(3)
32-00-15/201, Landing Gear Door Locks
(4)
32-00-20/201, Landing Gear Downlocks
(5)
32-41-00/201, Hydraulic Brake System
(6)
32-41-00/501, Hydraulic Brake System
C.
Access
(1)
Location Zones
143 Left MLG Wheel Well
144 Right MLG Wheel Well
D.
Prepare for Removal
(1)
Make sure the landing gear downlocks are installed (Ref 32-00-20).
S 494-002
S 494-003
ú WARNING:_______USE THE PROCEDURE IN AMM 32-00-15 TO INSTALL THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Open the main landing gear doors and install the door locks (Ref 32-00-15).
(3)
Put chocks on the wheels.
S 494-004
32-41-03
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757
MAINTENANCE MANUAL
SEE A
BRAKE INPUT CABLE SEE B
4
HYDRAULIC LINE
(7 PLACES)
METERING VALVE
3
2 QUADRANT
1
BRAKE DE-SPIN ACTUATOR
VALVE CRANK
LEFT WHEEL WELL BRAKE METERING VALVE
1
UNION, O-RING
2
FILTERED REDUCER, O-RING
3
REDUCER, O-RING
4
CHECK VALVE, O-RING
(RIGHT WHEEL WELL VALVE OPPOSITE) A
Brake Metering Valve Installation
Figure 401 (Sheet 1)
32-41-03
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MAINTENANCE MANUAL
LEFT WHEEL WELL METERING VALVE
WASHER METERING VALVE (4 PLACES) INPUT CONTROL ROD
RIGHT WHEEL WELL METERING VALVE
Brake Metering Valve Installation
Figure 401 (Sheet 2)
32-41-03
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MAINTENANCE MANUAL
S 864-005
(4) Release the parking brake.
S 864-006
(5) Remove the pressure from the left and right hydraulic systems and
reservoirs (Ref 29-11-00).
S 864-007
(6) Push in and release the brake pedals fully seven times to remove
hydraulic pressure from the brake accumulator.
NOTE:____ The brake metering valve installation in the left and right
wheel wells is almost the same. The valve crank and control
rod configurations for the metering valves in the left and
right wheel wells are different.
S 484-008
(7) Install rig pin LGB4/LGB5 (Detail A).
NOTE: This puts the metering valve in the spring-loaded OFF
____ position.
S 034-009
(8)
Disconnect the hydraulic lines (Detail A), seven locations from the metering valve.
S 494-010
(9)
Install a cap or plug on all open lines and ports.
S 034-011
CAUTION:_______DO NOT CHANGE THE CONTROL ROD ADJUSTMENT. IF YOU CHANGE THE ADJUSTMENT, THE SYSTEM MAY NOT OPERATE PROPERLY.
(10)
Disconnect the valve crank from the control rod.
S 024-036
(11)
Disconnect the valve crank from the valve spindle.
S 024-013
(12)
Hold the valve and remove the four bolts that attach the valve to the valve support and remove the valve.
32-41-03
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757 MAINTENANCE MANUAL
S 034-014
(13)
Remove the hydraulic fittings and O-rings from the valve, seven locations (Fig. 401). Discard the O-rings.
S 494-015
(14)
Install plugs in the ports in the metering valve.
TASK 32-41-03-404-016
3. Install the Brake Metering Valve Assembly (Fig. 401)_________________________________________
NOTE: The brake metering valve is the same on left and right wheel wells.
____ The valve cranks and the control rods for the metering valves are different for the valve installations in the left and right wheel well.
A. Equipment
(1)
Rig pins from Set B20003-XX (Ref 20-10-24)
(a)
LGB4 - P/N B20003-20
(b)
LGB5 - P/N B20003-20
B.
Consumable Materials
(1)
B00054 Lubricant, Hydraulic System Fittings -MCS 352
C.
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本文鏈接地址：757 AMM 飛機維護手冊 起落架 CHAPTER 32 - LANDING GEAR 2(147)
