S 024-012
(2)
Disconnect the tube from the top of the transducer.
S 034-013
(3)
Remove the union and packing.
S 964-014
(4)
Discard the packing.
S 024-016
(5)
Remove the lockwire, the nut and the transducer.
TASK 32-41-14-404-017
3. Install the Hydraulic Brake Pressure Transducer (Fig. 401)
_______________________________________________
A. Equipment
(1)
Main Gear Door Locks (AMM 32-00-15/201)
B.
Consumable Materials
(1)
B00054 Lubricant, Hydraulic System Fittings -MCS 352
(2)
B00058 Soap-Solution (Noncorrosive)
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C. References
(1)
AMM 10-11-01/201, Normal Parking
(2)
AMM 12-15-04/301, Parking Brake Accumulator
(3)
AMM 29-11-00/201, Main Hydraulic Systems
(4)
AMM 32-00-15/201, Landing Gear Door Locks
D.
Access
(1)
Location Zone
144 Right Main Landing Gear Wheel Well
E.
Install the Transducer
S 644-018
(1)
Lubricate the new packing.
S 434-019
(2)
Install the new packing and union into the transducer.
S 424-020
(3)
Install the transducer and nut into the bracket.
S 434-021
(4)
Install lockwire on the nut.
S 434-023
(5)
Connect the tube to the top of the transducer.
S 424-024
(6)
Connect the electrical connector to the transducer.
S 864-025
(7)
Pressurize the accumulator (AMM 12-15-04/301).
S 434-026
(8)
Install the cap on the charging valve.
S 214-027
(9)
Use a soap solution at the tube connection to examine for leaks.
F.
Do a Check of Transducer Operation
S 724-028
(1) Make sure the pressure indication of the HYD PRESS gage on the Captain's Main Instrument Panel, P1, is 2800 to 3200 psig.
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S 724-029
(2)
Make sure the pressure indication on the HYD PRESS gage on the Captain's instrument panel is approximately the same as the indication on the direct reading pressure gage in the wheel well, adjacent to the accumulator.
G.
Put the Airplane Back to Its Usual Condition
S 864-030
(1)
Pressurize the left and right hydraulic systems (AMM 29-11-00/201).
S 864-031
(2)
Set the parking brakes (AMM 10-11-01/201).
S 414-032
WARNING:_______USE THE PROCEDURE AMM 32-00-15 TO REMOVE THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3)
Remove the door locks from the main landing gear doors and close the doors (AMM 32-00-15/201).
S 864-033
(4)
Remove the pressure from the hydraulic system if it is not necessary (AMM 29-11-00/201).
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ANTISKID/AUTOBRAKE SYSTEM - DESCRIPTION AND OPERATION
_____________________________________________________
1. General_______
A. The antiskid and the autobrake systems are used in airplane braking. The antiskid system prevents wheel skids by limiting pressure to the brakes. The autobrake system provides automatic braking with the braking level selected by the pilot.
B. Full power braking systems require precise metering of hydraulic pressure to the brakes. The antiskid system works solely to prevent wheel skids. The autobrake system works with the antiskid system to provide complete automatic (feet off) braking. Simplified hydraulic and electrical flows of the antiskid and autobrake systems are shown in Fig. 12 and 14.
C. Antiskid system (Fig. 1)
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