32-53-04
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 494-003
WARNING: USE THE PROCEDURE IN AMM 32-00-30/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS MOVE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT IF THE LOCKS ARE NOT CORRECTLY INSTALLED.
(2)
Install the door locks on the wing and body gear doors
(AMM 32-00-30/201).
S 864-004
(3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7 Overhead Circuit Breaker Panel
1) 7G23 BODY GR STRG ARM AC
2) 7G24 BODY GR STRG ARM DC
S 844-005
(4)
Remove the pressure from the No. 1 hydraulic system
(AMM 29-11-00/201).
D.
Remove the Control Module (Fig. 401)
S 034-006
(1)
Disconnect the three electrical connectors from the control module you will remove:
(a)
Right control module: 1) The electrical connector DX343A for the solenoid valve 2) The electrical connector DX343B for the pressure switch 3) The electrical connector DX343C for the servo valve.
(b)
Left control module: 1) The electrical connector DX358A for the solenoid valve. 2) The electrical connector DX358B for the pressure switch. 3) The electrical connector DX358C for the servo valve.
(2)
Install caps on the plugs and receptacles.
(3)
Disconnect the hydraulic lines from the module assembly.
S 034-007
S 034-008
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32-53-04
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
CONTROL
MODULE
SEE A
RETURN
LINE
PRESSURE LINE
BRACKET
CHECK VALVE
SOLENOID VALVE
ELECTRICAL
CONNECTOR
ELECTRICAL
CONNECTOR
SERVO VALVE
ELECTRICAL CONNECTOR
PRESSURE SWITCH
NUT
RETRACT PORT
RIGHT ACTUATOR LEFT ACTUATOR EXTEND PORT EXTEND PORT
CONTROL MODULE
A
Control Module for the Body Gear Steering Figure 401
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32-53-04
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 494-043
(4)
Install plugs in the hydraulic lines.
S 024-009
(5)
Hold the module assembly and remove the washers and nuts.
S 024-044
(6)
Remove the module assembly.
S 034-010
(7)
If they are needed for installation on the replacement module assembly, remove the hydraulic fittings and the check valve from the ports of the module assembly.
S 034-045
(8)
Discard the O-rings and the backup rings.
S 494-046
(9)
Install plugs in the ports.
TASK 32-53-04-404-011
3. Install the Control Module Assembly for the Body Gear Steering______________________________________________________________
A. General
(1) The table that follows has port/label and bit data. This data is necessary when you do the test of the control module.
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