YELLOW AUXILIARY HYDRAULIC POWER (ELECTRIC/HAND PUMPS) - MAINTENANCE PRACTICES
______________________________________________________________________________ TASK 29-24-00-863-001 Pressurize the Yellow Hydraulic System with the Electric Pump WARNING : MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY
_______ OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM.
 WARNING : PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR
_______ THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER TO THE AIRCRAFT.
 1. Reason for the Job
__________________
 To pressurize the Yellow hydraulic system with the Yellow electric pump, for maintenance procedures.
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-12-29-611-001 Fill the Hydraulic Fluid Reservoir with a Hand Pump 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through the Ground Connector 29-23-00-860-001 Disconnection of the Isolation Coupling of the Power
 Transfer Unit (PTU) 31-60-00-860-001 EIS Start Procedure 29-24-00-991-001 Fig. 201
 3. Job Set-up
__________ Subtask 29-24-00-860-052
 A. Aircraft Maintenance Configuration
 (1)
 Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).

 (2)
 Set the Electronic Centralized Aircraft Monitor (ECAM) to on (Ref. TASK 31-60-00-860-001).

 1EFF : ALL 1 29-24-00Page 201 1 1 Feb 01/99R 1 1 1CES 1

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

 (4)
 Make sure that the ECAM does not show any of these conditions:

 -
Low air pressure in the Yellow reservoir,

 -
Low fluid level in the reservoirs.

 (5)
 In addition, if you will operate the PTU, make sure that these conditions are also not shown on the ECAM:

 -
Low air pressure in the Green reservoir,

 -
Low fluid level in the Green reservoir.

 (6)
 If necessary, pressurize the reservoir(s) (Ref. TASK 29-14-00-614-002).

 (7)
 If necessary, add fluid to the reservoir(s) (Ref. TASK 12-12-29-611-001).

 Subtask 29-24-00-865-050
 B. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/HYD POWER/Y 3803GX N30 123VU Y HYD/ELEC/PUMP 3802GX AB06

R 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
 4. Procedure
_________
 (Ref. Fig. 201/TASK 29-24-00-991-001)
 Subtask 29-24-00-863-050
 A. Pressurization with the Electric Pump
 (1) If it is necessary to use the Yellow hydraulic system only, continue as follows:
 NOTE : Usually the PTU automatically pressurizes the Green hydraulic
____ system together with the Yellow hydraulic system. If you pressurize the Yellow system only,then it is necessary to stop the operation of the PTU.

 Indications and Controls of the Yellow Hydraulic System Figure 201/TASK 29-24-00-991-001
 1EFF : ALL 1 29-24-00Page 203 1 1 Feb 01/99R 1 1 1CES 1

 (a) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. TASK 29-23-00-860-001)
 NOTE : Disconnection of the isolation coupling is only necessary
____ if the system on the opposite side is disconnected for maintenance.
 (b)
 Press and release the PTU/AUTO pushbutton switch 1802GL on the overhead panel 40VU.

 (c)
 Make sure that the OFF legend comes on.

 (2)
 On the overhead panel 40VU, push and release the YELLOW ELEC PUMP pushbutton switch 3804GX.

 (3)
 Make sure that the ON legend comes on.

 (4)
 Make sure that the Yellow electric pump starts.

 (5)
 On the lower DU of the ECAM, make sure that the YELLOW hydraulic system has a pressure of approximately 3000 psi.

 NOTE : If the ECAM system is not available, you can check the
____ pressure of 3000 +/-100 psi on the Yellow power accumulator (3070GM).
　
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