S 644-046-N00
(7)
Use engine oil to lubricate the threads of the bolts (6) which attach the thermocouple cable clamps to the bracket at the 1 o'clock position.
S 424-047-N00
(8)
At the 1 o'clock position, attach the thermocouple cable clamps to the bracket with the bolts (6) and the nuts (7).
(9)
Tighten the nuts (7) to 36-40 pound-inches (4.1-4.5 newton-meters).
S 434-048-N00
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77-21-02
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S 034-049-N00
(10)
Remove the screws (23) that temporarily attached the cover (24) on the terminal box.
S 014-050-N00
(11)
Remove the cover (24) from the terminal box.
S 034-051-N00
(12)
Remove the nuts (21 and 22) from the terminal box studs.
S 424-052-N00
(13)
Connect the harness leads of the left thermocouple cable (2), right thermocouple cable (1), and EEC thermocouple cable (20) to the applicable studs of the terminal box.
S 434-053-N00
(14)
Install the nuts (21 and 22) on the studs of the terminal box.
S 434-054-N00
CAUTION: DO NOT TIGHTEN THE NUTS MORE THAN THE MAXIMUM TORQUE THAT IS
_______ SPECIFIED. TOO MUCH TORQUE ON THE NUTS CAN LOOSEN OR CAUSE DAMAGE TO THE TERMINAL BOX STUDS.
(15) Tighten the nuts (21 and 22) to the correct torque as follows:
(a)
Tighten the nuts on the alumel (larger diameter) terminal box studs to 18-22 pound-inches (2.0-2.5 newton-meters).
(b)
Tighten the nuts on the chromel (smaller diameter) terminal box studs to 15-18 pound-inches (1.7-2.0 newton-meters).
S 034-055-N00
(16)
Remove the two screws (25) that temporarily attached the outer clamp half (26) to the inner clamp half (27) and the terminal box.
S 644-056-N00
(17)
Use engine oil to lubricate the threads of the screws (25) that attach the two halves of the clamp (26 and 27) together.
S 424-057-N00
(18)
Install the left (2) and right (1) thermocouple cables between the two clamp halves (26 and 27).
S 434-058-N00
(19)
With the thermocouple cables (1 and 2) between them, attach the two clamp halves (26 and 27) to the terminal box with the screws (25).
S 434-059-N00
(20)
Tighten the clamp screws (25) to 16-24 pound-inches (1.8-2.7 newton-meters).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 644-060-N00
(21)
Use engine oil to lubricate the threads of the screws (23) that hold the cover (24) on the terminal box.
S 214-061-N00
(22)
Examine the ground terminal on the inner surface of the cover (24) to make sure the ground lead from the EEC thermocouple cable (20) is correctly attached.
S 414-062-N00
(23)
Install the cover (24) on the terminal box with the screws (23).
S 434-063-N00
(24)
Tighten the screws (23) to 16-22 pound-inches (1.8-2.5 newton-meters).
S 434-064-N00
(25)
Install the lockwire on the screws (23).
S 644-065-N00
(26)
Use engine oil to lubricate the threads of the bolts (9) that attach the plate (11) and the thermocouple cable clamp to the bracket (15) at the 6 o'clock position.
S 424-066-N00
(27)
At the 6 o'clock position, put the right thermocouple cable (1) between the plate (11) and the bracket (13).
S 434-067-N00
(28)
With the right thermocouple cable (1) in the correct position, attach the plate (11) to the bracket (15) with the bolts (9) and the spacer (17).
NOTE: Make sure that the bolt (9) that does not have the
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本文链接地址：747-400 AMM 飞机维护手册 发动机指示 ENGINE INDICATING(39)
