(2)
Check hydraulic reservoirs and service if required.
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FLIGHT CONTROLS SHUTOFF VALVE - REMOVAL/INSTALLATION
1. General
A. The flight controls shutoff valve and the spoiler shutoff valve are identical cartridge units. The flight controls shutoff valve is on the right portion of the modular package and the spoiler shutoff valve is on the left portion of the modular package. This procedure provides instructions for replacement of the flight controls shutoff valve. The complete cartridge unit, motor, and valve may be replaced, or the motor only may be replaced without removing the valve body from the modular package. The motor drive and valve cam are indexed to aid correct motor installation.
2. Removal/Installation Flight Controls Shutoff Valve
NOTE: Use this procedure when replacing the valve assembly consisting of motor and valve. When replacing the motor only, use procedure in par. 3.
A. Equipment and Materials
(1)
Fire Resistant Hydraulic Fluid - BMS 3-11
(2)
Skydrol Assembly Lube - MCS352
B. Remove Flight Controls Shutoff Valve
(1)
Open FLT CONTR SHUTOFF VALVE circuit breaker on circuit breaker panel P6.
(2)
Remove system A hydraulic power. Ensure hydraulic reservoir is depressurized. Refer to 27-51-0, Trailing Edge Flaps - MP.
(3)
Disconnect electrical connector from valve motor (Fig. 401).
(4)
Remove four valve mounting bolts attaching shutoff valve body to modular package housing.
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G02987
Flight controls Shutoff Valve Installation 500
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Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(5)
Carefully remove shutoff valve from modular package housing by turning slightly and lifting straight up.
CAUTION: BE PREPARED TO CATCH SPILLED HYDRAULIC FLUID.
(6)
Take necessary precautions t o prevent dirt entering shutoff valve cavity when valve is removed.
C. Install Flight Controls Shutoff Valve
(1)
Install five O-rings with backup rings on replacement shutoff valve. Lightly lubricate O-rings and backup rings with Hydraulic Fluid or Assembly Lube prior to installation (Fig. 401).
(2)
Carefully insert shutoff valve into modular package housing.
(3)
Install four mounting bolts. Tighten bolts within 30 to 40 pound-inches torque range.
(4)
Install lockwire on four mounting bolts. Ensure that lockwire is installed on low pressure warning switch.
(5)
Install electrical connector at valve motor.
(6)
Close FLT CONTR SHUTOFF VALVE circuit breaker on circuit breaker panel P6.
(7)
Test shutoff valve. Refer to Flight Controls Shutoff Valve - A/T.
(8)
Check hydraulic reservoirs and service if required.
3. Removal/Installation Flight Controls Shutoff Valve Motor
A. Remove Flight Controls Shutoff Valve Motor
(1)
Open FLT CONTR SHUTOFF VALVE circuit breaker on circuit breaker panel P6.
(2)
Disconnect electrical connector from valve motor (Fig. 401).
(3)
Move manual override lever to position 2.
(4)
Remove four mounting screws attaching valve motor to valve. Remove valve motor from valve.
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B. Install Flight Controls Shutoff Valve Motor
(1)
On replacement of valve motor, move manual override lever to position 2.
(2)
Position valve motor on valve and engage motor drive with valve cam (Fig. 401).
(3)
Install the four mounting screws.
(4)
Install lockwire on mounting screws.
(5)
Install electrical connector on valve motor.
(6)
Test shutoff valve. See Flight Controls Shutoff Valve - Adjustment/Test.
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FLIGHT CONTROLS SHUTOFF VALVE - ADJUSTMENT/TEST
1. Test Flight Controls Shutoff Valve
A. Connect electrical power to airplane.
B. Ensure that flight controls switches are ON.
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