(e)
Turn the shaft clockwise again at approximately the same rate that you used before.
(f)
Stop at the position where the torque increases to approximately two-thirds of the maximum torque that you wrote down before.
(g)
Read the scale on the tool at this position.
NOTE: This is the position where the valve butterfly starts to
____
engage the edge of the seal.
(h) Turn the handle 13 more degrees in the clockwise direction past the reading from the previous step.
NOTE: The butterfly valve is now centered on the valve seal.
____ If you turn the valve past the target value, do not turn it back in the counterclockwise direction. You must start again with the tool handle in the extreme counterclockwise position.
S 822-005
(4)
Tighten the lockscrew on the tool to keep the adapter shaft in its position.
S 822-006
(5)
Turn the index plate until the actuator mounting holes in the index plate are aligned with the two upper holes for the actuator mounting screws.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-00-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 822-007
(6)
Insert the two align screws into the holes for the actuator mounting screws to hold the index plate in alignment with the mounting plate (this is a final adjustment of the position of the index plate).
S 822-008
(7)
Tighten the bottom index screw to a torque of 21-23 pound-inches.
S 822-009
(8)
Carefully remove the align screws.
S 822-010
(9)
Carefully remove the alignment tool from the index plate.
S 822-011
CAUTION:_______CORRECTLY INSTALL LOCKWIRE ON MOUNTING SCREWS. INCORRECT LOCKWIRING WOULD INTERFERE WITH MANUAL OVERRIDE HANDLE AND PREVENT VALVE FROM OPENING.
(10)
Install the top two index screws in the index plate and tighten them to a torque of 21-23 pound-inches.
S 412-029
(11)
Install the actuator.
E.
Adapter Shaft Alignment Manual Method (Fig. 202):
S 652-028
(1)
Defuel the applicable fuel tank (AMM 28-26-00/201).
S 862-014
(2)
Electrically put the valve actuator to the open position and then to the closed position.
(a)
Make sure that the actuator is in the closed position.
(3)
Remove the applicable fuel tank access door (AMM 28-11-02/401).
(4)
Purge and prepare applicable tank for entry (AMM 28-11-00/201).
(5)
Remove the applicable actuator.
S 012-015
S 012-016
S 012-017
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A
747-400 MAINTENANCE MANUAL
S 822-018
(6) Loosen the bolts (3 locations) that hold the index plate to the
adapter shaft.
S 822-019
(7) Put the actuator or MIT65B92408-1 Tool into the splined bore of the
adapter plate/shaft and turn the actuator or MIT65B92408-1 Tool
until the index arrows on the valve body align.
NOTE:____ Keep the actuator in this closed position.
S 822-020
(8)
Turn the index plate only until the mounting holes (4 locations) align with the actuator or MIT65B92408-1 Tool holes.
S 822-021
(9)
Mark the position of the index plate and then remove the actuator or MIT65B92408-1 Tool.
S 822-022
(10)
Tighten the bolts (3 locations) that hold the index plate to the adapter plate/shaft and lockwire the bolts in position.
S 822-023
CAUTION: MAKE SURE THE LOCKWIRE DOES NOT INTERFERE WITH THE FREE
_______ MOVEMENT OF THE MANUAL OVERRIDE LEVER. IF THE MANUAL OVERRIDE LEVER DOES NOT MOVE FREELY, IT CAN PREVENT THE VALVE FROM OPENING.
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本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 1(14)
