Removal of the Engine Pump

TASK 29-13-51-000-809-A
Removal of the Engine Pump

WARNING: MAKE SURE THAT THE HYDRAULIC PUMP IS SUFFICIENTLY SUPPORTED DURING REMOVAL OR INSTALLATION. THE HYDRAULIC PUMP WEIGHS APPROXIMATELY 35 LBS (13 KG). IF IT IS NOT SUFFICIENTLY SUPPORTED, INJURY TO PERSONNEL AND/OR DAMAGE TO THE COMPONENTS CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

ZONE: 440
FIN: 3030GD

1. Reason for the Job
The weight of the engine pump is approximately 13 kg (35 lbs). Two persons are necessary to do this task.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	AR	CAP - PROTECTION
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	1	COVER - PROTECTION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - STANDARD

B. Consumable Materials

REFERENCE	DESIGNATION
No specific	Tie wrap

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
440	ENG 2 AIR INTAKE, FAN AND ACCESS GEARBOX
195BB, 198CB
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-36-29-170-002-A	Flushing of the Yellow Hydraulic System of the Engine Driven Pump (EDP)
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 29-00-00-280-005-A	Check of the Green, Yellow or Blue Hydraulic System after Operation in an Overheat Condition
TASK 29-00-00-280-006-A	Check of the Green or Yellow Hydraulic System after Engine Pump Failure or Operation in a Possible Cavitation Condition - with Ground Cart Available
TASK 29-00-00-280-006-A-01	Check of the Green or Yellow Hydraulic System after Engine Pump Failure or Operation in a Possible Cavitation Condition - Ground Cart not Available
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
Engine Pump

3. Job Set-up
Subtask 29-13-51-861-053-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 29-13-51-860-084-A

B. Aircraft Maintenance Configuration
(1) Do the system check applicable after pump damage (Ref. AMM TASK 29-00-00-280-006), if you remove the pump:

Because of operation without fluid (dry running)
Or because of malfunction if you think that there is a pump internal damage.

(2) If there is pump damage and an overheat condition, do also the system check applicable after overheat condition (Ref. AMM TASK 29-00-00-280-005).
(3) Do a visual check of the related Yellow HP filter element (3048GM):

If you find metal chips or decomposed hydraulic fluid (jelly) in the filter element, flush the lines that connect the pump to the filters (Ref. AMM TASK 12-36-29-170-002)
If you find contamination on the filters, flush the lines that connect the pump to the filters (Ref. AMM TASK 12-36-29-170-002).

(4) Make sure that the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-10-00-864-002)
(5) Depressurize the reservoir of the Yellow hydraulic system.
(Ref. AMM TASK 29-14-00-614-001)
(6) On the ECAM control panel, push the HYD key:

On the lower ECAM DU, the HYD page comes into view.

(7) On the overhead panel 20VU:

Lift the guard and release the ENG2/FIRE pushbutton switch.

(8) On the lower ECAM DU:

On the HYD page, make sure that the fire shut-off valve (3046GD) is closed.

Subtask 29-13-51-941-072-A

C. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
Put a WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.

(2) Open access door 198CB.
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system on the ground service panel.
(3) On HYD section of panel 40VU:

Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system.

(4) Open access door 195BB:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Yellow hydraulic system.
(5) On the center pedestal, on ENG panel 115VU:

Make sure that the ENG/MODE selector switch is in the NORM position.
Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.

(6) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 29-13-51-865-082-A

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYDRAULIC/Y HYD/PUMP ENG2 ALT	3710GD	E12
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36

Subtask 29-13-51-010-068-A

E. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

4. Procedure
Subtask 29-13-51-020-064-B

A. Removal of the Engine Pump
(1) Put a CONTAINER 5 L (1.32 USGAL) in position below the engine pump (1).
(2) Disconnect the electrical harness connector (2) from the engine pump (1).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Attach the electrical harness connector (2) to a surrounding part with a Tie wrap.
(5) Disconnection of the case drain hose (3) from the engine pump (1):
(a) Remove the case drain hose (3) from the union (4).
1 Use a second WRENCH - STANDARD to hold the union (4) when you loosen the coupling nut.
(b) Drain the hydraulic fluid into the container.
(6) Disconnection of the suction hose (7) from the engine pump (1):
(a) Remove the suction hose (7) from the union (8).
1 Use a second WRENCH - STANDARD to hold the union (8) when you loosen the coupling nut.
(b) Drain the hydraulic fluid into the container.
(7) Disconnection of the pressure hose (11) from the inline damper (12):
(a) Remove the pressure hose (11) from the inline damper (12).
1 Use a second WRENCH - STANDARD to hold the inline damper (12) when you loosen the coupling nut.
(b) Drain the hydraulic fluid into the container.
(8) Removal of the engine pump (1):
(a) Remove the four nuts (15) and four washers (16) that attaches the engine pump (1) to the Accessory Gearbox (AGB) (19).
(b) Remove the engine pump (1) from the AGB (19).
(c) Remove and discard the gasket (17) from the mount pad of the engine pump (1).
(d) Remove and discard the packing (18) from the splined shaft of the AGB (19).
(9) If the new engine pump (1) does not have the unions (4), (8) and the inline damper (12) installed, do these steps:
(a) Remove the union (4).
(b) Remove and discard the packing (6).
(c) Remove the union (8).
(d) Remove and discard the packing (10).
(e) Remove the inline damper (12).
(f) Remove and discard the retainers (14).
(g) Remove and discard the packings (20) and (21).
(10) Install COVER - PROTECTION and CAP - PROTECTION on all open ports, open tubes, open hoses and connectors.

[Rev.10 from 2021] 2026.04.01 00:23:46 UTC