(3)
Insert end of output shaft into input shaft, then carefully slide output shaft into input shaft until actuator mounting flange contacts gate assembly.
CAUTION: TO AVOID DAMAGE TO SPLINED SHAFTS, ACTUATOR ASSEMBLY MUST BE SUPPORTED SO THAT WEIGHT IS NOT ON SHAFT.
(4)
If actuator assembly mounting holes do not line up with mating holes, carefully rotate actuator assembly until holes are aligned.
(5)
Install actuator assembly mounting bolts.
(6)
Connect bonding jumper to actuator assembly.
(7)
Connect electrical plug to actuator assembly. Ensure that any slack in wire bundle is used in a drip loop between plug and nearest clamp and not between clamps. If necessary, loosen last three clamps and reposition slack.
532
Oct 20/86 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 28-22-11 Page 401
CAUTION: ENSURE THAT WIRE BUNDLE HAS BEEN PROTECTED FROM CHAFING BY AN OVERWRAP OF TAPE FROM CONNECTOR PLUG TO JUST BEYOND THIRD CLAMP.
NOTE: Tape used for overwrap is applied with 50% overlap.
(8)
Check electrical bond between actuator assembly and airplane structure per 20-22-01 I/C. Resistance shall not exceed 0.0025 ohm.
(9)
Check functional operation of shutoff valve (Ref 28-22-0 A/T).
5. Removal/Installation of Engine Fuel Shutoff Valve Gate Assembly
A. Check that crossfeed manifold valve is closed.
B. On airplanes with boost pump bypass valve with valve lock actuating arm, remove fuel boost pump bypass valve access plug, for tank numbered same as valve being removed, and install lock assembly to close bypass valve.
C. On ALL EXCEPT airplanes with boost pump bypass valve with valve lock actuating arm, check that there is less than 1,348 pounds of fuel in applicable tank.
D. Remove Engine Fuel Shutoff Valve Gate Assembly
(1)
Disconnect electrical plug from valve (Fig. 401).
(2)
Disconnect bonding jumper from valve.
(3)
Place suitable container under valve to catch fuel.
(4)
Remove gate assembly attaching nuts and washers.
(5)
Carefully withdraw gate assembly from opening in front spar and lift clear.
NOTE: If port adapter assembly is not being removed, check that its mounting bolts were not loosened during removal of gate assembly attaching nuts.
E. Install Engine Fuel Shutoff Valve Gate Assembly
(1)
Clean O-ring groove in gate assembly housing and machined surface of front spar with solvent, wipe dry with lint-free cloth.
(2)
Install new O-ring, lightly lubricated with fuel, into groove on gate assembly housing.
(3)
Carefully insert gate assembly into port adapter through opening in front spar.
(4)
Install gate assembly attaching nuts and washer. Torque 50 to 70 pound-inches.
(5)
Connect electrical plug to actuator assembly. Ensure that any slack in wire bundle is utilized in a drip loop between plug and nearest clamp and not between clamps. If necessary, loosen last three clamps and reposition slack.
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28-22-11 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/86
504 Engine Fuel Shutoff Valve Installation
Nov 15/67 Figure 401 28-22-11
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
CAUTION: ENSURE THAT WIRE BUNDLE HAS BEEN PROTECTED FROM CHAFING BY AN OVERWRAP OF TAPE FROM CONNECTOR PLUG TO JUST BEYOND THIRD CLAMP.
NOTE: Tape used for overwrap is applied with 50% overlap.
(6)
Connect bonding jumper to actuator assembly.
(7)
Check electrical bond between actuator assembly and airplane structure per 20-22-01 I/C. Resistance shall not exceed 0.0025 ohm.
(8)
On airplanes with boost pump bypass valve with valve lock actuating arm, open fuel boost pump bypass valve by removing lock assembly and install access plug.
(9)
Leak-check and check functional operation of shutoff valve (Ref 28-22-0 A/T).
6. Removal/Installation of Engine Fuel Shutoff Valve Port Adapter Assembly
A. Defuel and purge applicable fuel tank (Ref 28-23-0 MP; 28-10-0 MP).
B. Remove applicable fuel tank access panel No. 1 to provide access to rear of wing front spar (Ref 28-11-11 R/I).
C. Remove Engine Fuel Shutoff Valve Port Adapter Assembly
(1)
Perform steps 5.C.(1) thru 5.C.(5) to remove gate assembly.
(2)
Gain access to valve through access panel No. 1 and remove bolts attaching fuel line flanges to port adapter assembly.
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