(Ref. Fig. 401/TASK 32-21-13-991-004)
**ON A/C 005-049, 055-099, 101-105, 151-199, 201-225,
(Ref. Fig. 401A/TASK 32-21-13-991-004-A) R **ON A/C 106-149, 226-299, 301-399, 401-499,
(Ref. Fig. 401B/TASK 32-21-13-991-004-B)
**ON A/C 001-004, 051-054,
(Ref. Fig. 402/TASK 32-21-13-991-001) R **ON A/C 005-049, 055-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 402A/TASK 32-21-13-991-001-A)
1EFF : ALL 1 32-21-13Page 421 1 1 Aug 01/05 1 1 1CES 1
**ON A/C 001-004, 051-054,
(Ref. Fig. 403/TASK 32-21-13-991-005) R **ON A/C 005-049, 055-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 403A/TASK 32-21-13-991-005-A)
**ON A/C 001-004, 051-054,
Subtask 32-21-13-110-051
A. Preparation for Installation
(1)
Clean all the removed parts with CLEANING AGENTS (Material No. 11-001) and dry them with compressed air.
(2)
Make sure that the parts and the chromed surfaces are in the correct condition.
(3)
Make sure that the three friction pads (12) are in position in the upper part of the shock strut.
(4)
Make sure that the scraper (15) is in the correct condition. Replace the scraper (15) if necessary.
(5)
To prevent damage to the scraper (15) during installation, install it on the shock absorber (11). You will push the scraper (15) in its housing when you engage the shock absorber in the upper bearing.
(6)
Systematically replace the seal (14) and the ring (13).
(7)
Apply a thin layer of COMMON GREASE (Material No. 04-022) to the pin
(61) and to the bores of the torque link arms.
(8)
Clean the attachment hardware with CLEANING AGENTS (Material No. 11-004A) and dry them with filtered compressed air.
(9)
Apply a light coat of SPECIAL MATERIALS (Material No. 05-047) to the threads of all the nuts, screws, bolts and pins.
(10) Apply a light layer of SPECIAL MATERIALS (Material No. 05-047) to the threaded parts and the stop plates (4) and (5).
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(11) Apply a light layer of SPECIAL MATERIALS (Material No. 05-047) to the
lugs of the shock absorber upper part. Subtask 32-21-13-420-052
B. Installation of the Shock Absorber Assy CAUTION : WHEN YOU INSTALL THE SHOCK ABSORBER, MAKE SURE THAT YOU ALIGN
_______ THE PISTON LUGS WITH THE SLOTS IN THE SHOCK STRUT BACKPLATE. THE SHOCK ABSORBER WILL THUS BE IN THE CORRECT POSITION (THE WHEEL AXLE PERPENDICULAR TO THE AIRCRAFT CENTERLINE). AN INCORRECT INSTALLATION CAN CAUSE IMPORTANT DAMAGE TO THE NLG.
(1)
Install the shock absorber on the lifting trolley.
(2)
Install the GUIDE CONE (J47999) on the threaded part of the sliding tube.
(3)
Release the nitrogen pressure and fully compress the shock absorber.
(4)
Make sure that the bush (10) is in position on the shock absorber (11).
(5)
Slowly engage the shock absorber in the shock strut. Be careful not to cause damage to the friction pads (12) when the shock absorber goes near the upper self-aligning bearing.
(6)
Push the scraper (15) in its housing.
(7)
Lift the shock absorber (11) so as to align the lugs of the piston with the slots in the shock-strut backplate (9).
(8)
Remove the GUIDE CONE (J47999) from the threaded part of the sliding tube.
NOTE : When the shock absorber (11) is fully engaged in the top of
____ the shock strut (8), the length of the thread (16) that you can see is between 17 and 18 mm (0.67 and 0.71 in.).
(9) Install and tighten the nut (7) with the WRENCH (J47564) to between 22 and 25 m.daN (162.24 and 184.36 lbf.ft).
(10) Install the charging valve:
(a)
Install the stop plate (5).
(b)
Install the valve (1) with a new packing (6).
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