S 094-050
(12)
Do this task: "Removal of the Door Locks from the body Landing Gear" (AMM 32-00-30/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
PARKING BRAKE VALVE ASSEMBLY - REMOVAL/INSTALLATION
___________________________________________________
1. General
_______
A. This procedure contains two tasks:
(1)
The removal of the assembly of the parking brake valve (referred to as the valve assembly)
(2)
The installation of the valve assembly.
B.
The valve assembly is installed on the parking brake module. It contains the parking brake valve and an electric motor. The parking brake module is installed on the keel beam in the wheel well for the right body landing gear. The electric motor stays on the valve assembly during the removal and the installation. For a removal/installation of the electric motor see AMM 32-44-08/401.
C.
During this procedure, you must make sure that contamination does not go into the module.
TASK 32-44-05-004-052
2. Removal of the Parking Brake Valve Assembly (Fig. 401)
___________________________________________
A. References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-11-00/201, Main Hydrualic Supply System
(4)
AMM 32-00-30/201, Landing Gear Door Locks
(5)
IPC 32-44-04 Fig. 1
(6)
SSM 32-44-01
(7)
WDM 32-44-11
B.
Access
(1)
Location Zones
138 Body Landing Gear Well - Right
221 Control Cabin, L.H.
222 Control Cabin, R.H.
C.
Prepare for the Removal
S 494-010
WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Install the ground locks in all landing gear (AMM 09-11-00/201).
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A
747-400
MAINTENANCE MANUAL
SEE A
SEE B VALVE ASSEMBLY CAP SCREW WASHER
FWD INBOARD BULKHEAD RIGHT BODY GEAR WHEEL WELL
A
ELECTRICAL CONNECTOR
O-RINGS AND BACKUP RINGS
FWD
PARKING BRAKE
B
MODULE ASSEMBLY
Parking Brake Valve Assembly Installation
Figure 401
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A
747-400
MAINTENANCE MANUAL
S 494-011
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 DAMAGE TO EQUIPMENT.
(2)
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).
S 494-012
(3)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
S 864-055
(4)
Supply electrical power (AMM 24-22-00/201).
S 864-056
(5)
Make sure this circuit breaker is closed:
(a)
P6 Main Power Distribution Panel 1) 6L18 PARK BRAKE
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