24-11-01
ALL ú ú 06 Page 620 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
SCAVENGE FILTER - REMOVAL/INSTALLATION
______________________________________
1. General_______
A. This procedure has two tasks. One task is the removal of the scavenge filter for the IDG. The other task is the installation of the filter.
B. The scavenge filter is installed on the aft end of the IDG case.
C. Open the left thrust reverser half to get access to the scavenge filter.
D. You can not use the filter element again after you remove it. You must always install a new filter element.
TASK 24-11-04-004-001
2. Scavenge Filter Removal (Fig. 401)_______________________
A. Standard Tools and Equipment
(1)
Container - 5 U.S. gallon (20 liter) capacity, suitable to collect oil drainage from IDG
B.
References
(1)
24-11-00/201, Generator Drive System
(2)
78-31-00/201, Thrust Reverser System
(3)
IPC 24-11-01 Fig. 10
C.
Access
(1)
Location Zone 412 Engine 1 - Main Gearbox Aft Face 7 o'clock 422 Engine 2 - Main Gearbox Aft Face 7 o'clock 432 Engine 3 - Main Gearbox Aft Face 7 o'clock 442 Engine 4 - Main Gearbox Aft Face 7 o'clock
(2)
Access Panel
415 Left Thrust Reverser Half - Engine 1
425 Left Thrust Reverser Half - Engine 2
435 Left Thrust Reverser Half - Engine 3
445 Left Thrust Reverser Half - Engine 4
D.
Procedure
(1)
Open the left thrust reverser half (Ref 78-31-00/201).
S 014-002
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24-11-04
ALL ú ú 02 Page 401 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A
MAIN GEARBOX DRIVE GENERATOR INTEGRATED SEE B COUPLING DRAIN OVERFLOW SEE C
DRIVE GENERATOR INTEGRATED A
FWD DRAIN PLUG IDG CASE
O-RINGS COVER FILTER BOTTOM VIEW ELEMENT FILTER INDICATOR OIL-LEVEL BUTTON RED
B
NORMAL (RESET) EXTENDED PRESSURE DIFFERENTIAL INDICATOR C Scavenge Filter Installation Figure 401
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24-11-04
ALL ú ú 01 Page 402 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 214-025
(2)
Examine the red button on the pressure differential indicator.
(a)
If the red button extends from the pressure differential indicator, do the DPI extension check (AMM 24-11-01/601).
S 864-004
(3)
Release the pressure from the IDG oil system (Ref 24-11-00/201).
S 024-026
(4)
Remove the filter cover.
(a)
Put a container below the IDG to collect oil from the filter cavity.
WARNING:_______REMOVE THE FILTER COVER CAREFULLY. WEAR GOGGLES, INSULATED GLOVES, AND OTHER PROTECTIVE GEAR. HOT OIL CAN FLOW FROM THE SCAVENGE FILTER WHEN YOU REMOVE THE FILTER COVER. HOT OIL CAN CAUSE INJURY TO PERSONS.
(b)
Remove the filter cover.
(c)
Drain the oil from the filter cavity into the container.
(d)
Remove and discard the O-ring from the filter cover.
S 024-007
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