(5)
Use the removal and installation tool to install the shutoff valve (2) into the normal antiskid module.
S 432-191
(6)
Install the four screws (1) and tighen to 100-110 pound-inches.
S 862-177
(7)
Pressurize hydraulic system No. 4 (AMM 29-11-00/201).
S 212-178
(8)
Look at the HYD BRAKE PRESS gage on the captain's instrument panel, and make sure it shows 3000 |200 psi.
S 212-179
(9)
Push the brake pedals slowly and fully five times to operate the brakes.
S 212-180
(10)
After five minutes look to make sure there are no leaks around the shutoff valve on the normal antiskid module.
S 712-181
(11)
Push the brake pedals three times to operate the brakes, while you examine the brake operation at the antiskid module in which the new shutoff valve was installed.
NOTE: Look for brake piston movement to make sure the brake
____ operates correctly.
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747-400 MAINTENANCE MANUAL
S 862-182
(12)
Set the parking brake. S 092-183
CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(13)
Remove the main landing gear door locks and close the doors (AMM 32-00-30/201).
WARNING:_______ YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE
QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCK CORRECTLY. THIS CAN
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747-400 MAINTENANCE MANUAL
ANTISKID MODULE ASSEMBLY - REMOVAL/INSTALLATION
_______________________________________________
1. General
_______
A. This procedure contains four tasks. The first and second tasks remove and install the normal antiskid module, respectively. The third and fourth tasks remove and install the alternate antiskid module, respectively.
B. The two different types of antiskid module assemblies used on this airplane are the normal antiskid module and the alternate antiskid module. The normal antiskid module, one for each truck, contains four antiskid valves and a shutoff valve. The alternate antiskid module, one for each truck, contains two antiskid valves and no shutoff valve. Different procedures are used to remove each type module.
TASK 32-42-02-004-001
2. Normal Antiskid Module Assembly - Removal
_________________________________________
A. References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
AIPC 32-42-02-11
(4)
SSM 32-42-01
(5)
WDM 32-42-14, WDM 32-42-15, WDM 32-42-16, WDM 32-42-17
B.
Access
(1)
Location Zones 118 Electrical & Electronics Compartment, RH (P180 DC Power Distribution Panel)
137 Body Landing Gear Well - Left (Aft bulkhead, body gear wheel well) Normal Antiskid Module - Left Body Gear
138 Body Landing Gear Well - Right (Aft bulkhead, body gear wheel well) Normal Antiskid Module - Right Body Gear
571 Rear Spar to Landing Gear Support Beam, LH (Above the wing gear trunion) Normal Antiskid Module - Left Wing Gear
671 Rear Spar to Landing Gear Support Beam, RH (Above the wing gear trunion) Normal Antiskid Module - Right Wing Gear
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