(3)
Make sure that the warning notice(s) is (are) in position to tell persons not to pressurize the Yellow hydraulic system: - on the ground service panel 198CB.
(4)
Make sure that the warning notice(s) is (are) in position on the access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.
(5)
Make sure that an access platform is in position at the engine 1(2).
(6)
Make sure that the fan-cowl door is open.
(7)
Make sure that the door 195BB is open.
Subtask 29-13-38-941-052
B. Safety Precautions
(1)
On the center pedestal, on the ENG panel 115VU:
-make sure that the warning notice(s) is (are) in position to tell persons not to start the engine.
(2)
Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3)
Make sure that the warning notice(s) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:
-in the cockpit, on the HYD section of the overhead panel 40VU.
(4)
On the overhead maintenance panel 50VU:
-make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(5)
Make sure that the warning notice(s) is (are) in position to tell persons not to energize the FADEC 1(2).
(6)
Make sure that the container is below the fluid disconnect panel to collect the hydraulic fluid.
Subtask 29-13-38-865-051
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 3700GD Q37 121VU HYDRAULIC/Y HYD/PUMP ENG2/CTL 3701GD Q36
4. Procedure
_________
(Ref. Fig. 401/TASK 29-13-38-991-901) Subtask 29-13-38-420-052
A. Installation of the Engine 2 Pump Suction Self-Sealing Coupling
(1)
Remove the protective covers from the suction hose (5), the self-sealing coupling (15) and the union on the hydraulic pump (10).
(2)
Connect the self-sealing coupling (15) to the union on the hydraulic pump (10).
(3)
TORQUE the self-sealing coupling (15) to between 9.04 and 10.17 m.daN
(66.66 and 74.99 lbf.ft).
NOTE : Use a second wrench to hold the union on the hydraulic pump
____ when you TORQUE the self-sealing coupling (15).
(4)
Connect the suction hose (5) to the self-sealing coupling (15).
(5)
TORQUE the coupling nut on the suction hose (5) to between 10.73 and
12.99 m.daN (79.12 and 95.79 lbf.ft)
NOTE : Use a second wrench to hold the self-sealing coupling (15)
____ when you TORQUE the coupling nut on the suction hose.
(6)
Remove the container and the absorbent material. Subtask 29-13-38-420-053
B.
Preparation for the Test
(1)
Connect the hose coupling half to the fluid disconnect panel and tighten the coupling nut by hand.
(2)
TORQUE the coupling nut to between 9.04 and 10.17 m.daN (66.66 and
74.99 lbf.ft).
Subtask 29-13-38-870-051
C. Bleeding
(1)
Put a container below the connection between the suction hose coupling and the fluid disconnect panel.
(2)
Put absorbent material on the hose coupling nut.
(3)
On the connection between the hose coupling half and the suction hose:
-lightly loosen the upper end of the suction hose from its coupling half
-use two wrenches.
(4)
Let the hydraulic fluid flow from the disconnected connection into the container until there are no air bubbles.
(5)
When you complete the bleeding, TORQUE the hose coupling nut to between 21.47 and 23.73 m.daN (158.33 and 174.99 lbf.ft).
Subtask 29-13-38-710-051
D. Operational Test
(1)
Pressurize the Yellow hydraulic reservoir (Ref. TASK 29-14-00-614-002).
(2)
Pressurize the Yellow hydraulic system
(Ref. TASK 29-23-00-863-002).
(3)
Do an operational test of the Yellow hydraulic system (Ref. TASK 29-13-00-710-002)
(4)
During the dry motoring, make sure that there are no leaks from the connections.
(5)
Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the reservoir (Ref. TASK 12-12-29-611-001) or (Ref. TASK 12-12-29-611-002).
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