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747-400 MAINTENANCE MANUAL
 E.  Install the Pressure Switch for the Solenoid Shutoff Valve or the Servo Control Valve
 S 492-149
 (1)  Make sure the ground locks are installed in all landing gear (AMM 09-11-00/201).
 S 492-150
 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 DAMGE TO EQUIPMENT.
 (2)  Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
 S 642-151
 CAUTION: BE CAREFUL TO KEEP ALL CONTAMINATION OUT OF THE AUTOBRAKE
_______ PRESSURE-CONTROL MODULE. CONTAMINATION CAN CAUSE DAMAGE TO THE MODULE.
 (3)  
Lubricate the new O-rings with lubricant.

 S 432-099

 (4)
Install the O-rings and the backup rings on the pressure switch.

 S 422-100

 (5)  
Install the pressure switch on the module and tighten to 90-110 pound-inches with the torque adapter.

 S 432-101

 (6)
Connect the electrical connector specified below to the applicable

 pressure switch. ~.................................................................... | PRESSURE SWITCH | Solenoid Shutoff Valve | Servo Control Valve | | ................................................... | CONNECTOR NO. | DM439C | DM439D | 2..................…..........................…......................1
 S 862-157
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER, THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (7)  Pressurize hydraulic system No. 4 and the reservoir
 (AMM 29-11-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 (8)  S 862-152Remove the DO-NOT-CLOSE tag and close this circuit breaker: (a) P180 DC Power Distribution Panel 1) 180J25, AUTOBRAKE
 (9)  S 712-153Do the Brake System BITE Test procedure in the "Ground Tests - Brake Control System" task (AMM 32-42-00/501).
 S 712-154

 (10)
 Do the Autobrake Application Test procedure in the "Ground Tests -Brake Control System" task (AMM 32-42-00/501).

 S 212-105

 (11)
 Stop for five minutes and examine for leaks around the pressure switch.

 S 862-106

 (12)
 Set the parking brake.

 S 092-108

 (13)
 Do this task:  "Removal of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 AUTOBRAKE PRESSURE CONTROL MODULE - REMOVAL/INSTALLATION
________________________________________________________
 1.  General_______
 A.  This procedure contains the removal task and the installation task for the autobrake pressure control module.
 TASK 32-42-11-004-001
 2.  Autobrake Pressure Control Module - Removal___________________________________________
 A.  References
 (1)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (2)  
AMM 32-00-30/201, Landing Gear Door Locks

 (3)  
IPC 32-42-11

 (4)  
SSM 32-41-01

 (5)  
WDM 32-41-31

 B.  
Access

 (1)  
Location Zones 118 Electrical & Electronics Compartment, RH (P180 DC Power Distribution Panel)
　
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