2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-12-29-611-001 Fill the Hydraulic Fluid Reservoir with a Hand Pump 12-12-29-611-002 Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 29-10-00-864-002 Depressurize the Yellow Hydraulic System R 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through the Ground Connector

 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
29-23-00-860-001 Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) 29-23-00-860-002 Connection of the Isolation Coupling of the Power
 Transfer Unit (PTU)
 31-60-00-860-001 EIS Start Procedure
 31-60-00-860-002 EIS Stop Procedure

 3. Job Set-up
__________
 Subtask 29-10-00-010-051
 A. Open the access door 198CB.
 Subtask 29-10-00-860-080
 B. Aircraft Maintenance Configuration
 CAUTION : DO NOT START OR DRY MOTOR THE ENGINES WITH A HYDRAULIC GROUND
_______ POWER SUPPLY CONNECTED TO THE AIRCRAFT. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE ENGINE PUMPS.
 (1)
 Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 (2)
 Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. TASK 31-60-00-860-001).

 (3)
 On the ECAM control panel on the center pedestal, push the HYD pushbutton switch (P/BSW). Make sure that the lower (system) display shows the HYD page.

R (4) Make sure that the ECAM does not show these warnings:
R - Low air pressure in the Yellow reservoir
R - Low fluid level in the Yellow reservoir.

 (5) Obey the subsequent caution:
 CAUTION : DO NOT CONNECT GROUND POWER SUPPLIES TO THE GREEN AND
_______ YELLOW HYDRAULIC SYSTEMS AT THE SAME TIME. THIS COULD CAUSE:
 -THE PTU TO OPERATE TOO FAST
 -DAMAGE TO THE PTU IF ONE GROUND POWER SUPPLY IS IN OPERATION AND THE OTHER IS IN THE BY-PASS MODE.

R  (6) If you will pressurize the Green hydraulic system at the same time 
R  with the Yellow hydraulic system through the PTU, the ECAM must not 
R  show these warnings: 
R  - Low air pressure in the Green reservoir 
R  - Low fluid level in the Green reservoir.
 (7) If necessary, pressurize the reservoirs (Ref. TASK 29-14-00-614-002).
 (8) If necessary, add fluid to the applicable reservoir (Ref. TASK 12-12-
29-611-001) or (Ref. TASK 12-12-29-611-002). 
R 
R  (9) If it is not necessary to pressurize the Green system at the same 
R  time with the Yellow system: 
R  NOTE : Usually the PTU automatically pressurizes the Yellow hydraulic____ 
R  system at the same time with the Green hydraulic system. If 
R  you pressurize the Yellow system only, then it is necessary to 
R  stop the operation of the PTU. 
R 
R  (a) On section 40VU of the overhead panel, push the PTU pushbutton 
R  switch. Make sure that the OFF legend comes on. 
R 
R  (b) Disconnect the PTU isolation coupling (Ref. TASK 29-23-00-860-
001). 
R  (10) Depressurize the reservoir of the Yellow hydraulic system (Ref. TASK 
R  29-14-00-614-001). 
R  (11) Connect the suction and delivery lines of the hydraulic ground 
R  power-supply to the aircraft ground connectors: 
R  - 3006GM suction
 - 3008GM delivery. 
R  (12) Pressurize the reservoir of the Yellow hydraulic system (Ref. TASK 
R  29-14-00-614-002).

 4. Procedure
_________

 Subtask 29-10-00-863-051
 A. Pressurization with the Hydraulic Ground Power Supply
 (1) Start the hydraulic ground power supply and pressurize the Yellow system to 3000 psi (206 bar).
 NOTE : If the PTU is not isolated obey the subsequent precautions to____ prevent damage to the PTU: - make sure that the air pressure in the Yellow and the Green reservoirs does not fall below 3 bar (43.5113 psi) - limit the flow of the ground hydraulic supply to max 119 l.min (31.4362 USgal.mn).
　
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