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747-400
MAINTENANCE MANUAL

 (4)  
WDM 32-42-14, WDM 32-42-15, WDM 32-42-16, WDM 32-42-17

 (5)  
SSM 32-42-01

 E.
Access

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

 137  Body Landing Gear Well - Left (Forward bulkhead, body gear wheel well) Alternate Antiskid Module - Left Wing Gear
 138  Body Landing Gear Well - Right (Forward bulkhead, body gear wheel well) Alternate Antiskid Module - Right Wing Gear
 137  Body Landing Gear Well - Left (Aft bulkhead, body gear wheel well) Alternate Antiskid Module - Left Body Gear
 138  Body Landing Gear Well - Right (Aft bulkhead, body gear wheel well) Alternate Antiskid Module - Right Body Gear
 F. Procedure (Fig. 202)
 S 492-039
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS 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.
 (1)  
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).

 S 492-202

 (2)  
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).

 S 642-040

 (3)  
Lubricate the new O-rings (3 and 5) and the retainers (2 and 4) with clean hydraulic fluid.

 S 432-041
 CAUTION: BE CAREFUL TO KEEP CONTAMINATION OUT OF THE PORTS OF THE
_______ ANTISKID MDOULE AND THE ANTISKID VALVE. CONTAMINATION CAN CAUSE A MALFUNCTION OF THE ANTISKID VALVE.
 (4)  Use the packing installation tool to install the O-rings (3 and 5) and the retainers (2 and 4) on the antiskid valve assembly (1).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 422-042
 (5)  
Install the antiskid valve assembly (1) into the alternate antiskid module with 4 screws (6).

 (a)  
Tighten the screws to 100-110 pound-inches.

 S 432-043
 CAUTION: MAKE SURE THE CORRECT CONNECTOR IS INSTALLED ON THE ANTISKID
_______ VALVE TORQUE MOTOR. INCORRECT WIRE CONNECTION CAN CAUSE A MALFUNCTION IN THE ANTISKID SYSTEM.
 (6)  Install the clamp and connect the wire bundle to the connector of the applicable antiskid valve torque motor:
 CONNECTORS
__________
 Left Wing Gear Alternate Antiskid Module
 Valve No. A2 Valve No. A1
 DV35 DV129
 Right Body Gear Alternate Antiskid Module
 Valve No. A5 Valve No. A6
 DV131 DV38
 Left Body Gear Alternate Antiskid Module
 Valve No. A3 Valve No. A4

 DV130 DV36
 Right Wing Gear Alternate Antiskid Module
 Valve No. A7 Valve No. A8
 DV132 DV37

 S 862-044
 (7)  
Pressurize hydraulic system No. 1 (AMM 29-11-00/201).

 S 712-045

 (8)  
Push the brake pedals slowly and fully five times to operate the brakes.

 S 212-046

 (9)  
After five minutes, look to make sure there are no leaks around the antiskid valve assembly.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL

 S 862-047
 (10)
 Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P180, DC Power Distribution Panel
 1) 180J7, ANTI-SKID 1-3
 2) 180J8, ANTI-SKID 14-16
 3) 180F7, ANTI-SKID 2-4
 4) 180F8, ANTI-SKID 13-15
　
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