(2)
Leakage at the shaft or housing seal.
(3)
The EDP became too hot.
TASK 29-11-19-004-001
2. AC Motor-Driven Pump (ACMP) Removal (Fig. 401)___________________________________
A. Standard Tools and Equipment
(1)
Container - 1 U.S. Gallon (4 Liter) capacity
B.
References
(1)
AMM 12-25-01/301, Exterior Cleaning
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-11-00/201, Main Hydraulic Supply System
(4)
AMM 29-17-01/201, Reservoir Pressurization Module
(5)
AMM 36-00-00/201, Pneumatic System
(6)
AMM 54-62-00/201, Nacelle Strut Access Panels
(7)
IPC 29-11-19 Fig. 2
C.
Procedure
S 014-002
(1)
Open the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).
(2)
Supply electrical power (AMM 24-22-00/201).
S 864-003
S 864-004
WARNING: MAKE SURE YOU RELEASE THE PNEUMATIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. THE PNEUMATIC SYSTEM PRESSURIZES THE HYDRAULIC RESERVOIR. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
(3) Release the pressure in the pneumatic system (AMM 36-00-00/201).
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29-11-19
ALL ú ú 01 Page 401 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
1. PUMP (ACMP) AC MOTOR-DRIVEN CONNECTOR 2. ELECTRICAL
SEE A
19. SUPPLY HOSE 5. 4. 3. WASHER (QTY 2) THE GROUND BOLT HEAD AND BETWEEN THE (INSTALLED NUT STRAP) BOLT
6. GROUND STRAP
18. SELF-SEALING FITTING 20. WASHER (QTY 2) 7. BOLT (3 LOCATIONS) 21. NUT
UNION PACKING 15. CASE DRAIN HOSE 17. UNION SEE 16. PACKING B 10. SWIVEL ELBOW 12. PACKING 11. UNION SEE B 8. UNION 9. PACKING SEE B
14. PRESSURE HOSE
13. SWIVEL ELBOW FWD
A
(EXAMPLE) B
Figure 401 AC Motor-Driven Demand Pump Installation
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29-11-19
ALL ú ú 01 Page 402 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-005
WARNING: MAKE SURE YOU RELEASE THE HYDRAULIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
(4)
Release the pressure in the hydraulic system (AMM 29-11-00/201).
S 864-006
(5)
Operate the bleed valve on the reservoir pressurization module to release the pressure in the reservoir (AMM 29-17-01/201).
S 864-007
(6)
Open the 7H1 HYDRAULICS DEMAND 2 or 7G1 HYDRAULICS DEMAND 3 circuit breaker on P7 circuit breaker panel for the applicable system.
S 034-031
(7)
Disconnect the ACMP (1):
(a)
Disconnect the electrical connector (2) from the ACMP (1).
(b)
Inspect the electrical contacts on the connector, on the airplane side of the ACMP, for damage due to burning, If contacts appear burned or damaged, replace them.
(c)
Put the container below the ACMP (1) to catch the hydraulic fluid.
(d)
Disconnect these hoses from the ACMP (1):
CAUTION: DO NOT DISCONNECT THE SUPPLY HOSE BEFORE THE SELF-
_______ SEALING FITTING. IF YOU DISCONNECT THE SUPPLY HOSE BEFORE THE SELF-SEALING FITTING, THE RESERVOIR WILL DRAIN THROUGH THE SUPPLY HOSE.
1) The supply hose (19) between the self-sealing fitting (18) and the union (17) 2) The pressure hose (14) between the swivel elbow (13) and the union (11) 3) The case drain hose (15) between the swivel elbow (10) and the union (8).
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