136  Wing Landing Gear Well - Right (Aft Bulkhead, Wing Gear Wheel Well)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 C. Install the Pressure Switch
 S 432-105
 (1)  
Remove the plug in the port of the shuttle valve.

 S 432-106

 (2)  
Lubricate the O-rings and the backup rings of the pressure switch and install them on the pressure switch.

 S 422-107

 (3)  
Install the pressure switch on the shuttle valve.

 S 432-108

 (4)  
Install a lockwire to safety the pressure switch to the shuttle valve.

 S 432-109

 (5)  
Remove the cap on the plug of the wire bundle.

 S 432-110

 (6)  
If it is necessary, remove the cap installed on the receptacle of the pressure switch.

 S 432-153

 (7)  
Connect the applicable electrical connector:

 DS280 - to connect the right pressure switch
 DS281 - to connect the left pressure switch.

 S 862-111
 (8)
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 (a)  
P180 DC Power Distribution Panel
 1) 180J25 AUTOBRAKE

 S 712-112
 (9)  Do the "Operational Test - Autobrake Shuttle Valve" task to do a test of the applicable pressure switch.
 TASK 32-42-12-702-113
 6.  Operational Test - Autobrake Shuttle Valve__________________________________________
 A. Special Tools and Equipment
 (1)  Gage, Hydraulic Pressure, 0-4000 psi with a
 0.5625 inch-18 UNF male thread adapter
 (Aeroquip P/N 2266-6-8S) (1 Necessary) -Commercially Available

 NOTE: The adapter permits installation of the
____ pressure gage directly in the bleeder assembly port of the brake unit housing.
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 ALL  ú ú 02 Page 211 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B. References
 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 12-12-01/301, Hydraulic Systems

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (5)  
AMM 32-00-30/201, Landing Gear Door Locks

 (6)  
AMM 32-42-00/501, Brake Control System

 (7)  
AMM 34-21-00/001, Inertial Reference System

 (8)  
AMM 45-10-00/201, Central Maintenance Computer System

 C.
Access

 (1)  
Location Zones
 221 Control Cabin, LH
 222 Control Cabin, RH

 (P8 Pilot's Control Stand)
 735 Wing Landing Gear - Left
 745 Wing Landing Gear - Right
 755 Body Landing Gear - Left
 765 Body Landing Gear - Right

 D. Prepare for the Test
 S 842-114
 (1)  
Make sure that the wheel chocks are installed.

 S 842-115

 (2)  
If it is necessary, release the parking brake.

 S 492-154

 (3)  
Make sure the ground locks are installed in all landing gear (AMM 09-11-00/201).

 S 492-117
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (4)  
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).

 S 492-118

 (5)  
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).

 (6)  
Supply electrical power (AMM 24-22-00/201).

 S 862-155
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