S 034-005
(5)
Disconnect the DM542 electrical connector from the M542 reset solenoid for the oxygen system.
S 024-006
(6)
Remove the reset solenoid.
(a)
Remove the lockwire.
(b)
Remove the cotter pin, washer, and the pin which attaches the switch bar to the clevis.
(c)
Remove the mounting nut and remove the reset solenoid.
S 034-007
CAUTION: DO NOT ADJUST THE DOUBLE LOCKNUT WHICH ON IS THE SIDE OF THE
_______ FACE OF THE RESET SOLENOID. THIS NUT IS FACTORY-ADJUSTED FOR CORRECT OPERATION. INCORRECT ADJUSTMEENT CAN CAUSE DAMAGE TO THE AIRPLANE.
(7) Remove the clevis and the self-locking nut from the reset solenoid.
TASK 35-21-18-404-008
3. Reset Solenoid Installation (Fig. 401)___________________________
A. References
(1)
AMM 35-00-00/201, Oxygen
(2)
AMM 24-22-00/201, Manual Control
(3)
IPC 35-21-18
(4)
SSM 35-11-01
(5)
WDM 35-11-11
B. Access
(1) Location Zone 124 Forward Cargo Container Compartment, Aft Half Right
C. Procedure
S 914-022
(1)
Read and obey the safety precautions and general instructions before you do the maintenance (AMM 35-00-00/201).
(2)
Install the self-locking nut and the clevis on the reset solenoid.
S 424-010
(3)
Install the reset solenoid.
S 434-009
(a) Install the reset solenoid with the mounting nut.
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747-400
MAINTENANCE MANUAL
CAUTION: DO NOT ADJUST THE DOUBLE LOCKNUT WHICH IS LOCATED ON THE
_______ SIDE OF THE FACE ON THE RESET SOLENOID. THIS NUT IS FACTORY-ADJUSTED FOR CORRECT OPERATION. IF ADJUSTED IT CAN CAUSE DAMAGE TO THE AIRPLANE.
(b)
Adjust the levis and the self-locking nut to fit the switch bar position.
(c)
0146 Put the clevis in a position to get a clearance of a maximum of 0.01 inches.
NOTE: This clearnance must be between the reset lever on
____ each control umit and its plunger (Fig. 401).
(d)
Install the switch bar on the clevis with the pin, washer, and the cotter pin.
(e)
Tighten the bushings on switch bar.
(f)
Make sure that clearance is kept between the reset lever on each control lever and its plunger.
S 434-011
(4)
Connect the DM542 electrical connector to the M542, reset solenoid.
S 864-012
(5)
Supply the electrical power (AMM 24-22-00/201).
Oxygen System Reset Solenoid Installation Figure 402
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747-400 MAINTENANCE MANUAL
(6) S 864-013Remove the DO-NOT-CLOSE tag and close these circuit breakers: (a) P7 Overhead Circuit Breaker Panel 1) 7D4 OXYGEN VALVE & IND 2) 7D3 OXY RESET PWR
(7) S 714-014Make sure the reset solenoid operates correctly. (a) Momentarily move the oxygen switch on the P5 panel to RESET. (b) Make sure the switch bar moves and the position indicator on each flow control unit moves to OFF.
(8) S 434-015Install a lockwire on the mounting nut.
(9) S 864-016Remove the electrical power if it is not necessary (Ref 24-22-00/201).
S 864-026
WARNING:_______OPEN THE SHUTOFF VALVE ON EACH OXYGEN CYLINDER SLOWLY. IF NOT, HIGH TEMPERATURES CAN OCCUR WHICH CAN START AN IGNITION WITH THE OXYGEN. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRPLANE AND EQUIPMENT. 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 氧氣 OXYGEN(93)
