DOC AIRBUS | AMM A320FServicing of the HP-Filter
TASK 29-11-45-610-001-A
Servicing of the HP-Filter
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 29-11-45-941-050-A
Subtask 29-11-45-020-050-A
Subtask 29-11-45-860-052-A
[Rev.10 from 2021]
2026.04.01 00:16:27 UTC
Servicing of the HP-Filter
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the Job- Replace the filter element.
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 3M (10 FT) |
| No specific | 1 | CONTAINER 3 L(3/4 USGAL) |
| No specific | 2 | WARNING NOTICE(S) |
| ALT29000001 | 1 | HYD GRND PWR UNIT3000 |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| No specific | lockwire 0.8 mm (0.032 in.) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 147 | MAIN GEAR WELL AND HYDRAULIC COMPARTMENT |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 2 | FILTER ELEMENT | AIPC 29-11-45-01-020 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| 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 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-10-00-863-001-A | Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-23-00-860-002-A | Connection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-23-00-863-001-A | Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump |
| TASK 29-23-00-864-001-A | Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
HP FilterSubtask 29-11-45-941-050-A
A. Put the WARNING NOTICE(S) in position to tell persons not the pressurize the Green hydraulic system:
Subtask 29-11-45-860-050-A - in the cockpit on the hydraulic section 40VU of the overhead panel,
- on the ground service panel of the Green hydraulic system.
B. Aircraft Maintenance Configuration
(2) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(4) Open one of the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).
(5) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(6) Put the ACCESS PLATFORM 3M (10 FT) in position.
(7) Put the CONTAINER 3 L(3/4 USGAL) below the filter to collect any hydraulic fluid.
4. ProcedureWARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002). (2) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(4) Open one of the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).
(5) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(6) Put the ACCESS PLATFORM 3M (10 FT) in position.
(7) Put the CONTAINER 3 L(3/4 USGAL) below the filter to collect any hydraulic fluid.
Subtask 29-11-45-020-050-A
A. Removal of the Filter Element
(1) Cut and remove the lockwire between the filter bowl (3) and the filter head (1).
(2) Remove the filter bowl (3) together with the filter element (2).
(3) Remove the filter element (2) from the filter bowl (3). Discard the filter element (2).
If you find metal particles in the filter element you must check the associated hydraulic system after operation of the engine pump in possible cavitation condition (Ref. AMM TASK 29-00-00-280-006).
Subtask 29-11-45-560-050-A (1) Cut and remove the lockwire between the filter bowl (3) and the filter head (1).
(2) Remove the filter bowl (3) together with the filter element (2).
(3) Remove the filter element (2) from the filter bowl (3). Discard the filter element (2).
NOTE: It is possible that the filter element (2) will stay in the filter head (1). If it does, pull it out.
(4) Examine the filter element in order to find the causes of contamination: If you find metal particles in the filter element you must check the associated hydraulic system after operation of the engine pump in possible cavitation condition (Ref. AMM TASK 29-00-00-280-006).
B. Preparation for Installation
(1) Do a check of the correct condition and installation of the O-ring (5).
(3) Lubricate the threads of the filter bowl (3) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(4) If the red clogging indicator (4) is out, push it in to set it again.
Subtask 29-11-45-420-050-A (1) Do a check of the correct condition and installation of the O-ring (5).
NOTE: The O-ring (5) is part of the filter element (2).
(2) Lubricate the O-ring (5) of the new AIPC 29-11-45-01-020 FILTER ELEMENT (2) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) . (3) Lubricate the threads of the filter bowl (3) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(4) If the red clogging indicator (4) is out, push it in to set it again.
C. Installation of the Filter Element
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Do a check of the filter element (2) and make sure that it is clean and not damaged.
(4) Install the new filter element (2), together with its O-ring (5) in the filter bowl (3).
(5) Engage the filter bowl (3) in the filter head (1) and tighten it with your hands.
Subtask 29-11-45-942-050-A (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Do a check of the filter element (2) and make sure that it is clean and not damaged.
(4) Install the new filter element (2), together with its O-ring (5) in the filter bowl (3).
(5) Engage the filter bowl (3) in the filter head (1) and tighten it with your hands.
NOTE: If it is not possible to tighten the filter bowl (3), caught pressure upstream of the filter bowl may be the cause. Connect a ALT29000001 HYD GRND PWR UNIT3000 to the aircraft connectors 1006GM and 1008GM to release this pressure.
D. Remove the WARNING NOTICE(S).
Subtask 29-11-45-790-050-A E. Test of the Filter Assembly
(1) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).
(3) Make sure that the clogging indicator stays in.
(4) Make sure that no hydraulic fluid comes out of the filter assembly.
(5) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).
5. Close-up(1) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).
(3) Make sure that the clogging indicator stays in.
(4) Make sure that no hydraulic fluid comes out of the filter assembly.
(5) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).
Subtask 29-11-45-860-052-A
A. Put the aircraft back to the serviceable condition.
(1) Safety the filter bowl (3) to the filter head (1) with lockwire 0.8 mm (0.032 in.).
(2) Make sure that the fluid level in the Green reservoir is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
(3) Remove the container from below the filter.
(4) Remove the access platform(s).
(5) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(6) Make sure that the work area is clean and clear of tools and other items.
(7) Close the main door of the main gear (Ref. AMM TASK 32-12-00-410-001).
(1) Safety the filter bowl (3) to the filter head (1) with lockwire 0.8 mm (0.032 in.).
(2) Make sure that the fluid level in the Green reservoir is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
(3) Remove the container from below the filter.
(4) Remove the access platform(s).
(5) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(6) Make sure that the work area is clean and clear of tools and other items.
(7) Close the main door of the main gear (Ref. AMM TASK 32-12-00-410-001).