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C.  Check that manual override lever on shutoff valve is at position 1.
D.  Turn on hydraulic system B pump No. 1 or 2 to pressurize hydraulic system B.
E.  If shutoff valve in modular package in left wheel well is being tested, open hydraulic interconnect valve to pressurize hydraulic system A.
F.  Check for hydraulic leakage at shutoff valve.
G.  Rotate aileron control wheel to bleed hydraulic system.
H.  Actuate aileron control wheel, control column and rudder pedals to check response of ailerons, elevators and rudder.
I.  Position both flight controls switches to OFF.
J.  Check that manual override lever on shutoff valve is at position 2 for System A and System B.
K.  Cycle rudder pedals and check that pedal forces are higher than in step H.
NOTE: Rudder must not operate hydraulically during this test. Unpowered rudder will move.
L.  Position flight controls switches to ON.
M.  Turn off hydraulic system B pumps No. 1 and 2 and close hydraulic interconnect valve.
N.  Determine whether there is any further need for electrical power on airplane; if not, disconnect electrical power.
Sep 20/81 27-09-211 Page 501 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

SPOILER SHUTOFF VALVE - REMOVAL/INSTALLATION
1.  General
A.  The spoiler shutoff valve and flight controls shutoff valve are identical cartridge units. The spoiler shutoff valve is on the left portion of the modular package and the flight controls shutoff valve is on the right portion of the modular package. This procedure provides instructions for replacement of the spoiler 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 Spoiler Shutoff Valve
NOTE:  Use this procedure when replacing 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 Spoiler Shutoff Valve
(1)  
Open SPOILER SHUTOFF VALVE circuit breaker on circuit breaker panel P6.

(2)  
Remove system A hydraulic power. Check that hydraulic reservoir is depressurized. Refer to 27-61-0, Flight Spoiler Control System - MP.

(3)  
Disconnect electrical connector from valve motor (Fig. 401).

(4)  
Remove four valve mounting bolts attaching shutoff valve body to modular package housing.

500 
Feb 15/73  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  27-09-221 Page 401 

G02988
Spoiler Shutoff Valve Installation  500 
27-09-221  Figure 401  May 15/67 
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 to prevent dirt entering shutoff valve cavity when valve is removed.

C.  Install Spoiler Shutoff Valve
(1)  
Install five 0-rings with backup rings on replacement shutoff valve. Lightly lubricate 0-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. Check that lockwire is installed on low pressure warning switch.

(5)  
Install electrical connector at valve motor.

(6)  
Close SPOILER SHUTOFF VALVE circuit breaker on circuit breaker panel P6.

(7)  
Test shutoff valve. Refer to Spoiler Shutoff Valve - A/T.

(8)  
Check hydraulic reservoirs and service if required.

3.  Removal/Installation Spoiler Shutoff Valve Motor
A.  Remove Spoiler Shutoff Valve Motor
(1)  
Open SPOILER 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.

500 
　
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