W DOC AIRBUS | AMM A320F

Removal of the Yellow Engine Driven Pump

TASK 29-13-51-000-806-A
Removal of the Yellow Engine Driven Pump

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING: YOU MUST NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. THE HYDRAULIC FLUID IS POISONOUS AND CAN BE ABSORBED INTO YOUR BODY. IF YOU ACCIDENTALLY GET HYDRAULIC FLUID IN YOUR EYES, MOUTH OR ON YOUR SKIN, FLUSH WITH WATER AND GET MEDICAL AID.
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: OBEY THE HYDRAULIC SAFETY PROCEDURES.
CAUTION: HYDRAULIC FLUID CAN CAUSE DAMAGE TO EQUIPMENT. IF HYDRAULIC FLUID FALLS ON A SURFACE, IMMEDIATELY CLEAN THE SURFACE WITH A CLEAN CLOTH.
ZONE: 440
FIN: 3030GD ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
CONTAINER 1 L (1/4 USGAL)
No specific
AR
COVER - PROTECTION
No specific
1
PLIERS - JAWED, SOFT
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
No specific
1
WRENCH - STANDARD
 B. 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, ENG 2)
447AL, 448AR, 462AR
 C. 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 29-13-49-000-805-A
Removal of the Hydraulic Case Drain Tubes and Hoses
TASK 29-13-49-000-806-A
Removal of the Hydraulic Suction Hose
TASK 29-13-49-000-807-A
Removal of the Hydraulic Pressure Hose
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
TASK 71-00-00-860-833-A
Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A
Opening of the Fan Cowl Doors
TASK 71-51-40-000-801-A
Removal of the IDG-EDP-MON Harness
TASK 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A
Opening of the Thrust Reverser Cowl-Doors
F Hydraulic Pump ** ON A/C NOT FOR ALL
F Hydraulic Pump ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 29-13-51-861-052-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 29-13-51-860-077-A ** ON A/C NOT FOR ALL
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 a 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 shutoff valve (3046GD) is closed.
Subtask 29-13-51-941-067-A ** ON A/C NOT FOR ALL
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 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) On access door 195BB:
  • Put a WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Yellow hydraulic system.
   (5) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 29-13-51-865-079-A ** ON A/C NOT FOR ALL
D. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUHYDRAULIC/Y HYD/PUMP ENG2 ALT3710GDH02
** ON A/C NOT FOR ALL
49VUHYDRAULIC/Y HYD/PUMP ENG2 ALT3710GDE12
** ON A/C NOT FOR ALL
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
121VUHYDRAULIC/Y HYD/PUMP ENG2/CTL3701GDQ36
Subtask 29-13-51-010-058-A ** ON A/C NOT FOR ALL
E. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
     (a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
Subtask 29-13-51-040-053-A ** ON A/C NOT FOR ALL
F. Deactivation of the Thrust Reverser for Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 29-13-51-010-066-A ** ON A/C NOT FOR ALL
G. Get Access
   (1) Open the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
     (a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR.
4. Procedure
Subtask 29-13-51-020-059-B ** ON A/C NOT FOR ALL
A. Removal of the Yellow Engine Driven Pump
CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.
   (1) Put a CONTAINER 1 L (1/4 USGAL) below the hydraulic connections to collect the remaining fluid.
   (2) Remove the hydraulic pump (1).
CAUTION: USE TEFLON-JAWED PLIERS TO LOOSEN/TIGHTEN ELECTRICAL CONNECTORS. DO NOT USE METAL-JAWED PLIERS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE ELECTRICAL CONNECTORS CAN OCCUR.
     (a) Disconnect the IDG-EDP-MON harness (3030GD-A) from the hydraulic pump (1) with PLIERS - JAWED, SOFT (Ref. AMM TASK 71-51-40-000-801).
     (b) Hold the hydraulic inline damper (3) on the hydraulic pump (1) with a WRENCH - STANDARD and disconnect the hydraulic pressure hose. Collect the hydraulic fluid in the CONTAINER 1 L (1/4 USGAL) (Ref. AMM TASK 29-13-49-000-807).
     (c) Hold the adapter (13) with a WRENCH - STANDARD and disconnect the hydraulic suction hose. Collect the hydraulic fluid in the CONTAINER 1 L (1/4 USGAL) (Ref. AMM TASK 29-13-49-000-806).
     (d) Hold the elbow (10) on the hydraulic pump (1) with a WRENCH - STANDARD and disconnect the hydraulic case drain hose. Collect the hydraulic fluid in the CONTAINER 1 L (1/4 USGAL) (Ref. AMM TASK 29-13-49-000-805).
     (e) Remove the hydraulic inline damper (16) from the hydraulic pump (1).
       1 Remove and discard the packings (2), (15) and two retainers (14) from the hydraulic inline damper (16).
     (f) Remove the adapter (13) from the union (4) on the hydraulic pump (1).
     (g) Remove the union (4) from the hydraulic pump (1).
       1 Remove and discard the packing (5) from the union (4).
     (h) Remove the two elbows (9) and (10), adapter (8) and reducer (7) from the hydraulic pump (1).
       1 Remove and discard the packing (6) from the reducer (7).
   (3) Loosen the four nuts (12) that attach the hydraulic pump (1) to the Accessory Gearbox (AGB).
     (a) Turn the hydraulic pump (1) clockwise until the nuts (12) are in the large holes.
     (b) Remove the hydraulic pump (1) from the AGB.
     (c) Remove and discard the packing (17) from the hydraulic pump (1).
     (d) Remove the four nuts (12).
     (e) Remove and discard the gasket (11).
   (4) Installation of protection covers
CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
     (a) Install COVER - PROTECTION on the IDG-EDP-MON harness (3030GD-A) connector, pressure hose, suction hose, case drain hose and the hydraulic pump (1).
Subtask 29-13-51-020-059-C ** ON A/C NOT FOR ALL
A. Removal of the Yellow Engine Driven Pump
CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.
   (1) Put a CONTAINER 1 L (1/4 USGAL) below the hydraulic connections to collect the remaining fluid.
   (2) Remove the hydraulic pump (1):
CAUTION: USE TEFLON-JAWED PLIERS TO LOOSEN/TIGHTEN ELECTRICAL CONNECTORS. DO NOT USE METAL-JAWED PLIERS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE ELECTRICAL CONNECTORS CAN OCCUR.
     (a) Disconnect the IDDG-EDP-MON harness (3030GD-A) from the hydraulic pump (1) with the PLIERS - JAWED, SOFT (Ref. AMM TASK 71-51-40-000-801).
     (b) Hold the hydraulic inline damper (16) on the hydraulic pump (1) with a WRENCH - STANDARD and disconnect the hydraulic pressure hose. Collect the hydraulic fluid in the CONTAINER 1 L (1/4 USGAL) (Ref. AMM TASK 29-13-49-000-807).
     (c) Hold the union (4) on the hydraulic pump (1) with a WRENCH - STANDARD and disconnect the hydraulic suction hose. Collect the hydraulic fluid in the CONTAINER 1 L (1/4 USGAL) (Ref. AMM TASK 29-13-49-000-806).
     (d) Hold the elbow (10) on the hydraulic pump (1) with a WRENCH - STANDARD and disconnect the hydraulic case drain hose. Collect the hydraulic fluid in the CONTAINER 1 L (1/4 USGAL) (Ref. AMM TASK 29-13-49-000-805).
     (e) Remove the hydraulic inline damper (16) from the hydraulic pump (1).
       1 Remove and discard the packing (2), (15), and two retainer packings (14) from the hydraulic inline damper (16).
     (f) Remove the two elbows (9) and (10), the adapter (8), and the reducer (7) from the hydraulic pump (1).
       1 Remove and discard the packing (6) from the reducer (7).
   (3) Loosen the four nuts (12) that attach the hydraulic pump (1) to the Accessory Gearbox (AGB):
     (a) Turn the hydraulic pump (1) clockwise until the nuts (12) are in the large holes.
     (b) Remove the hydraulic pump (1) from the AGB.
     (c) Remove and discard the packing (17) from the hydraulic pump (1).
     (d) Remove the four nuts (12).
     (e) Remove and discard the gasket (11).
   (4) Installation of protection covers:
CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
     (a) Install COVER - PROTECTION on the IDG-EDP-MON harness (3030GD-A) connectors, pressure hose, suction hose, case drain hose and hydraulic pump (1).
[Rev.10 from 2021] 2026.04.01 00:23:40 UTC
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