DOC AIRBUS | AMM A320FServicing of the HP-Filter
TASK 29-12-45-610-001-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 29-12-45-865-050-A
Subtask 29-12-45-020-050-A
Subtask 29-12-45-860-051-A
[Rev.10 from 2021]
2026.04.02 06:46:31 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 | CONTAINER 3 L(3/4 USGAL) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 2 | WARNING NOTICE(S) |
| ALT29000001 | 1 | HYD GRND PWR UNIT3000 |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 195 | HYDRAULIC COMPT AND FAIRINGS |
| 195BB |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 2 | FILTER ELEMENT | AIPC 29-12-45-01-020 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 29-00-00-864-001-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 29-10-00-863-003-A | Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-863-003-A-01 | Pressurize the Blue Hydraulic System with the Blue Electric Pump |
| TASK 29-10-00-864-003-A | Depressurize the Blue 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) |
High Pressure FilterSubtask 29-12-45-865-050-A
A. Open, safety and tag this(these) circuit breaker(s):
Subtask 29-12-45-941-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | HYD/HYD PWR/B WARN/& CTL | 2702GJ | C12 |
| 123VU | B HYD/ELEC PUMP | 2701GJ | AB09 |
B. Put WARNING NOTICE(S) in position to tell persons not to pressurize the Blue hydraulic system:
Subtask 29-12-45-010-051-A Subtask 29-12-45-860-052-A - In the cockpit on the hydraulic section 40VU of the overhead panel
- On the ground service panel of the Blue hydraulic system.
D. Aircraft Maintenance Configuration
(2) Make sure that the Blue 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 Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(4) Put a 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 Blue 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 Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(4) Put a CONTAINER 3 L(3/4 USGAL) below the filter to collect any hydraulic fluid.
Subtask 29-12-45-020-050-A
A. Removal of the Filter Element
(2) Remove the filter bowl (3) together with the filter element (2).
(3) Remove and discard the filter element (2) from the filter bowl (3).
(4) If the filter element (2) stay in the filter head (1), pull it out.
Subtask 29-12-45-560-050-A WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(1) Cut, remove and discard 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 and discard the filter element (2) from the filter bowl (3).
(4) If the filter element (2) stay in the filter head (1), pull it out.
B. Preparation for Installation
(1) Make sure the O-ring (5) is installed correctly.
(a) Lubricate the O-ring (5) of the new AIPC 29-12-45-01-020 FILTER ELEMENT (2) with the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(b) Lubricate the thread of the filter bowl (3) with the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(3) If the red clogging indicator (4) is out, push it in to set it again.
Subtask 29-12-45-420-050-A (1) Make sure the O-ring (5) is installed correctly.
NOTE: The O-ring (5) is part of the filter element (2).
(2) Lubricate components: (a) Lubricate the O-ring (5) of the new AIPC 29-12-45-01-020 FILTER ELEMENT (2) with the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(b) Lubricate the thread of the filter bowl (3) with the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(3) 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) with the filter head (1) and tighten it with your hands.
(6) If it is not possible to tighten the filter bowl (3), caught pressure upstream of the filter bowl may be the cause:
(a) Connect a ALT29000001 HYD GRND PWR UNIT3000 to the aircraft connectors 2006GM and 2008GM to release this pressure.
(b) Tighten the filter bowl (3) with your hands.
(c) Disconnect the hydraulic ground power-supply.
Subtask 29-12-45-942-050-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) with the filter head (1) and tighten it with your hands.
(6) If it is not possible to tighten the filter bowl (3), caught pressure upstream of the filter bowl may be the cause:
(a) Connect a ALT29000001 HYD GRND PWR UNIT3000 to the aircraft connectors 2006GM and 2008GM to release this pressure.
(b) Tighten the filter bowl (3) with your hands.
(c) Disconnect the hydraulic ground power-supply.
D. Remove the WARNING NOTICE(S).
Subtask 29-12-45-865-051-A E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 29-12-45-790-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | HYD/HYD PWR/B WARN/& CTL | 2702GJ | C12 |
| 123VU | B HYD/ELEC PUMP | 2701GJ | AB09 |
F. Test of the Filter Assembly
(1) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
(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 Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
5. Close-up(1) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
(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 Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
Subtask 29-12-45-860-051-A
A. Put the aircraft back to the serviceable condition.
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(2) Make sure that the fluid level in the Blue reservoir is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
(3) Remove the CONTAINER 3 L(3/4 USGAL) from below the filter.
(4) Make sure that the work area is clean and clear of tools and other items.
Subtask 29-12-45-410-051-A WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(1) Safety the filter bowl (3) to the filter head (1) with (2) Make sure that the fluid level in the Blue reservoir is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
(3) Remove the CONTAINER 3 L(3/4 USGAL) from below the filter.
(4) Make sure that the work area is clean and clear of tools and other items.