(b)
Install the valve (1) with a new packing (5).
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(c)
TORQUE the valve (1) to between 1 and 1.25 m.daN (88.49 and
110.61 lbf.in) and safety with MISCELLANEOUS (Material No. 19-010).
(d)
Install the washer (3) and the screw (2).
(e)
TORQUE the screw (2) to between 0.25 and 0.35 m.daN (22.12 and
30.97 lbf.in) .
(11)
Remove the lifting trolley.
(12)
Do the replenishment of the NLG shock absorber (Ref. TASK 12-12-32-611-005).
(13)
Pressurize the shock absorber with nitrogen to slowly extend the shock absorber and to make sure that the cams are engaged (Ref. TASK 12-14-32-614-004).
(14)
With the shock absorber fully extended, make sure that the wheel axle is perpendicular to the aircraft centerline.
NOTE : In the fully extended position of the shock absorber, the NLG
____ is automatically centered (the nose wheel steering is in zero position).
(a) Make sure that the dimension H of the extended part of the NLG sliding tube between the lower area of the NLG lower bearing and the upper surface of the towing fitting lug is between 454.6 mm (17.8976 in.) and 445.6 mm (17.5433 in.). (Ref. Fig. 404/TASK 32-21-13-991-009)
(15)
Try to turn the NLG shock absorber around its vertical axis to make sure that the anti-rotation lugs are engaged in the slots of the back plate:
(a)
the shock absorber must not turn.
(b)
If you can turn the shock absorber, this shows that the anti-rotation lugs are not engaged in the slots because the centering cams are not correctly installed.You must remove the shock absorber to install the cams in the correct position.
(16)
Install the stop (62), the bolts (64), the washers (61) and (63) and the nuts (60). Tighten the nuts (60).
NOTE : Make sure that there are no hard points when you move the
____
torque links through their full travel.
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(17)
Apply a layer of COMMON GREASE (Material No. 04-022) to the washers (56), (57) and (58) and to the pin (59).
(18)
Align the bores of the torque links and install the washers (56),
(58) and the washer (57).
(19)
Install the pin (59).
(20)
Make sure that the play at the torque link hinges is correct (Ref. TASK 32-21-00-200-003).
(21)
Do the torque procedure on the nut (53)
(a)
Apply a layer of SPECIAL MATERIALS (Material No. 05-047) to the washer (55) and install it on the pin (59).
(b)
Apply a layer of SPECIAL MATERIALS (Material No. 05-047) to the threads of the nut (53) and install it.
(c)
TORQUE the nut (53) to 9 m.daN (66.37 lbf.ft) and loosen the nut (53). Do this three times.
(d)
Loosen the nut (53) to get a clearance between 0 mm (0.0000 in.) and 0.1 mm (0.0039 in.).
(e)
Make sure that you can align a hole of the nut (53) with the slot of the pin (59) and keep the clearance given above. If not:
-loosen the nut (53),
-remove the washer (55),
-adjust the thickness of the washer (55) to get the clearance given above with a hole of the nut (53) aligned with the slot of the pin (59).
NOTE : The total thickness of the washer (55) (shoulder included)
____ must not be less than 4 mm (0.1574 in.). If the thickness of the washer (55) is less than 4 mm (0.1574 in.), replace it with a new washer (55).
-
do a passivating treatment on the reworked surface (Ref. CMM 320901),
-
do the torque procedure on the nut (53) again.
(f) Apply a layer of SPECIAL MATERIALS (Material No. 05-047) to the threads of the screw (54).
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(g)
Install the screw (54), the washer (67), the nut (66) and tighten it.
(h)
Install the new cotter pin (65) to the nut (66).
(22)
Apply a layer of SEALANTS (Material No. 09-001) to the areas identified E.
(23)
Make sure that the lubrication points are clean and in good condition on the pin (59).
Subtask 32-21-13-420-051-A
C. End of the Installation
(1)
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