S 394-016
(9)
Apply a fillet seal around the adapter plate with the sealant (AMM 51-31-01/201).
S 414-017
(10)
Install the applicable left or right the main tank access door, 541AB or 641AB (AMM 28-11-01/401).
S 204-131
(11)
Do the leak check for the engine fuel shutoff valve (spar valve).
TASK 28-22-01-824-054
4. Adapter Shaft Alignment (Fig. 402)_______________________
A. Equipment
(1)
B28009-1, Adapter Shaft Alignment Tool
(2)
Torque meter - 0-15 inch-pounds, with a resolution of +/- 1 inch-pound (optional)
B.
References
(1)
AMM 28-22-11/401, Engine Fuel Shutoff Valve Actuator
C.
Access
(1)
Location Zones 541 Main Tank - Rib No. 5 to No. 17 (Left) 641 Main Tank - Rib No. 5 to No. 17 (Right)
(2)
Access Panels
541AB Main Tank Access Door (Left)
641AB Main Tank Access Door (Right)
D.
Procedure
S 484-056
(1)
Do these steps to install the alignment tool in the adapter plate (3):
(a)
Remove the top two index screws from the index plate.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-01
ALL ú ú 02 Page 406 ú May 28/99
A
757
MAINTENANCE MANUAL
(b)
Loosen the bottom index screw, but do not remove it.
(c)
Install the alignment tool (Fig. 402):
(d)
Put the alignment tool in its position with the two guide pins in the holes left by the two index screws that you removed (the scale should be on the top of the tool).
(e)
Make sure the spline on the tool engages with the spline on the shaft.
S 824-057
(2) Do these steps to align the adapter shaft (Procedure 1, optional to Procedure 2):
NOTE: This procedure finds the point where the internal valve
____ butterfly engages the valve seal. The torque required to turn the shaft increases as the butterfly engages the seal, then decreases again as the butterfly leaves the other side of the seal. Once the edge of the seal is found, the valve shaft will then be turned to center the butterfly on the seal.
(a)
Put the tool handle in the extreme counterclockwise position.
(b)
Turn the handle slowly in the clockwise direction at a constant rate while you note the changes in the torque necessary to turn the handle.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 3(20)
