CAUTION: DO NOT BREAK THE LOCKWIRE OR REMOVE THE RECEIVER MOUNTING BOLTS
_______ (SOCKET-HEAD BOLTS). THESE BOLTS ATTACH THE PUMP RECEIVER. IF YOU REMOVE OR LOOSEN THESE BOLTS, FUEL LEAKS CAN OCCUR BETWEEN THE RECEIVER SEAL AND THE SPAR WEB.
(7) Remove the hex-head bolts (5 and 9) and the washers (6) which attach the pump (7) to the receiver.
NOTE: Do not remove the bonding jumper (3) from the structure.
____
S 944-009
(8)
Put the container below the boost pump (7) before you remove the pump from the receiver.
S 024-010
(9)
Remove the pump from the receiver.
NOTE: Approximately 1 cup of fuel will leak when you remove the
____ pump.
S 024-029
(10)
Discard the packing (10).
S 034-011
(11)
Remove the pressure switch S435 (2) from the boost pump (7). Keep the switch for installation on the new pump.
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S 024-030
(12) Discard the packing (1).
TASK 28-25-01-404-012
3. APU Fuel Boost Pump Installation (Fig. 401)
________________________________
A. Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Packing | 28-25-01 | 02 | 60 | | | 2 | Pressure Switch | | | 55 | | | 5 | Bolt | | | 90 | | | 6 | Washer | | | 100 | | | 7 | Pwr Driven Rotary Pump (APU | | | 215, | | | | Boost Pump) | | | 245 | | | 9 | Bolt | | | 85 | | | 10 | Packing | | | 365 | 2......…........…...................................…..........…......…........1
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
SSM 28-25-01
(4)
WDM 28-25-11
(5)
SWPM 20-20-00, Electrical Bonds and Grounds
C.
Access
(1)
Location Zone 571 Rear Spar to Landing Gear Support Beam, Left
D.
Procedure
(1)
Put a new packing (1) on the pressure switch, S435 (2).
(2)
Install the pressure switch (2) on the pump (7).
S 434-013
S 434-031
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747-400
MAINTENANCE MANUAL
APU FUEL BOOST PUMP SEE A
PUMP
RECEIVER
RECEIVER
MOUNTING BOLT
(SOCKET HEAD, 3 LOCATIONS).
DO NOT REMOVE.
10. PACKING
6. WASHER (2 LOCATIONS)
9. BOLT (2 LOCATIONS)
FWD INBD
A
MOTOR MOUNTING
BOLT (3 LOCATIONS).
DO NOT REMOVE.
2. PRESSURE SWITCH1. PACKING S435
3.
BONDING JUMPER
4.
ELECTRICAL CONNECTOR DS435
5.
BOLT
6.
WASHER
8. ELECTRICAL CONNECTOR DM713
7. PUMP MOTOR M713
APU Fuel Boost Pump Installation
Figure 401
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747-400 MAINTENANCE MANUAL
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