AUTOBRAKE SHUTTLE VALVE
SEE A
HYDRAULIC LINE
CONNECTOR
ADAPTER
O-RINGS
O-RINGS
BRAKE METERED PRESSURE SWITCH
BACKUP RINGS
SHUTTLE VALVE
WASHER (4 LOCATIONS)
BOLT
(4 LOCATIONS)

O-RING
BACKUP RING
O-RING
ADAPTER
HYDRAULIC LINE
BACKUP 
RING 
NUT 
SUPPORT 
BRACKET 
O-RINGS 
ADAPTER 
BACKUP 
RING 
HYDRAULIC LINE 

AUTOBRAKE SHUTTLE VALVE
A
NOTE: THE LEFT SIDE INSTALLATION IS SHOWN,THE RIGHT SIDE INSTALLATION IS EQUIVALENT.
Shuttle Valve Installation Figure 201
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 D. Remove the Shuttle Valve
 S 022-068
 (1)  
Do these steps to remove the shuttle valve:

 (a)  
Disconnect the three hydraulic lines from the shuttle valve.

 (b)  
Put caps or plugs on the ends of the open hydraulic lines.

 (c)  
Disconnect the applicable electrical connector:

 DS280 - to disconnect the right shuttle valve DS281 - to disconnect the left shuttle valve.

 (d)  
Put a cap on the plug of the wire bundle.

 (e)  
Put a cap on the receptacle of the pressure switch.

 (f)  
Remove the four sets of bolts, nuts and washers that attach the shuttle valve to the support bracket.

 (g)  
Remove the shuttle valve from the airplane.

 S 032-069
 (2)  
Remove the lockwire that safeties the pressure switch to the shuttle valve.

 S 032-070

 (3)  
Remove the pressure switch from the shuttle valve.

 S 032-071

 (4)  
Remove the O-rings and the backup rings from the pressure switch and discard the O-rings.

 S 032-072

 (5)  
Remove the adapters from the shuttle valve.

 S 032-073

 (6)  
Remove the O-rings and the backup rings from the adapters and discard the O-rings.

 (7)  
Put plugs in the open ports of the shuttle valve.

 S 032-074
 TASK 32-42-12-402-075
 3.  Shuttle Valve - Installation (Fig. 201)____________________________
 A. Special Tools and Equipment
 (1)  Explosion-proof Bonding Meter (Microhom Bridge,
 Type W Boding Meter) - Model T207 or Equivalent
 Avtron Manufacturing Inc.
 Cleveland, Ohio USA

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 B. Consumable Materials
 (1)  D00288 Lubricant - MCS 352
 NOTE:  Use BMS 3-11 or MCS 352 to lubricate the
____
 O-rings and fittings on the valve
 assembly.

 (2)  D00196 Hydraulic Fluid - BMS 3-11
 NOTE:  Use BMS 3-11 or MCS 352 to lubricate the
____
 O-rings and fittings on the valve
 assembly.

 C. Reference
 (1)  
SWPM 20-20-00

 D.
Access

 (1)  
Location Zones
 118 Electrical & Electronics Compartment, RH
 (P180 DC Power Distribution Panel)
 135 Wing Landing Gear Well - Left
 (Aft Bulkhead, Wing Gear Wheel Well)

 136  Wing Landing Gear Well - Right (Aft Bulkhead, Wing Gear Wheel Well)
 E. Install the Shuttle Valve
 S 432-076
 (1)  
If it is necessary, remove the plugs in the ports of the shuttle valve.

 S 432-077

 (2)  
Lubricate the O-rings and the backup rings of the three adapters and install them on the adapters.

 (3)  
Install the three adapters in the ports of the shuttle valve.

 S 432-079