S 394-090
(3)
Make sure the mating surfaces of the bulkhead and the connector are clean.
S 424-091
(4)
Put the wire bundle connector in the hole supplied in the bulkhead.
S 434-092
(5)
Hold the connector in its position while other persons out of the tank install the connector jamnut.
S 434-093
(6)
Tighten the connector jamnut to 200-250 pound-inches.
S 394-097
(7)
Apply the sealant around the edge of the connector flange in the tank.
S 434-098
(8)
Put the wire bundle in the center tank in its position from the connector to all of the FQIS components.
S 394-099
(9)
Make sure that before the wire bundle goes through electrical seal areas the remaining seal material is removed (AMM 51-31-01/201).
(10)
Loosely attach the wire bundle with clamps in its position.
S 434-100
NOTE: Do not tighten the clamps.
____
S 434-101
(11) Move the loose wire bundle to make sure it is equal along the wire bundle routing.
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A
747-400 MAINTENANCE MANUAL
S 434-102
(12) Connect the wire bundle terminals to the terminal block posts of the applicable tank units and compensator or densitometer.
NOTE: The wires have identification markers and the terminals have
____ different dimensions to prevent errors in installation.
S 434-103
(13)
Install and tighten the nuts on the fuel quantity tank units and fuel quantity compensator as follows (AMM 28-41-01/401, AMM 28-41-02/401): ~............................................... | HI-Z | 12-15 pound-inches | ................................................. | LO-Z | 25-35 pound-inches | ................................................. | SHIELD | 15-20 pound-inches | 2.....................….........................1
S 434-158
(14)
If the densitometer wire bundle was replaced, install and tighten the nuts as follows (AMM 28-41-11/401):
~............................................................. |TERMINAL | TORQUE | NUT SIZE | ............................................................... |SENSE | 6-8 pound-inches | 0.112-40 | ............................................................... |SENSE SHIELD | 12-15 pound-inches | 0.138-32 | ............................................................... |DRIVE -| 15-20 pound-inches | 0.164-32 | ............................................................... |DRIVE + | 25-30 pound-inches | 0.190-32 | ............................................................... |KR0 | 25-30 pound-inches | 0.190-32 | ............................................................... |KR1 | 15-20 pound-inches | 0.164-32 | ............................................................... |KR2 | 12-15 pound-inches | 0.138-32 | ............................................................... |KR3 | 6-8 pound-inches | 0.112-40 | 2................….........................…..................1
S 434-104
(15) Install and tighten a wire bundle clamp on each of the tank units and compensator or densitometer terminal blocks.
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28-41-09
ALL ú ú 01 Page 428 ú Oct 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 434-159
(16) Tighten all remaining wire bundle clamps in the center tank.
NOTE: Do not tighten the clamps installed on the plastic
____ stringer clips too much. These clips have screw heads encapsulated in the clip. If you tighten the wire bundle clamp too much it can break the screw head free from the clip.
S 394-105
(17)
Install electrical seals in the tank baffles (AMM 51-31-01/201).
S 944-106
(18)
Go out of the center tank.
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