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(b) Loosely install the clamp, ground strap, and nut to the bracket on the housing.
CAUTION: MAKE SURE THE THERMOCOUPLE STUD BOX DOES NOT TURN WHEN THE
_______ COUPLING NUT IS TIGHTENED. IF THE THERMOCOUPLE STUD BOX TURNS, DAMAGE TO THE WIRING HARNESS CAN OCCUR.
(c)
If it is necessary to align the thermocouple stud box, loosen the coupling nut.
(d)
Align the thermocouple stud box with the wiring harness
connector.
(e)
Hold the thermocouple stud box and tighten the coupling nut for the thermocouple probe to 95-100 pound-inches (10.734-11.298 newton-meters). 1) Do not let the thermocouple stud turn.
CAUTION: DO NOT ALIGN THE THERMOCOUPLE STUD BOX AFTER THE COUPLING
_______ NUT IS TIGHTENED. HOLD THE THERMOCOUPLE STUD BOX AND LOOSEN THE COUPLING NUT TO ALIGN THE THERMOCOUPLE STUD BOX AGAIN. DAMAGE TO THE THERMOCOUPLE STUD BOX CAN OCCUR.
(f) Make sure the thermocouple stud box is aligned.
CAUTION: TOO MUCH TORQUE (MORE THAN THE MAXIMUM TORQUE) ON THE
_______
THERMOCOUPLE PROBE NUTS CAN LOOSEN THEM. IF TOO MUCH
TORQUE IS APPLIED, DAMAGE TO THE THERMOCOUPLE STUDS CAN
OCCUR.
(g)
Tighten the alumel nuts (larger terminal studs) to 18-22
pound-inches (2.034-2.486 newton-meters).
(h)
Tighten the chromel nuts (smaller terminal studs) to 15-18
pound-inches (1.695-2.034 netwon-meters).
(i)
Install the lockwire from the coupling nut to the adapter.
(j)
Tighten the nut that attaches the clamp and ground strap to the bracket on the housing to 36-40 pound-inches (4.067-4.519 newton-meters).
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(2)
Install the wire harness to the 2.9 bleed valve thermocouple probe:
(a)
Attach the wire harness with the two nuts.
(b)
Tighten the larger nut to 18-22 pound-inches (2.034-2.486
newton-meters).
(c)
Tighten the smaller nut to 15-18 pound-inches (1.695-2.034
newton-meters).
(3)
Adjust the W3 harness to get the necessary clearances.
(4)
Install the clamps at all clamp locations (Fig. 401).
S 424-063-N00
S 424-062-N00
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 424-061-N00
(5)
Lubricate threads for the nuts and bolts with engine oil.
S 424-060-N00
(6)
Loosely install the bolts and nuts to the clamps for the W3 wiring harness.
S 424-059-N00
(7)
Make sure the W3 wiring harness is not pulled too tightly between any two clamps.
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(8)
Make sure the W3 wiring harness does not touch any engine parts.
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(9)
Make sure the W3 wiring harness is not pulled too tightly where the wiring harness attaches to the connector.
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(10)
Tighten the nuts and bolts for the harness to 36-40 pound-inches (4.067-4.519 newton-meters).
NOTE: Make sure there is clearance between the W3 and W5 harnesses
____ and the hardware near the lower left of the front side of the gearbox.
H. Put the Airplane Back to its Usual Condition
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WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
Close the left thrust reverser (AMM 78-31-00/201).
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(2)
Close the left core cowl panel (AMM 71-11-06/201).
(3)
Close the left fan cowl panel (AMM 71-11-04/201).
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(4)
Do the activation procedure for the thrust reverser
(AMM 78-31-00/201).
S 414-076-N00 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 发动机燃油和控制 2(43)
