B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
No specific lockwire corrosion resistant steel 0.8 (0.03 in) dia
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 29-10-00-863-002 Pressurize the Yellow Hydraulic System 29-10-00-864-002 Depressurize the Yellow Hydraulic System 32-12-00-010-001 Open the Main Gear Doors for Access 32-12-00-410-001 Close the Main Gear Doors after Access 32-43-00-991-002 Fig. 301
3. Job Set-up
__________
Subtask 32-43-00-860-050
A. Aircraft Maintenance Configuration
(1)
On the panel 400VU, make sure that the landing-gear normal control-lever is set to DOWN.
(2)
On the panel 110VU, make sure that the PARK BRK control switch is set to OFF.
(3)
Make sure that the Green and the Yellow hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).
Subtask 32-43-00-941-052
B. Safety Precaution
(1) Put the warning notices in position to tell persons not to operate:
-
the landing-gear normal control-lever,
-
the PARK BRK control switch,
-
the brake pedals, and not to pressurize the Green and the Yellow hydraulic systems.
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C. Get Access
(1)
Open the main doors of the main gear (Ref. TASK 32-12-00-010-001).
(2)
Put the access platform below the access door 811.
(3) Open the access door 811. Subtask 32-43-00-480-050
D. Preparation for Replenishment
(Ref. Fig. 301/TASK 32-43-00-991-002)
(1)
On the reservoir 2624GM:
-disconnect the drain hose (aircraft system) from the bleed valve
-connect a transparent hose on the bleed valve to collect the hydraulic and monitor the presence of air bubbles during the filling operation
-put the other end of the hose into a container
-cut, remove and discard the lockwire, then open the bleed valve.
(2)
On the alternate-brake distribution dual-valve 2577GM, remove the plugs of the bleed valves. Remove and discard the lockwire and open the bleed valves on the unions J and K.
(3)
Install a filling valve on each of the bleed valves.
(4)
Connect the UNIT, FILLING - AIRCRAFT BRAKE SYSTEM (98A29001001000) to the filling valves installed on the bleed valves of the alternate brake distribution dual valve 2577GM.
NOTE : Fill all the lines of the filling unit. Make sure that there
____
are no air bubbles in the connection.
(5) On each brake unit, connect a hydraulic pressure gauge valve at the Yellow system bleed valve. Then open the bleed valves.
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Low Pressure Control System of the Alternate Braking with Anti Skid - Filling
and Bleeding
Figure 301/TASK 32-43-00-991-002
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4. Procedure
_________
Subtask 32-43-00-611-051
A. Bleeding and Replenishment of the Alternate Brake Control Reservoir
(1)
Depressurize the brake Yellow-pressure accumulator 2582GM (Ref. TASK 29-10-00-864-002).
(2)
Open the filling valves on the bleed valves of the alternate brake distribution dual valve 2577GM. Fill until the fluid flows with no air bubbles from the bleed valve of reservoir 2624GM. The supply pressure must not be more than 4 bar (58.0150 psi).
(3)
Close the filling valve on the left bleed valve (union J). Use the filling valve on the right bleed valve (union K) to continue the filling operation. Monitor the fluid flow. When the fluid flows with no air bubbles, open the filling valve on the left bleed valve (union J).
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