(3)
Engine-driven pump (EDP) dispatch equipment removal.
(a)
This task removes the device which seals the gear shaft and the cover on the opening in the EDP pad. This task then installs an EDP which will operate.
(4)
Deactivated engine-driven pump (EDP) removal.
(a)
This task removes a deactivated EDP and the device which seals the gear shaft. This task then installs an EDP which will operate.
B.
Operation of an engine-driven hydraulic pump with restricted fluid supply can result in severe damage to the pump and associated hydraulic pressure lines in the engine strut. If the hydraulic pump operates more than 5 minutes when the shutoff valve is advertently closed, the pump can be damaged. If the pump is damaged, replace the pump (AMM 29-11-05/401).
C.
The hydraulic pump is on the engine gearbox. You can get access to the pump through the right thrust reverser half.
TASK 29-11-05-002-001
2. Engine-Driven Pump (EDP) Dispatch Equipment Installation (Fig. 201)
________________________________________________________
A. Special Tools and Equipment
(1)
G29005-1 - EDP Dispatch Equipment. This equipment contains these parts:
(a)
1 drive cover
(b)
1 plug for the case drain hose
(c)
1 outlet hose plug
(d)
1 inlet hose plug
(e)
1 pump pad plug
(f)
1 gasket
(g)
1 plug & seal assembly. This assembly contains these parts: 1) 1 large packing 2) 1 small packing 3) 1 gearbox bolt 4) 1 gearbox plug 5) 1 washer 6) 1 nut.
B.
Consumable Materials
(1)
D00071 Oil - Aircraft Turbine Engine Lubricating, MIL-L-7808 (optional to MIL-L-23699)
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A
747-400
MAINTENANCE MANUAL
SEE A
GASKET COVER DRIVE PAD
SEE B PLUG AND SEAL ASSEMBLY LOCKNUT (4 LOCATIONS)
EDP PAD
PUMP PAD PLUG A
NUT GEARBOX PLUG GEARBOX BOLT
WASHER B PLUG AND SEAL ASSEMBLY PACKING
Figure 201 Engine Driven Pump Deactivation
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C.
D.
E.
A
747-400
MAINTENANCE MANUAL
(2)
D00068 Oil - Aircraft Turbine Engine Lubricating, MIL-L-23699
(optional to MIL-L-7808)References
(1)
AMM 29-11-00/201, Hydraulic Power
(2)
AMM 29-11-05/401, Engine-Driven Pump
(3)
AMM 71-00-00/501, Power PlantAccess
(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
Procedure
S 012-035
(1)
Open the thrust reverser half on the right side of the engine (AMM 78-31-00/201).
S 032-002
(2)
Remove the EDP (AMM 29-11-05/401).
S 432-003
(3)
Install the plug and seal assembly:
(a)
If the plug and seal assembly is not assembled, assemble the plug and seal assembly: 1) Lubricate the packings with engine oil. 2) Install the small packing in the groove adjacent to the
head of the gearshaft bolt. 3) Install the large packing in the groove adjacent to the flange at the end of the gearbox plug.
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