(f)
Clean the screen filter with ultrasonic.
(g)
Lubricate the new O-rings (4 and 6) with clean hydraulic fluid.
(h)
Install the new O-ring (6) on the reducer (7), and install the reducer in the screen filter (5).
(i)
Install the new O-ring (4) on the screen filter (5).
(j)
Install the screen filter (5) into the normal antiskid module.
(k)
Remove the plug from the hydraulic line and connect the hydraulic line to the screen filter (5).
S 862-127
(9)
Pressurize hydraulic system No. 4 (AMM 29-11-00/201).
S 212-128
(10)
Look at the HYD BRAKE PRESS gage on the captain's instrument panel, and make sure it show 3000 |200 psi pressure.
S 712-129
(11)
Push the brake pedals slowly and fully five times to operate the brakes.
S 212-130
(12)
After five minutes look to make sure there are no leaks around the screen filter (5) and the inlet filter cover (2) on the normal antiskid module.
S 712-131
(13)
Push the brake pedals three times to operate the brakes, while you examine the brake operation at the antiskid module in which the new filter was installed.
NOTE: Look for brake piston movement to make sure the brake
____
operates correctly.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-42-02
ALL ú ú 01 Page 233 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 862-132
(14)
Set the parking brake. S 092-133
CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(15)
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
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-42-02
ALL ú ú 01 Page 234 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
TASK 32-42-02-022-134
12. Antiskid Module Inlet Filter (Alternate Antiskid 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)
AIPC 32-42-02, Fig. 1
B.
Access
(1)
Location Zones
135 Wing Landing Gear Well - Left (Forward bulkhead, wing gear wheel well) Alternate Antiskid Module - Left Wing Gear
136 Wing Landing Gear Well - Right (Forward bulkhead, wing 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
C. Prepare for the Removal
S 492-135
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 492-215
(2)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
(3)
Make sure that the chocks are installed at all the wheels.
S 862-216
(4)
Remove the pressure from hydraulic systems No. 1 and 2 and the reservoirs (AMM 29-11-00/201).
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