29-11-05
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747-400 MAINTENANCE MANUAL
 (4)  S 862-053Open the applicable EDP DEPRESS circuit breaker: (a) P7 Overhead Circuit Breaker Panel 1) 7J2 EDP DEPRESS 1 2) 7H2 EDP DEPRESS 2 3) 7G2 EDP DEPRESS 3 4) 7F2 EDP DEPRESS 4
 (5)  S 012-054Open the thrust reverser half on the right side of the engine (AMM 78-31-00/201).
 (6)  S 022-057Remove the plug and seal assembly from the gearbox drive shaft: (a) Remove the the tab washer and the nut from the end of the bolt. (b) Remove the gearshaft bolt and the gearshaft plug.
 (7)  S 032-058Remove the plug assemblies from the supply hose, the outlet hose, and the case drain hose.
 (8)  S 032-060Remove the pump pad plug.
 (9)  S 432-061Connect the drain line for the pump pad.
 S 422-059

 (10)
 Install the EDP (AMM 29-11-05/401).

 S 412-062

 (11)
 Close the thrust reverser on the right side of the engine (AMM 78-31-00/201).

 S 862-064

 (12)
 Remove electrical power, if it is not necessary (AMM 24-22-00/201).

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 29-11-05
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747-400 MAINTENANCE MANUAL
 ENGINE-DRIVEN HYDRAULIC PUMP - REMOVAL/INSTALLATION
___________________________________________________
 1.  General_______
 A.  This procedure contains the tasks remove and install the engine-driven pump (EDP). The installation task also contains a test of the EDP installation.
 B.  The EDP installation is the same on each engine.
 C.  You can get access to the EDP through the thrust reverser half on the right side of the engine.
 D.  If you replace an engine-driven pump for one of the conditions which follow, refer to AMM 29-11-00/201 for the procedure which is necessary to flush the hydraulic system or replace the filters.
 (1)
Mechanical failure

 (2)
Leakage at the shaft seal or the housing seal.

 (3)
The EDP became too hot.

 TASK 29-11-05-004-001
 2.  Engine-Driven Pump (EDP) Removal (Fig. 401)________________________________
 A.  Standard Tools and Equipment
 (1)
Container - 1 U.S. (4 Liter) capacity, for hydraulic fluid

 B.  
References

 (1)
AMM 24-22-00/201, Manual Control

 (2)
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)
AMM 36-00-00/201, Pneumatic System

 (4)
AMM 71-11-06/201, Core Cowl Panels

 (5)
AMM 78-31-00/201, Thrust Reverser System

 (6)
IPC 29-11-05 Fig. 2

 C.  
Access

 (1)  
Location Zone 412 Engine 1 - Gearbox Forward Face 5:00 o'clock 422 Engine 2 - Gearbox Forward Face 5:00 o'clock 432 Engine 3 - Gearbox Forward Face 5:00 o'clock 442 Engine 4 - Gearbox Forward Face 5:00 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

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747-400
MAINTENANCE MANUAL

2.  NUT (4 LOCATIONS)
4. GASKET
SEE  A 
3. PACKING 
FWD  B  PAD MOUNTING PUMP 
SUPPLY HOSE 
PRESSURE HOSE  CASE DRAIN HOSE 
C  C 
B  B 
DV349 CONNECTOR ELECTRICAL 
　
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