DOC AIRBUS | AMM A320FRemoval of the Brake Hydraulic Self-Sealing Coupling
TASK 32-42-27-000-004-A
Removal of the Brake Hydraulic Self-Sealing Coupling
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 32-42-27-941-070-A ** ON A/C NOT FOR ALL
Subtask 32-42-27-020-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:48:00 UTC
Removal of the Brake Hydraulic Self-Sealing Coupling
WARNING:
LET THE BRAKES AND THE WHEELS BECOME COOL BEFORE YOU GO NEAR THE LANDING GEAR. DO NOT APPLY A LIQUID OR GAS DIRECTLY ON A HOT WHEEL OR BRAKE UNIT. THIS CAN CAUSE A TIRE EXPLOSION AND/OR A WHEEL RIM BURST.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CAP - BLANKING |
| No specific | AR | COVER - PROTECTION |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08BBD1) | Non Aqueous Cleaner-- Isopropyl Alcohol - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| 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 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
Brake Hydraulic-Self Sealing CouplingSubtask 32-42-27-941-070-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green and Yellow hydraulic systems:
Subtask 32-42-27-860-073-A ** ON A/C NOT FOR ALL (1) Put the SAFETY BARRIER(S) in position.
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green and Yellow hydraulic systems:
- On the hydraulic ground service panels
- In the cockpit, on hydraulic section 40VU of the overhead panel.
B. Aircraft Maintenance Configuration
(1) Put the wheel chocks in position.
(2) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002)
(3) On panel 110VU, set the PARK BRK control switch to OFF.
(4) In the cockpit:
(6) Operate the manual depressurization pushbutton of the relief-valve (3067 GM) to release the accumulator hydraulic pressure.
Subtask 32-42-27-865-065-A ** ON A/C NOT FOR ALL (1) Put the wheel chocks in position.
(2) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002)
(3) On panel 110VU, set the PARK BRK control switch to OFF.
(4) In the cockpit:
- Put a WARNING NOTICE(S) to tell persons not to operate the brake pedals
- On panel 110VU, put a WARNING NOTICE(S) on the PARK BRK control switch (73GG) to tell persons not to operate the parking brake system.
(6) Operate the manual depressurization pushbutton of the relief-valve (3067 GM) to release the accumulator hydraulic pressure.
C. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | HYDRAULIC/PARK BRK/CTL/STBY | 71GG | N37 |
| 121VU | HYDRAULIC/PARK BRK/CTL/NORM | 70GG | N36 |
Subtask 32-42-27-020-054-A ** ON A/C NOT FOR ALL
A. Removal of the Brake Hydraulic Self-Sealing Coupling
(2) Install COVER - PROTECTION on the hydraulic line quick-disconnect (1).
(3) Cut, remove and discard the lockwire that attaches the brake hydraulic self-sealing coupling (2) to the brake hydraulic crown (4).
(4) Loosen the brake hydraulic self-sealing coupling (2) from the brake hydraulic crown (4).
(5) Remove and discard the preformed packing (3) from the brake hydraulic self-sealing coupling (2).
(6) Install a CAP - BLANKING on the related inlet port of the hydraulic crown (4).
(7) Clean the hydraulic crown with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) to remove the unwanted hydraulic fluid.
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) Disconnect the related hydraulic line quick-disconnect (1) from the brake hydraulic self-sealing coupling (2). (2) Install COVER - PROTECTION on the hydraulic line quick-disconnect (1).
(3) Cut, remove and discard the lockwire that attaches the brake hydraulic self-sealing coupling (2) to the brake hydraulic crown (4).
(4) Loosen the brake hydraulic self-sealing coupling (2) from the brake hydraulic crown (4).
(5) Remove and discard the preformed packing (3) from the brake hydraulic self-sealing coupling (2).
(6) Install a CAP - BLANKING on the related inlet port of the hydraulic crown (4).
(7) Clean the hydraulic crown with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) to remove the unwanted hydraulic fluid.