DOC AIRBUS | AMM A320FInstallation of the Hydraulic Tubes
TASK 20-23-11-911-001-A
Installation of the Hydraulic Tubes
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 20-23-11-860-051-A
Subtask 20-23-11-420-051-A
Subtask 20-23-11-860-060-A
[Rev.10 from 2021]
2026.03.31 22:59:18 UTC
Installation of the Hydraulic Tubes
WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobNOTE: If a tube made of titanium (TI 3Al 2.5V) (ABS5004) is not available, you can use a tube made of corrosion resistant steel (21.6.9) (ASNA3288). It is important to record the weight penalty.
NOTE: When you move the tubes to the work station, you must obey the necessary precautions to prevent deterioration.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CLOTH-EMERY (GRADE 320) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.03FAB1) | Mineral Oil base Grease-- Vaseline or Petrolatum - |
| (Material No.03LDA1) | Grease-Hydraulic Systems - - |
| (Material No.06CMD9) | Silicone Adhesive Sealant-General Purpose One part legacy |
| (Material No.14RAD1) | Cord-- Synthetic fiber Dia: 2.5 mm - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 12-12-29-611-002-A | Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart |
| TASK 20-21-12-911-001-A | Tightening Torques for Pipe Unions (not for OXYGEN Unions) |
| TASK 20-23-14-910-001-A | Protection of Hydraulic Lines from Vibration and Chafing |
| TASK 20-23-22-910-001-A | Marking of the Unions after Application of Standard or Specific Tightening Torque |
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-870-001-A | Bleeding Procedure of the Green Hydraulic System Upstream of the Engine Pump |
| TASK 29-00-00-870-002-A | Bleeding Procedure of the Green Hydraulic System Upstream of the PTU |
| TASK 29-00-00-870-003-A | Bleeding Procedure of the Green Hydraulic System Downstream of the Engine Pump |
| TASK 29-00-00-870-004-A | Bleeding Procedure of the Yellow Hydraulic System Upstream of the Engine Pump |
| TASK 29-00-00-870-005-A | Bleeding Procedure of the Yellow Hydraulic System Upstream of the PTU |
| TASK 29-00-00-870-006-A | Bleeding Procedure of the Yellow Hydraulic System Upstream of the Yellow E-Pump |
| TASK 29-00-00-870-007-A | Bleeding Procedure of the Yellow Hydraulic System Downstream of the Engine Pump |
| TASK 29-00-00-870-008-A | Bleeding Procedure of the Blue Hydraulic System Upstream of the Blue E-Pump |
| TASK 29-00-00-870-009-A | Bleeding Procedure of the Blue Hydraulic System Downstream of the Blue E-Pump |
| 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 29-10-00-863-002-A | Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart |
| 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 29-14-00-614-001-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 29-23-00-863-001-A | Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump |
| TASK 29-23-00-863-002-A | Pressurize the Yellow Hydraulic System from the Green Hydraulic System through the PTU with the Ground Service Cart |
| TASK 32-42-00-870-001-A | Bleeding of the Normal Braking at the Brake Units |
| TASK 32-43-00-612-001-A | Filling and Bleeding of the Low Pressure Control System of the Alternate Braking |
| TASK 32-43-00-612-001-A-01 | Filling and Bleeding of the Low Pressure Control System of the Alternate Braking using Green Reservoir fluid |
| TASK 32-43-00-870-002-A | Bleeding of the High Pressure Alternate Braking System |
Minimum Clearance of the Hydraulic TubesSubtask 20-23-11-860-051-A
A. Aircraft Maintenance Configuration
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the related hydraulic system is depressurized (Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the related hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
4. Procedure(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the related hydraulic system is depressurized (Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the related hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
Subtask 20-23-11-420-051-A
A. Installation of the Line Support Blocks
(1) Remove the protective layer from the structure at the locations of the line support blocks with CLOTH-EMERY (GRADE 320).
(2) Apply a thin layer of Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) on the structure at the locations of the line support blocks.
(3) Make sure that the line support blocks are fully clean. Install the line support blocks.
(4) Make sure that the rubber linings of the line clamps are in good condition and correctly installed in the clamps.
Subtask 20-23-11-420-052-A (1) Remove the protective layer from the structure at the locations of the line support blocks with CLOTH-EMERY (GRADE 320).
(2) Apply a thin layer of Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) on the structure at the locations of the line support blocks.
(3) Make sure that the line support blocks are fully clean. Install the line support blocks.
(4) Make sure that the rubber linings of the line clamps are in good condition and correctly installed in the clamps.
B. Installation of the Tubing
(1) Make sure that all the equipment items that you must connect are in the correct position. This is to make sure that it will not be necessary to remove the tubing subsequently.
(2) Make sure that you flush the lines before the installation and that the threads of the fittings are in the correct condition.
(3) Make sure that the tubing ends, the sleeves and the unions are in the correct condition.
(5) Put the tubing in position.
(6) Make sure that there is a minimum distance between the tube and the parts that can or cannot move and the other tubes.
1 Wind a spiral strip NSA849000 around the tube.
2 Install a cable tie NSA935401 at each end of the spiral strip.
(b) If necessary, install lacing tape NSA8420 on the tube.
1 Attach the lines with lacing tape14RAD1 Cord-- Synthetic fiber Dia: 2.5 mm -
2 Complete the lacing with a reef knot. Tighten the knot.
3 Apply Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on the knot and the ends of the lacing tape.
(7) Make sure that the electrical bondings are correct (Ref. AMM TASK 20-28-00-912-802).
(8) TORQUE the connections to the applicable values (Ref. AMM TASK 20-21-12-911-001).
(9) Make sure that the pipe has protection from vibrations and chafing (Ref. AMM TASK 20-23-14-910-001).
(10) Make a mark on each union after you apply the standard or special tightening torque value (Ref. AMM TASK 20-23-22-910-001).
5. Close-up(1) Make sure that all the equipment items that you must connect are in the correct position. This is to make sure that it will not be necessary to remove the tubing subsequently.
(2) Make sure that you flush the lines before the installation and that the threads of the fittings are in the correct condition.
(3) Make sure that the tubing ends, the sleeves and the unions are in the correct condition.
NOTE: It is necessary to discard tubes that have indentations with a depth of more than 0.05 mm (0.0020 in.). Two causes are possible for these indentations:
(4) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) or Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) or Grease-Hydraulic Systems - - (Material No.03LDA1) to the threads of the fitting of the hydraulic line. - A torque value that was too high during the installation,
- Too many installations and removals.
(5) Put the tubing in position.
(6) Make sure that there is a minimum distance between the tube and the parts that can or cannot move and the other tubes.
- If you cannot get the standard minimum distance, refer to the maintenance procedure or the installation drawing of the equipment to know if a specified minimum distance is applicable. It is necessary to obey this specified minimum distance.
NOTE: To measure the minimum distance between a tube and a part that can move, it is necessary to measure the distance in a condition where the movement decreases the distance to its smallest value.
(a) If necessary, install a spiral strip. 1 Wind a spiral strip NSA849000 around the tube.
2 Install a cable tie NSA935401 at each end of the spiral strip.
(b) If necessary, install lacing tape NSA8420 on the tube.
1 Attach the lines with lacing tape
2 Complete the lacing with a reef knot. Tighten the knot.
3 Apply Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on the knot and the ends of the lacing tape.
(7) Make sure that the electrical bondings are correct (Ref. AMM TASK 20-28-00-912-802).
(8) TORQUE the connections to the applicable values (Ref. AMM TASK 20-21-12-911-001).
(9) Make sure that the pipe has protection from vibrations and chafing (Ref. AMM TASK 20-23-14-910-001).
(10) Make a mark on each union after you apply the standard or special tightening torque value (Ref. AMM TASK 20-23-22-910-001).
Subtask 20-23-11-860-060-A
A. Put the Aircraft back to its Initial Configuration
(1) Pressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
(2) If necessary, fill the hydraulic reservoirs:
(5) Bleed the related hydraulic system:
(a) For the Green system:
(e) For the alternate braking system:
(1) Pressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
(2) If necessary, fill the hydraulic reservoirs:
- With a hand pump (Ref. AMM TASK 12-12-29-611-001) or
- With a hydraulic cart (Ref. AMM TASK 12-12-29-611-002).
- For the Green system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001)
- For the Yellow system (Ref. AMM TASK 29-10-00-863-002) or (Ref. AMM TASK 29-23-00-863-002)
- For the Blue system (Ref. AMM TASK 29-10-00-863-003).
(5) Bleed the related hydraulic system:
(a) For the Green system:
- Upstream of the engine pump (Ref. AMM TASK 29-00-00-870-001)
- Upstream of the PTU (Ref. AMM TASK 29-00-00-870-002)
- Downstream of the engine pump (Ref. AMM TASK 29-00-00-870-003).
- Upstream of the engine pump (Ref. AMM TASK 29-00-00-870-004)
- Upstream of the PTU (Ref. AMM TASK 29-00-00-870-005)
- Upstream of the Yellow E-pump (Ref. AMM TASK 29-00-00-870-006)
- Downstream of the engine pump (Ref. AMM TASK 29-00-00-870-007).
- Upstream of the Blue E-pump (Ref. AMM TASK 29-00-00-870-008)
- Downstream of the Blue E-pump (Ref. AMM TASK 29-00-00-870-009).
(e) For the alternate braking system:
- Low pressure (if installed) (Ref. AMM TASK 32-43-00-612-001)
- High pressure (Ref. AMM TASK 32-43-00-870-002).