W DOC AIRBUS | AMM A320F

Removal of the Brake Selector Valve

TASK 32-42-11-000-001-A
Removal of the Brake Selector Valve

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES. WORK ON THE HYDRAULIC SYSTEMS CAN BE DANGEROUS.
FIN: 23GG
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
ACCESS PLATFORM 2M (6 FT)
No specific
AR
CAP - BLANKING
No specific
1
CONTAINER - HYDRAULIC FLUID RESISTANT
No specific
AR
PLUG - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Consumable Materials
REFERENCE
DESIGNATION
No specific
corrosion resistant steel lockwire 0.6 mm (0.024 in.)
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 20-23-21-911-001-A
Removal/Installation of the Bobbins from their Housings and Installation of O-rings, Square Seals, and Back-up Rings on the Bobbins
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 29-00-00-910-002-A
Safety Procedures of the Hydraulic System
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 29-23-00-860-001-A
Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-00-00-860-001-A
Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01
Flight Configuration Precautions without Electrical Power
TASK 32-12-00-010-001-A
Open the Main Gear Doors for Access
F Brake Selector Valve 23GG
3. Job Set-up
Subtask 32-42-11-860-050-A
A. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)
   (2) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
   (3) Make sure that the parking brake is OFF.
   (4) Make sure that the brake accumulator is depressurized.
Subtask 32-42-11-010-050-A
B. Get Access
   (1) Open the left or the right MLG door (Ref. AMM TASK 32-12-00-010-001).
Subtask 32-42-11-869-051-A
C. Disconnection of the PTU Isolation Coupling
   (1) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
   (2) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
   (3) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
   (4) Put the ACCESS PLATFORM 2M (6 FT) in position.
   (5) Put the CONTAINER - HYDRAULIC FLUID RESISTANT below the brake selector valve (11) to collect the hydraulic fluid leakage.
Subtask 32-42-11-865-050-A
D. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUHYDRAULIC/G HYD/PUMP ENG1/CTL1701GKH12
** ON A/C NOT FOR ALL
121VUHYDRAULIC/G HYD/PUMP ENG1/CTL1701GKR35
** ON A/C NOT FOR ALL
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR34
** ON A/C ALL
121VUHYDRAULIC/BRAKING AND STEERING/SYS2/SPLY4GGM36
121VUHYDRAULIC/BRAKING AND STEERING/SYS2/CTL3GGM35
121VUHYDRAULIC/BRAKING AND STEERING/SYS1/CTL1GGM34
121VUHYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY2GGM33
** ON A/C NOT FOR ALL
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR33
Subtask 32-42-11-941-050-A
E. Safety Precautions
   (1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:
  • On the panel 40VU in the cockpit,
  • On the ground service panel of the Green hydraulic system.
4. Procedure
Subtask 32-42-11-020-051-B
A. Removal of the Brake Selector valve 23GG
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) Disconnect the electrical connector (10) from the brake selector valve (11).
   (3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
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.
   (4) Cut and discard the corrosion resistant steel lockwire 0.6 mm (0.024 in.) from the bolts (9).
   (5) Remove the bolts (9), the washers (8) and the bonding strap (7).
   (6) Carefully remove the brake selector valve (11) from the manifold assembly (1).
   (7) Remove and discard the packings (2) and the back-up rings (3) from the bobbins (4).
   (8) Put the PLUG-BLANKING in each disconnected line end.
   (9) If necessary, remove the bobbins (4) (Ref. AMM TASK 20-23-21-911-001). Remove and discard the seals (6) and the back-up rings (5).
   (10) Put the PLUG-BLANKING in each disconnected line end.
[Rev.10 from 2021] 2026.04.01 07:56:33 UTC
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