747-400 AMM 飞机维护手册 发动机燃油和控制 1(25)

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 are on the top and to the left. 9) Do not tighten the thermocouple probe (67) at this time.
 NOTE: Do not install the clamp, ground strap, and bolt to
____ the bracket on the housing at this time.
 (e)  ENGINES POST-PW-SB 73-161; Install the differential pressure switch S1585 (50) for the fuel filter on the fuel pump (11): 1) Lubricate the two packings (49) with the petrolatum. 2) Lubricate the threads of the bolts (51) with engine oil. 3) Install the differential pressure switch (50) and the
 bracket (79) on the fuel pump (11) with the bolts (51), two washers (52), and packings (49).
 NOTE: Install two bolts (51) and two washers (52) at the
____ opposite location where you will install the bracket (79) and packings (49).
 4) Tighten the bolts (51) with your hand.
 (f)  ENGINES POST-PW-SB 73-161; Install the bracket assembly and thermocouple probe (71) for the EEC fuel temperature on the fuel pump (11): 1) Lubricate the packing (74) with the petrolatum. 2) Install the packing (74) to the bushing (76).
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3) Lubricate the threads of the bushing (76) with engine oil. 4) Install the bushing (76) in the fuel pump (11). a) Tighten the bushing (76) to 110-120 pound-inches
 (12.4-13.6 newton-meters). 5) Lubricate the threads of the bolt (77) with engine oil. 6) Install the bracket (75) to the plug (62) with the bolt
 (77).
 a) Tighten the bolt (77) to 85-95 pound-inches (9.6-10.7

 newton-meters). 7) Lubricate the threads of the screws (72) with engine oil. 8) Align the boltholes and the contour of the bracket (73)
 with the bracket (75). 9) Install the bracket (73) with the screws (72). a) Tighten the screws (72) to 36-40 pound-inches (4.0-4.5 newton-meters). 10) Carefully install the thermocouple probe (71) into the
 bracket assembly. 11) Lubricate the threads of the bolts (78) with engine oil. 12) Install the bolts (78) to connect the thermocouple probe
 (71).
 NOTE: The boltholes in the bracket assembly and the
____ thermocouple probe-flange are offset. If necessary, turn the thermocouple probe to align the boltholes.
 a)  Tighten the bolts (78) to 85-95 pound-inches (9.6-10.7 newton-meters).
 (g)  Install the union (30) in the fuel pump (11): 1) Install new packing (31) on the union (30). 2) Lubricate the threads of the union (30) with engine oil. 3) Install the union (30) in the drain port of the fuel pump
 (11).
 4) Tighten the union (30).
 5) Install the elbow on the union (30):

 a)  Lubricate the threads of the elbow (29) with engine oil.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
b) Install the elbow (29) on the union (30). c) Tighten the elbow (29) with your hand.
 S 644-082-N00
 (5)  
Lubricate the new packings (13, 35, 37, 41, and 42) with the petrolatum.

 S 424-116-N00

 (6)  
Install the packings (13, 35, 37, 41, and 42):

 (a)  
Install the packing (41) on the end of the oil-cooler-inlet fuel tube (34).

 (b)  
Install the packing (42) on the end of the oil-cooler-outlet fuel hose (36).

 (c)  
Install the packings (13) and retainers (12) on the ends of the supply tube (3) for the fuel distribution valve.

 (d)  
Install the packings (35 and 37) in the grooves on the drive shaft and the fuel pump base (11).

 S 424-117-N00
 (7)  
Install the fuel pump or fuel pump unit:

 (a)  
Make sure the bolts (60), with the washers, are installed in the drive pad of the fuel pump (11) (not the bolt which is to be installed at the anti-rotation hole location).

 (b)  
Lubricate the threads of the bolts (60) with the antigalling compound.

 (c)  
To install the fuel pump (11) or the fuel pump unit (11 and 6) easily, install the PWA 85989 handling fixture to the fuel pump (11): 1) Install the handling fixture to the fuel pump (11) or to
　
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