15).
(k)
Tighten the filling hose (11) on the FILLING ASSEMBLY and close the control valve (13).
(l)
Remove the bleed hose (14) from the three-way valve (12).
(2) Fill the NLG shock absorber with nitrogen gas, as follows: WARNING : DO NOT PUT COMPRESSED GAS IN CONTACT WITH YOUR SKIN. THE
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