Installation Platform - IRU Brackets
Figure 402/TASK 34-12-51-991-002
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(e)
Install the support shafts (8) on the pintles (1) of the nose gear.
(f)
Install the washers (3) and the nuts (4).
(g)
Install the new cotter pins (5).
(h)
Assemble the three parts of the tool (11) with the bolts (9). NOTE : The left and right parts of the tool are not
____ interchangeable. Make sure that they are installed on the correct side.
(i)
Install the tool (11) on the support shafts (8). To do this:
-tilt the top of the tool (11) forward to engage it on the support shafts (8).
-let the tool (11) turn down until it touches the surfaces of the ADIRU mount support.
(j)
Install the shim (13) between the tool (11) and the right support shaft (8) to prevent movement in the Y-axis (Roll) direction.
(k)
Install and tighten the knurled nuts (12) on each support shaft (8).
(2) Heading Check
(a) Manually push the four pins (10) into the inspection bushes of the tool (11). The pins (10) must go easily in the attachment holes of the ADIRU mount support.
NOTE : If it is not easy manually to push the four pins (10) into
____ the attachment holes for the ADIRU mount support, there is a heading angle mismatch. You must get more information from the Airbus Customer Service.
(3) Removal of the ALIGNMENT TOOL - MOUNT, ADIRU (98D34203000000)
(a)
Remove the four pins (10).
(b)
Remove the knurled nuts (12).
(c)
Remove the tool (11) and the shim (13) from the support shafts (8).
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(d)
Remove the bolts (9) and disassemble the three parts of the tool (11).
(e)
Remove and discard the cotter pins (5).
(f)
Remove the nuts (4) and the washers (3).
(g)
Remove the support shafts (8) from the pintles (1) of the nose gear.
(h)
Install the new packings (7) (7) and (2) and the flanges (6) on the pintles (1) of the nose gear.
(i)
Install the washers (3) and the nuts (4).
(j)
TORQUE the nuts (4) to between 1.2 and 1.35 m.daN (106.19 and
119.46 Ibf.in).
(k) Install the new cotter pins (5). Subtask 34-12-51-210-053
B. Flatness Check
(Ref. Fig. 403/TASK 34-12-51-991-003)
(1)
If necessary, replace the damaged peel shims (2) . Carefully clean the sealing bearing on the support surfaces of the ADIRU mount. Remove the unwanted thickness from the peel shims (2).
(2)
Put the INSTALLATION PLATFORM - IRU BRACKETS (98D34103000000) (1) in position on the three peel shims (2) with the right angle of the tool
(1) at position 2.
(3)
Put a CLINOMETER - REPLACED BY P/N 3028011001 (3028000) on the two perpendicular arms of the tool (1).
(4)
Adjust the assembly until it is horizontal. To do this, remove the unwanted thickness from the peel shims (2). Tolerance for X (pitch)= +/-5'30" (+/-0.09.). Tolerance for Y (roll)= +/-3'.30" (+/-0.06.).
(5)
Turn the tool (1) 180 degrees until its right angle is at position 4.
(6)
Adjust the assembly until it is horizontal. To do this, remove the unwanted thickness from the peel shims (2).
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Alignment Tool - ADIRU Mount
Figure 403/TASK 34-12-51-991-003
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(7)
Do a check to make sure that all the assembly is horizontal. If not, go back to step (2).
(8)
Remove the CLINOMETER - REPLACED BY P/N 3028011001 (3028000) and the tool (1).
Subtask 34-12-51-420-051
C. Installation of the ADIRU Mount
(Ref. Fig. 401/TASK 34-12-51-991-001)
(1)
Install the air conditioning pipe (9).
(2)
Install the nuts (10).
(3)
Remove the blanking caps from the electrical connectors.
(4)
Install the electrical connectors (12) on the mount (13).
(5)
Install the nuts (14).
(6)
Install the mount (13) on the peel shims (3). Be careful not to cause damage to the peel shims (3).
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