(b)
Remove O-ring from connector on valve.
(c)
Seal the connector with a cap and seal the receptacle with a plug.
CAUTION: MAKE SURE THAT NO CONTAMINATION GOES IN THE OPEN PORTS ON
_______ THE CONTROL MODULE. THIS CAN CAUSE DAMAGE TO THE EQUIPMENT.
(d) Remove the seal plate from the control module.
TASK 32-53-06-404-007
3. Install Body Gear Steering Module Solenoid Valve________________________________________________
A. General
(1) The table that follows contains port/label and bit data. This information is necessary when you do the test of the solenoid valve (on the control module for the steering system of the body landing gear).
~.......................................................................... | BIT TABLE | ............................................................................ | | Bit Condition | ............................................................................ | Switch | Port/Label | Bit | 0 | 1 | ............................................................................ | L BODY GEAR | C/026/005/10 | 15 | NO PRESSURE| PRESSURE | | PRESS | | | | | ............................................................................ | R BODY GEAR | C/026/004/01 | 15 | NO PRESSURE| PRESSURE | | PRESS | | | | | 2................…...................…..........…............….............1
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
B. Consumable Materials
(1)
D00153 Hydraulic Fluid, BMS 3-11
C.
References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
AMM 32-21-03/201, Nose Gear Torsion Links
(4)
AMM 32-53-11/201, Body Gear Steering Actuators and Yoke Assembly
(5)
IPC 32-53-05 Fig. 1
D.
Access
(1)
Location Zone
755 Body Landing Gear, LH
765 Body Landing Gear, RH
E.
Install the Solenoid Valve (Fig. 401)
S 494-008
WARNING: REFER TO AMM 32-00-30/201 FOR THE LOCK INSTALLATION PROCEDURE.
_______ 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)
Make sure that you install the door locks of the wing and the body landing gear (AMM 32-00-30/201).
S 424-009
(2)
Install the solenoid valve.
(a)
Install the new O-ring on the connector at the bottom of the solenoid valve.
(b)
Put a new seal plate on the ports of the control module.
(c)
Put the solenoid valve in its position on the seal plate and install the 4 capscrews. 1) Tighten the capscrews to a torque of 95 to 100
pound-inches.
S 864-010
(3) Pressurize hydraulic system No. 1 (AMM 29-11-00/201).
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A
747-400 MAINTENANCE MANUAL
S 794-011
(4)
Do a check of the hydraulic connections for leaks.
F.
Solenoid Valve Test
S 014-012
(1)
Disconnect the torsion links of the nose landing gear at the apex (AMM 32-21-03/201).
S 014-013
(2)
Disconnect the steering actuators of the body landing gear from the torsion link (AMM 32-53-11/201).
S 864-014
(3)
Close the circuit breakers as follows for the steering system of the body landing gear:
(a)
P7 Overhead Circuit Breaker Panel
1) 7G23 BODY GR STRG ARM AC
2) 7G24 BODY GR STRG ARM DC
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