Fill the Hydraulic Fluid Reservoir with a Hand PumpFill the Hydraulic Fluid Reservoir with a Hydraulic Service CartTightening Torques for Pipes Unions (not for OXYGEN unions)Electrical Bonding of PipesPut the Related Hydraulic System in the Depressurized Configuration before Maintenance ActionBleeding Procedure of the Green Hydraulic System Upstream of the Engine Pump Bleeding Procedure of the Green Hydraulic System Upstream of the PTU Bleeding Procedure of the Green Hydraulic System Downstream of the Engine PumpBleeding Procedure of the Yellow Hydraulic System Upstream of the Engine Pump Bleeding Procedure of the Yellow Hydraulic System Upstream of the PTU Bleeding Procedure of the Yellow Hydraulic System Upstream of the Yellow E-Pump Bleeding Procedure of the Yellow Hydraulic System Downstream of the Engine PumpBleeding Procedure of the Blue Hydraulic System Upstream of the Blue E-Pump Bleeding Procedure of the Blue Hydraulic System Downstream of the Blue E-PumpSafety Procedures of the Hydraulic SystemPressurize the Green Hydraulic SystemPressurize the Yellow Hydraulic SystemPressurize the Blue Hydraulic System with a Ground Power SupplyDepressurization of the Hydraulic ReservoirsPressurization of the Hydraulic Reservoirs through the Ground ConnectorBleeding of the Normal Braking at the Brake Units Filling and bleeding of the Low Pressure Control System of the Alternate BrakingBleeding of the High Pressure Alternate Braking System

 3. Job Set-up
__________ Subtask 20-23-11-860-051
 A. Aircraft Maintenance Configuration
 (1)
 Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).

 (2)
 Make sure that the related hydraulic system is depressurized (Ref. TASK 29-00-00-864-001).

 (3)
 Make sure that the related hydraulic reservoir is depressurized (Ref. TASK 29-14-00-614-001).

 4. Procedure
_________ Subtask 20-23-11-420-051
 A. Installation of the Line Support Blocks
 (1)
 Remove the protective coating of the structure at the locations of the line support blocks with Grade No. 320 Emery Cloth. Apply a thin layer of COMMON GREASE (Material No. 04-012).

 (2)
 Make sure that the line support blocks are fully clean. Install the line support blocks.

 (3)
 Make sure that the rubber linings of the line clamps are:

 -in good condition,
 -correctly installed in the clamps. Subtask 20-23-11-420-052
 B. Installation of the Tubing
 (1) Precautions.
 (a) Make sure that:
 -you flush the lines before installation,
 -the threads of the fittings are in the correct condition. NOTE : Make sure that the flared ends of flared tubing are in the
____
 correct condition.

 Do not install tubes with flared ends that show signs of cracks, pitting, etc... You can install tubes that show signs of sleeve installation.
 1EFF : ALL 1 20-23-11Page 208 1 1 Aug 01/03R 1 1 1CES 1

 NOTE : Discard tubes that have indentations with a depth of more____ than 0.05 mm (0.0019 in.). Two causes are possible for these indentations: - a torque value that was too high during installation, - installation and removal too many times.
 (2) Lubrication.
 (a) You must: - apply HYDRAULIC FLUIDS (Material No. 02-003) to the threads of the fittings of the hydraulic lines, - put the seals fully in the same material before you install them, - apply COMMON GREASE (Material No. 04-004) to the O-rings of the air ducts when you install them.
 (3) Install the tube.
 (4) Make sure that the electrical bonds are correct (Ref. TASK 20-28-00-912-006).
 (5) TORQUE the connections to the applicable values (Ref. TASK 20-21-12-911-001). 
R  5. Close-up________ 
R  Subtask 20-23-11-860-060 
R  A. Put the aircraft back to its initial configuration. 
R  (1) Pressurize the hydraulic reservoirs (Ref. TASK 29-14-00-614-002). 
R R R  (2) If necessary, fill the hydraulic reservoirs: - with a hand pump (Ref. TASK 12-12-29-611-001) - or with a hydraulic cart (Ref. TASK 12-12-29-611-002) 
R R R R  (3) Pressurize the hydraulic systems: - for the Green system (Ref. TASK 29-10-00-863-001) - for the Yellow system (Ref. TASK 29-10-00-863-002) - for the Blue system (Ref. TASK 29-10-00-863-003). 
R  (4) Make sure that there is no leakage in the repaired area.

R  (5) Bleed the related hydraulic system: 
R  (a) For the Green system: 
R  - upstream of the engine pump (Ref. TASK 29-00-00-870-001) 
R  - upstream of the PTU (Ref. TASK 29-00-00-870-002) 
　
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