3) Install the transfer tubes (54, and 55A) in the transfer
tube ports in the main gearbox.
(c) ENGINES POST-PW-SB 79-43; Do the steps that follow to install the anti-siphon tube assembly (55C): 1) Do the steps that follow to find the correct position for
the anti-siphon tube assembly (55C).
a) Before you install the packings, put the eccentric flange of the tube assembly (55C) in the mating counterbore of the main oil filter housing (1).
b) Make sure that the anti-siphon tube assembly (55C) can turn only a small amount.
NOTE: The anti-siphon tube assembly (55C) will not
____ turn much if the fit of the main oil filter housing and the anti-siphon tube is correct.
c) Compare the position of the anti-siphon tube assembly (55C) with the main oil filter housing (1) held in the installed position.
d) Remove the anti-siphon tube assembly (55C). 2) Apply engine oil to the two packings (82) 3) Install the packings (82) on the anti-siphon tube assembly
(55C). 4) Install the anti-siphon tube assembly (55C) in the hole in the front of the gearbox.
(d) ENGINES POST-PW-SB 79-43; With the anti-siphon tube assembly (55C) turned in the correct position, install the main oil filter housing (1) on the transfer tubes (54 and 55A) and the anti-siphon tube assembly.
NOTE: The anti-siphon tube assembly must fit correctly in the
____
mating hole of the main oil filter housing (1).
(e) Install the bolts (60) and washers (61) that attach the main oil filter housing (1) to the forward face of the main gearbox. 1) Do a check of the position of the anti-siphon tub assembly.
NOTE: The end of the tube assembly must be approximately
____ 0.25 inch (6.350 mm) from the top of the gearbox housing.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-61-11
ALL ú ú N02 Page 438 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
2) Tighten the bolts (60) to 125-140 pound-inches
(14.1-15.8 newton-meters).
S 434-016-N00
(6)
Connect the tube (36) for the oil trim pressure as follows:
(a)
Install the packing (42), lubricated with engine oil, in the
groove on the tube (36) for the oil trim pressure.
(b)
Install the tube (36) for the oil trim pressure to the top
inboard port on the main oil filter housing (1).
(c)
Install the bolts (43), threads lubricated with engine oil, that attach the tube (36) for the oil trim pressure to the main oil filter housing (1).
(d)
Tighten the bolts (43) to 85-95 pound-inches
(9.6-10.7 newton-meters).
S 434-017-N00
(7)
Install the drain tube (37) (bypass valve drain tube for the fuel/oil cooler) as follows:
(a)
Install the packing (40), lubricated with engine oil, on the
flange end of the drain tube (37).
(b)
Install the packing (39), lubricated with engine oil, on the
other end of the drain tube (37) with the retainer (38).
(c)
Put the drain tube (37) in the bottom inboard port on the main oil filter housing (1) and on the bypass valve adapter for the fuel/oil cooler. 1) Install the bolts (41), threads lubricated with engine oil,
to the flange end of the drain tube (37). a) Tighten the bolts (41) to 36-40 pound-inches (4.1-4.5 newton-meters). 2) Connect the tube nut to the bypass valve port of the fuel/oil cooler. 3) Tighten the tube nut to 65-70 pound-inches (7.3-7.9 newton-meters). 4) Loosen and tighten, again, the tube nut to 65-70 pound-inches (7.3-7.0 newton-meters). 5) Install lockwire on the tube nut.
S 414-018-N00
(8)
Install the oil filter inlet and outlet pressure tubes (20 and 31) as follows:
(a)
Connect the inlet pressure tube nut (31) to the reducer (LP4
port) on the top forward and inboard face of the main oil
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 發動機 ENGINE 2(158)
