Fluid Separator
Figure 012
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HYDRAULIC RESERVOIR PRESSURIZING SYSTEM - MAINTENANCE PRACTICES
_______________________________________________________________
TASK 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs
1. Reason for the Job
__________________
To depressurize the hydraulic reservoirs for maintenance.
NOTE : You can depressurize each hydraulic reservoir independently.
____
NOTE : Two procedures are available to depressurize the hydraulic
____ reservoirs, one procedure uses ground equipment, the other does not. Do one of the two procedures.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s) 97A29102062000 2 CONNECTOR - DEPRESSURIZING, HYDRAULIC RESERVOIR
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
32-12-00-010-001 Open the Main Gear Doors for Access 29-14-00-991-001 Fig. 201
3. Job Set-up
__________ Subtask 29-14-00-010-050
A. Open the applicable access panels (doors):
For the Green hydraulic system
-197CB and the main landing gear doors (Ref. TASK 32-12-00-010-001). For the Blue hydraulic system
-197EB, 197FB
For the Yellow hydraulic system
-198CB, 196BB Subtask 29-14-00-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU HYD/HYD PWR/B WARN/& CTL 2702GJ C12 121VU HYDRAULIC/HYD POWER/Y 3803GX N30 123VU B HYD/ELEC PUMP 2701GJ AB09 123VU Y HYD/ELEC/PUMP 3802GX AB06
R 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
4. Procedure
_________
(Ref. Fig. 201/TASK 29-14-00-991-001)
Subtask 29-14-00-614-051
A. Depressurization with Ground Equipment
(1)
Put a container in position to collect any fluid which may come out of the depressurization valve.
(2)
Remove the depressurization valve-cap assembly from the depressurization valve and connect the CONNECTOR - DEPRESSURIZING, HYDRAULIC RESERVOIR (97A29102062000).
(3)
Listen to hear if all of the air has been released.
NOTE : Keep the depressurization equipment connected if it is
____ necessary to depressurize a reservoir for a maintenance operation. This prevents accidental pressurization of the reservoir. The depressurization equipment is removed when the maintenance operation is completed.
Subtask 29-14-00-614-053
B. Depressurization without Ground Equipment
WARNING : PROTECT YOUR HANDS AND FACE FROM THE GAS WHICH COMES OUT WHEN
_______ YOU OPEN THE MANUAL DEPRESSURIZATION VALVE OF THE RESERVOIRS. IT IS POSSIBLE THAT THE GAS IS HOT AND CONTAINS HYDRAULIC FLUID.
Location of Depressurization Components
Figure 201/TASK 29-14-00-991-001
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(1) On the applicable ground service panel, turn the cap assembly of the reservoir depressurization valve (1087GM, 2087GM or 3087GM) clockwise through 90 degrees.
(2) Listen to hear if all of the air is released.
(3) Make sure of this on the air pressure gage of the applicable reservoir.
NOTE : Keep the depressurization valve open if it is necessary to____ depressurize a reservoir during a maintenance operation. This prevents accidental pressurization of the reservoir. The depressurization valve is closed when the maintenance operation is completed.
5. Close-up________
Subtask 29-14-00-860-054
R R A. Close Access
R R R (1) Remove the CONNECTOR - DEPRESSURIZING, HYDRAULIC RESERVOIR and connect the depressurization valve-cap assembly to the depressurization valve.
R R (2) Turn the depressurization valve to its CLOSED position.
R (3) Remove the container from below the depressurization valve.
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