S 434-013
(3)
Tighten the jam nut.
S 434-014
(4)
Install the two nuts and washers which connect the top of the support bracket to the regulator washer.
S 434-015
(5)
Install the two bolts and washers which connect the bottom of the support bracket to the regulator.
S 434-016
(6)
Connect the tubing to the inlet and outlet of the regulator.
S 864-017
(7)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel:
(a) 6H6, FIRE EXTINGUISHER LOWER CARGO
(8)
Do the System Test for Metered Discharge Line (AMM 26-23-00/501).
S 734-018
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FILTER/DRYER - REMOVAL/INSTALLATION
___________________________________
1. General
_______
A. The filter/dryers are installed in the right side of the ceiling in the forward cargo compartment and the aft cargo compartment.
B. The removal/installation procedure is the same for each filter/dryer.
TASK 26-23-04-004-001
2. Remove the Filter/Dryer (Fig. 401)
_______________________
A. Access
(1) Location Zones 124 Forward Cargo Container Compartment Aft Half 142 Aft Cargo Container Compartment R.H.
B. Procedure
S 864-002
(1) Open this circuit breaker on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tags:
(a) 6H6, FIRE EXTINGUISHER LOWER CARGO
S 014-003
(2)
Get access to the filter/dryer.
S 034-004
(3)
Disconnect the tubing connected to the inlet and outlet of the filter/dryer.
S 024-005
(4)
Pull the filter/dryer out of the support bracket and remove the filter/dryer.
NOTE: If a fire bottle was discharged through the filter/dryer,
____ you must replace the filter/dryer with a new one.
TASK 26-23-04-404-006
3. Install the Filter/Dryer (Fig. 401)
________________________
A. References
(1) AMM 26-23-00/501, Lower Cargo Fire Extinguishing System
B. Access
(1) Location Zones 124 Forward Cargo Container Compartment Aft Half 142 Aft Cargo Container Compartment R.H.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A
SEE A
TUBE FITTING
SUPPORT BRACKET
FILTER/DRYER
FLOW DIRECTION
TUBE FITTING FILTER/DRYER
A
Filter/Dryer Installation Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
C. Procedure
S 864-012
(1)
Make sure the inner part of the filter/dryer is not broken.
S 424-007
(2)
Put the filter/dryer in the support bracket.
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