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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 224-040-N00
(2)
If you do not know if the classified spacer plate at the trailing edge of the buffer air cooler is the correct spacer, do the steps that follow:
(a)
Install the buffer air cooler and the classified spacer plate on the intermediate case. 1) Use the work screws.
(b)
Measure the distance between the trailing edge of the buffer air cooler and the intermediate case (Fig. 401).
(c)
If the classified spacer plate does not have the correct fit, use another classified spacer plate from the table below. ~................................................. | Table 401 | ................................................... | Class | Spacer Thickness - Inch (mm) | ................................................... | 1 | 0.022-0.028 (0.559-0.711) | ................................................... | 2 | 0.036-0.044 (0.914-1.118) | ................................................... | 3 | 0.058-0.068 (1.473-1.727) | ................................................... | 4 | 0.075-0.085 (1.905-2.159) | ................................................... | 5 | 0.095-0.105 (2.413-2.667) | ................................................... | 6 | 0.120-0.130 (3.048-3.302) | 2.........….......................................1
(d)
Remove the buffer air cooler and the classified spacer plate.
S 424-048-N00
(3)
Attach the two supports with the steps that follow:
(a)
Lubricate the threads of the bolts, which attach the supports, with engine oil.
(b)
Attach the supports to the axial edges of the buffer air cooler with the bolts and nuts.
F.
Procedure
S 424-041-N00
(1)
Install the buffer air cooler.
(a)
Lubricate the threads of a jamnut with engine oil.
(b)
Assemble the strut and one rod end bearing and jamnut.
NOTE: Make sure the dimension between the jamnut and the rod
____ end bearing is 1.00 inch (25.4 mm) (View A-A).
1) Tighten the jamnut with your hand.
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75-22-01
ALL ú ú N02 Page 408 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(c)
Install the rod end bearing in the mount bracket at the 2 o'clock position on the intermediate case. 1) Lubricate the threads of the bolt, which attaches the inner
rod end bearing, with engine oil. 2) Attach the inner rod end bearing to the intermediate case with the bolt and nut. 3) Tighten the nut to 85-95 pound-inches (9.6-10.7 newton-meters).
(d)
Remove the protection caps from the ends of the cooling tubes.
(e)
Lubricate the threads of the two bolts, which attach the mount bracket to the bracket, with engine oil.
(f)
Install the mount bracket of the outer rod end bearing to the bracket at the front of the buffer air cooler with the bolts. 1) Tighten the bolts with your hand.
(g)
Lubricate the threads of the jamnut, which attaches the remaining rod-end bearing to the strut, with engine oil.
(h)
Assemble the remaining rod-end bearing and jamnut to the strut. 1) Tighten the jamnut with your hand.
(i)
Lubricate the threads of the bolt, which attaches the mount bracket to the outer rod-end bearing, with engine oil.
(j)
Attach the outer rod-end bearing to the mount bracket with the bolt. 1) Tighten the bolt with your hand.
(k)
Examine the inspection holes on the strut for blockage after your last adjustment of the strut length.
NOTE: Blockage of the inspection holes shows that the threads
____
are correctly engaged.
(l)
Tighten the jamnuts to 75-85 pound-inches (8.5-9.6 newton-meters). 1) Safety the jamnuts with lockwire.
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