S 795-021-N00
(10) Do the test for the fuel filter differential pressure switch that is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).
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73-34-00
ALL ú ú N02 Page 509 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FUEL FILTER DIFFERENTIAL PRESSURE SWITCH - REMOVAL/INSTALLATION
_______________________________________________________________
1. General
_______
A. This procedure gives the instructions to remove and install the
differential pressure switch, S1585, for the fuel filter.
B. The differential pressure switch is installed at the top of the fuel
filter housing of the fuel pump. The fuel pump is installed to the
forward face of the main gearbox at the 5 o'clock position.
C. You can get access to the differential pressure switch through the right
thrust reverser.
TASK 73-34-01-004-001-N00
2. Remove the Fuel Filter Differential Pressure Switch (Fig. 401)
___________________________________________________
A. Standard Tools and Equipment
(1)
Container - 5 gallon (20 liter) capacity, used
to catch the fuel
B.
Consumable Materials
(1)
D00390 Oil - Engine
(2)
D00250 Petrolatum White, VV-P-236
C.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 71-11-04/201, Fan Cowl Panels
(3)
AMM 71-11-06/201, Core Cowl Panels
(4)
AMM 78-31-00/201, Thrust Reverser System
(5)
IPC 73-11-02 Fig. 5
(6)
IPC 73-34-01 Fig. 5
(7)
WDM 73-34-12
(8)
SSM 73-34-02
D.
Access
(1)
Location Zone
412 Engine 1 - Main Gearbox Fwd Face 5 o'clock
422 Engine 2 - Main Gearbox Fwd Face 5 o'clock
432 Engine 3 - Main Gearbox Fwd Face 5 o'clock
442 Engine 4 - Main Gearbox Fwd Face 5 o'clock
(2)
Access Panel
416 Right Thrust Reverser Half - Engine 1
426 Right Thrust Reverser Half - Engine 2
436 Right Thrust Reverser Half - Engine 3
446 Right Thrust Reverser Half - Engine 4
E.
Prepare to Remove the Differential Pressure Switch
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-003-N00
(2)
Make sure the applicable FUEL CONTROL switch is in the CUTOFF position.
(a)
Install the DO-NOT-CLOSE tag.
S 864-002-N00
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ALL ú ú N01 Page 401 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SEE A
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
MAIN FUEL SUPPLY HOSE FUEL FLOW (REF) TRANSMITTER
(REF)
EEC FUEL TEMPERATURE THERMOCOUPLE PROBE (REF)
PACKING
FUEL FILTER
HOUSING
B
PACKING
MAIN GEARBOX (REF)
FUEL FILTER
DIFFERENTIAL
PRESSURE SWITCH,
S1585
ELECTRICAL CONNECTOR, DS1585 FUEL FILTER HOUSING
FUEL FILTER DRAIN PLUG
A
BRACKET
BOLT FUEL FILTER DIFFERENTIAL PRESSURE SWITCH
SEE B
FWD
(2 LOCATIONS)
BOLT (2 LOCATIONS)
WASHER (2 LOCATIONS)
Fuel Filter Differential Pressure Switch Installation
Figure 401
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73-34-01
ALL ú ú N02 Page 402 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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