(3)
Use a block gage to make sure that the plunger is in the fully extended position.
S 824-014
(4)
Use the shims between the mount and the brake feel augmentor to adjust the gap between the roller and the plunger.
(5)
Install the jamnut and the lockwire on the brake feel augmentor.
S 644-016
(6)
Lubricate the packing and the union with a thin coat of clean hydraulic fluid.
S 424-015
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S 424-017
(7)
Install the packing and the union, and connect the hydraulic line.
S 844-018
(8)
Pressurize the hydraulic system B (Ref 29-15-00/201).
S 874-019
(9)
Bleed main gear brake system (Ref 32-41-00/201).
S 724-020
(10)
Apply the brakes fully.
S 724-021
(11)
Monitor the movement of the wear indicator pin on the breke when the brake pedals are pushed to make sure that the brakes operate correctly.
S 864-028
(12)
Release the brake pedals.
S 224-029
(13)
Do a check to make sure that the gap between the augmentor plunger and the roller is correct as follows:
(a)
Make sure that the feel augmentor plunger is fully extended by manually extending the plunger.
(b)
Do a check to make sure that the gap between the augmentor plunger and the roller is as shown in Fig. 402.
(c)
If necessary, adust the gap and lockwire the jamnut.
F.
Restore the Airplane to Normal
(1)
Fill the hydraulic reservoir (Ref 12-12-00/301).
(2)
Set the parking brake.
S 614-023
S 844-024
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S 214-025
(3) After 5 to 10 minutes, do a check on the hydraulic connection for leaks.
Brake Feel Augmentor Adjustment
Figure 402
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737-300/400/500MAINTENANCE MANUAL
ANTISKID SYSTEM - DESCRIPTION AND OPERATION
___________________________________________
1. General_______
A. The antiskid system is an electro-hydraulic subsystem placed in the hydraulic brake system to prevent manual or automatic braking action that causes skidding. Under any runway condition or selected brake pressure, the antiskid system will monitor wheel deceleration rates and maintain maximum wheel adhesion. The antiskid system is programmed to provide touchdown and locked wheel protection from air-ground and wheel speed sensings. A landing gear lever operated switch provides a disable function for landing gear retraction braking. An ON-OFF switch gives the crew control of the antiskid system and a annunciator light gives notice of defective systems. A built-in-test capability provides continuous self test and fault indication. Further manual testing is provided to detect component faults. The autobrake system shares air-ground and wheel speed sensings with the antiskid system and requires a fault free antiskid system to operate.
B. An alternate antiskid system is automatically scheduled to operate from hydraulic system A pressure when hydraulic system B pressure fails, transferring command by alternate antiskid to the operation of paired wheels of each gear.
C. The antiskid system consists of individual wheel speed transducers, an antiskid control unit, six antiskid control valves, a main gear squat switch, a nose gear squat switch and a landing gear lever switch (Fig. 1). The system also includes an ON-OFF control switch and an INOP annunciator light. Built-in-testing is provided on an automatic/ continuous basis supplemented with a manual test capability at the antiskid control unit.
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