S 862-159
(15)
Pressurize hydraulic system No. 4 (AMM 29-11-00/201).
S 862-160
(16)
Set the parking brake.
S 842-161
(17)
Remove the pressure from hydraulic systems No. 1 and 4 (AMM 29-11-00/201).
S 092-190
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 CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(18) Remove the main landing gear door locks and close the doors (AMM 32-00-30/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-42-02
ALL ú ú 01 Page 241 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 32-42-02-022-162
14. Antiskid Shutoff Valve (Normal Antiskid Module) - Removal
_________________________________________________________
A. Special Tools and Equipment
(1)
T63577 - Removal and Installation Tool
Hydro-Aire Division, Crane Co.
Burbank, CA 91510 USA
B.
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, Fig. 11
(4)
Location Zones
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
C. Prepare for the Removal
S 492-163
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 492-219
(2)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
(3)
Make sure that the wheel chocks are installed at all the wheels.
S 862-220
(4)
Remove the pressure from hydraulic system No. 4 and the reservoir (AMM 29-11-00/201).
(5)
Release the parking brake.
S 492-164
S 842-221
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-42-02
ALL ú ú 01 Page 242 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 862-167
(6)
Release hydraulic fluid from the brake accumulator with these steps:
(a)
Push on the brake pedals fully 10 times.
(b)
Look at the HYD BRAKE PRESS gage on the captain's instrument panel, and make sure the pressure stays the same after the last time you press the brake pedals.
D.
Remove the Shutoff Valve (Normal Antiskid Module) (Fig. 207)
S 022-168
(1) Remove the four screws (1), and use the Removal and Installation Tool to remove the shutoff valve (2) from the normal antiskid module.
S 032-169
CAUTION: BE CAREFUL TO KEEP CONTAMINATION OUT OF THE PORTS OF THE
_______ ANTISKID MODULE. CONTAMINATION CAN CAUSE A MALFUNCTION IN THE ANTISKID VALVE MODULE.
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