3. Job Set-up
__________ Subtask 29-13-49-860-067
A. Aircraft Maintenance Configuration
(1)
Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001)
(2)
Depressurize the Yellow hydraulic reservoir (Ref. TASK 29-14-00-614-001).
(3)
Put warning notice(s) in position to tell persons not to pressurize the Yellow hydraulic system: - on the ground service panel 198CB.
(4)
Put warning notice(s) on the access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.
Subtask 29-13-49-941-065
B. Safety Precautions
(1)
On the center pedestal, on the ENG panel 115VU:
-put warning notice(s) 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)
Put warning notice(s) 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)
Put warning notice(s) to tell persons not to energize the FADEC 1(2).
(6)
Put a container below the hydraulic pump to collect the remaining hydraulic fluid in the pressure hose/tube (20).
Subtask 29-13-49-010-064
C. Get Access
R (1) Open the left fan-cowl door (Ref. TASK 71-13-00-010-040): FOR 1000EM2 open the door 447AL.
(2)
Put the access platform in position at the engine.
Subtask 29-13-49-865-053
D.
Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 3700GD Q37
4. Procedure
_________
(Ref. Fig. 403/TASK 29-13-49-991-906, 404/TASK 29-13-49-991-907)
Subtask 29-13-49-020-061
A. Removal of the Pressure Hose/Tube Assembly
(1) Disconnect the pressure hose/tube (20) from the union in the hydraulic pump and let the fluid flow in the container.
NOTE : Use a second wrench to hold the union on the hydraulic pump
____ when you loosen the coupling nut on the pressure hose/tube.
(2)
Disconnect the pressure hose/tube (20) from the fluid disconnect panel at the top of the engine.
(3)
Remove the bolt (5), the washers (10) and the clamp (15) that attach the pressure hose/tube (20) to the higher bracket.
(4)
Remove the bolts (5), the washer (10) and the clamps (15) that attach the pressure hose/tube (20) to the two channels.
(5)
Disconnect the pressure switch tube from the tee-fitting on the pressure hose/tube (20).
NOTE : Use a second wrench to hold the flats of the tee-fitting when
____ you loosen the coupling nut on the tube.
Hydraulic Pressure Hose/Tube Assembly
Figure 403/TASK 29-13-49-991-906
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Hydraulic Pressure Hose/Tube Assembly
Figure 404/TASK 29-13-49-991-907
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(6)
Remove the bolt (5), the washer (10) and the clamp (15) that attach the pressure hose/tube (20) to the lower bracket.
(7)
Remove the bolt (25), the washer (30) and the nut (35) from the band of the center mount clamp (40).
(8)
Open the band of the clamp (40) and remove the pressure hose/tube
(20) from the insert. Put the band on the insert and install the bolt (25), the washer (30) and the nut (35).
(9)
Remove the pressure hose/tube (20) from the engine.
(10) Put protective covers on the tee-fitting and the ends of the pressure hose/tube (20), the union on the hydraulic pump and the fitting on the fluid disconnect panel.
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