747-400 AMM 飞机维护手册 发动机 ENGINE 2(156)

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 CAUTION:_______MAKE SURE YOU TIGHTEN THE NUTS TO THE CORRECT TORQUE. AN INCORRECTLY INSTALLED COVER CAN CAUSE DAMAGE TO THE PACKING AND AN IN-FLIGHT SHUTDOWN.
 (h) Install the nuts (81 or 72) and washers (61) to attach the cover (76). 1) Lubricate the threads with engine oil. 2) If self-locking nuts (81) are used, tighten the nuts to 150-170 pound-inches (16.9-19.2 newton-meters).
 3)  If hex nuts (72) with lockwire provisions are used, tighten the nuts to 125-150 pound-inches (14.1-16.9 newton-meters) and install lockwire or safety cable and safety cable ferrule.
 (i)  
Lubricate the packing (68) and the threads of the insert (67) with engine oil.

 (j)  
Install the insert (67) and the packing (68) in the cover (29).

 1)  Tighten the insert to 200-225 pound-inches (22.6-25.4
 newton-meters).

 (k)  
Lubricate the packing (58) and the threads of the plug (59) with engine oil.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(l)  Install the plug (59) and the packing (58) in the cover (29).
 1)  While you hold the insert with a wrench on the flats, tighten the plug (59) to 110-120 pound-inches (12.4-13.6 newton-meters).
 2)  Install lockwire or safety cable and safety cable ferrule on the plug (59).
 (m)  
Lubricate the packings (50 and 52) with engine oil.

 (n)  
Lubricate the packings (52) and the insert threads (51) with
 engine oil.

 (o)  
Install the packings (52) on the inserts (51).

 (p)  
Install the inserts (51) to the LP4 and LP5 ports.

 1)  Tighten the inserts (51) to 200-225 pound-inches (22.6-25.4 newton-meters).

 (q)  
Lubricate the packings (50) and the reducer threads (49) with engine oil.

 (r)  
Install the packings (50) on the reducers (49).

 (s)  
Install the reducers (49) in the inserts on the LP4 and LP5
 ports.
 1) Tighten the reducers (49) to 110-120 pound-inches

 (12.4-13.6 newton-meters).

 (t)  
Install the pressure relief valve (66) of the oil filter to the main oil filter housing (1), as follows: 1) Install the packings (64 and 65), lubricated with engine

 oil, in the groove in the pressure relief valve (66) of the oil filter. 2) Install the pressure relief valve (66) of the oil filter to the main oil filter housing (1). 3) Tighten the the pressure relief valve (66) of the oil filter to 525-625 pound-inches (59.3-70.6 newton-meters). 4) Install lockwire or safety cable and safety cable ferrule on the pressure relief valve (66) of the oil filter.

 (u)  
Install the pressure relief valve (21) of the oil system to the port on the main oil filter housing:

 NOTE: This port is below the pressure relief valve of the oil
____
 filter (66).

 1)  Install the packings (62 and 63), lubricated with engine oil, in the groove in the pressure relief valve (21) of the oil system.
 2)  Align the boltholes of the pressure relief valve (21) of the oil system and of the bracket (30) with those of the main oil filter housing (1). a) Install the bolts (60). b) Tighten the bolts (60) to 125-140 pound-inches
 (14.1-15.8 newton-meters). c) Install lockwire or safety cable and safety cable ferrule.
 S 034-043-N00
 (4)  ENGINES POST-PW-SB 72-525;
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
If you will install a new main oil filter housing (1), do the steps that follow (Fig. 402, View O):
 (a)  
Install the pressure relief valve (79) in the center of the cover (29). 1) Attach the pressure relief valve with the retaining ring

 (78).

 (b)  
Install the packing (57), lubricated with engine oil, in the groove in the cover (29).
　
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