(4)
Install the motor impeller
(5)
Remove the housing
(6)
Install the housing.
E.
The removal and installation procedures for the fuel boost pumps and fuel override pumps are almost the same.
F.
The procedure to remove and install the removal check valve is in AMM 28-22-08/401. The procedure to remove and install the discharge check valve is in AMM 28-22-09/401.
G.
The Insulation Resistance Check is not required for all fuel pumps. Fuelboost pumps 60B92404-5, -6 or -7, and fuel override pumps 60B89004-8, -10or -12 require the Insulation Resistance Check. Fuel boost pumps60B92404-8 and subsequent, or fuel override pumps 60B89004-14 andsubsequent do not require the Insulation Resistance Check.
TASK 28-22-03-024-092Remove the Fuel Boost Pump Assembly or the Fuel Override Pump Assembly
______________________________________________________________________ (Fig. 401)
A. References
(1) AMM 06-41-00/201, Fuselage (Major Zones 100 and 200) Access Doors and Panels
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28-22-03
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A
757 MAINTENANCE MANUAL
FUEL BOOST PUMP SEE A
FUEL BOOST PUMP SEE A
FUEL OVERRIDE
PUMP
FUEL BOOST PUMP
SEE A 3. SCREW
SEE A 4. WASHER
5. NUT
2. FLANGE (EXAMPLE)
1. PRESSURE COUPLING 6. PUMP DISCHARGE
SENSOR LINE LINE
SPAR (DRY SIDE)
9. DISCHARGE 31. NUT CHECK VALVE30. RING
29. O-RING 8. COOLANT AND VAPOR
DISCHARGE LINE LINE
28. PUMP INLET 9. FLEXIBLE FULL COUPLING
27. FLEXIBLE 10. BONDING JUMPER HALF COUPLING
26. REMOVAL 11. MOTOR IMPELLER
CHECK VALVE
25. SCREW
12. MOUNTING
24. WASHER
SCREW
23. NUT
(EXAMPLE)
22. COOLANT AND VAPOR DISCHARGE PORT
20. MOUNTING BOLT AND FLAPPER (EXAMPLE) 13. ELECTRICAL 19. BONDING 21. HOUSING
17. O-RING CONNECTORJUMPER
SEE B
14. BONDING CLIP
18. O-RING (EXAMPLE)
16. O-RING
15. DRAIN PLUG
FUEL BOOST PUMP (FUEL OVERRIDE PUMP IS ALMOST THE SAME)
A
Fuel Boost Pump Installation Figure 401 (Sheet 1)
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