(b)
For approximate flag marker locations, see Fig. 401.
S 434-037
(12) Put the wire bundle in its position to make sure the bundle flag marker is at the correct location.
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S 434-038
(13) Tighten a wire bundle clamp on each side of the marker.
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 could break the screw head free from the clip.
S 434-039
(14)
Do the last four steps again for the remaining wire bundle flag markers.
S 434-040
(15)
Move the loose parts of the wire bundle until they are equal along the wire bundle routing.
S 434-041
(16)
If the wire bundle is used for the inboard tank components, do these steps:
(a)
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 connection.
(b) Install and tighten the nuts on the fuel quantity tank units and fuel quantity compensators as follows (AMM 28-41-01/401): ~............................................. | HI-Z | 12-15 pound-inches | ............................................... | LO-Z | 25-35 pound-inches | ............................................... | SHIELD | 15-20 pound-inches | 2.............…...............................1
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747-400 MAINTENANCE MANUAL
(c) If the densitometer wire bundle was replaced, install and
tighten the nuts as follows (AMM 28-41-01/401): ~............................................................. | 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
(d) Install and tighten a wire bundle clamp on each of the tank
units and compensator or densitometer terminal blocks.
(e) Tighten all remaining wire bundle clamps in the inboard 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 could break the screw head free
from the clip.
(f) Install electrical seals in the inboard tank baffle
(AMM 51-31-01/201).
S 434-042
(17)
If the wire bundle is used for the outboard or reserve tank components, do these steps:
(a)
Tighten all remaining wire bundle clamps in the inboard 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 could break the screw head free from the clip.
(b) Install electrical seals in the inboard tank baffle (AMM 51-31-01/201).
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