hold momentarily, and then release. 2) Make sure the pistons of the brake unit operate with the manual operation of the brake pedals.
(c)
Do these steps to do a check of the brake unit for leaks: 1) Push one set of brake pedals to the limit of travel to
fully operate the brakes. 2) Hold the brake pedals in this position for two minutes.
NOTE: You can set the parking brake to hold the brake
____ pedals in the position that fully operates the brakes.
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3) After the brakes are operated for two minutes, look to make sure there are no leaks around the brake unit housing, and at the hydraulic brake disconnect. No leaks are permitted.
4) Release the brakes.
5) With the brakes released, look to make sure there are no leaks around the brake unit housing and at the hydraulic brake disconnect. No leaks are permitted.
(d) Do these steps to do a check for sufficient running clearance at the brake:
NOTE: The running clearance is the distance between the
____ pressure plate and each piston insulator of a brake unit.
1) Make sure the parking brake is released.
2) Make sure the brakes are not operated manually.
3) Turn all rotors of the brake unit at the same time.
4) Make sure all the rotors turn freely.
(e) Remove the power from hydraulic system 4 (AMM 29-11-00/201).
S 434-062
(10) If the wheel speed transducer is not installed, install it (AMM 32-42-04/401).
S 434-066
CAUTION: DO NOT PUT FORCE ON THE HEAT SHIELDS OF THE BRAKE UNIT WHEN YOU
_______ REMOVE AND INSTALL THE WHEEL AND TIRE. BENT HEAT SHIELDS FREQUENTLY CANNOT BE REPAIRED. A BRAKE UNIT WITH A BENT HEAT SHIELD WILL CAUSE SCORING OF THE WHEEL INNER SURFACE WHEN THE WHEEL TURNS.
(11)
Install the wheel and tire assembly (AMM 32-45-01/401).
S 434-052
(12)
Connect the brake rod to the torque arm of the brake unit housing with the bolt (2), washer (3), and nut (4) (Fig. 402).
NOTE: Install the bolt with the bolthead to the truck beam side.
____
(a) Apply a thick layer of Royco 11MS grease to the bolt shank and threads, the washer and the nut.
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(b)
Tighten the nut 10-50 pound-feet.
(c)
If it is necessary, turn the nut counterclockwise to align the castellations in the nut with the nearest locking hole in the bolt.
(d)
Install the cotter pin (5).
S 644-053
(13)
Lubricate the zerk fittings on the brake rod and on the torque arm with Royco 11MS grease.
S 764-092
(14)
Remove the DO-NOT-CLOSE tag(s) and close these circuit breakers if open:
(a)
P180, DC Power Distribution Panel
1) 180J10, BRAKE TEMP IND
2) 180J9, TORQUE LIMIT 1, 5, 9, 13
3) 180F9, TORQUE LIMIT 2, 6, 10, 14
4) 180J24, TORQUE LIMIT 3, 7, 11, 15
5) 180F24, TORQUE LIMIT 4, 8, 12, 16
S 734-093
(15)
Do this task: "Brake Temperature Monitoring System - Ground Test" (AMM 32-46-00/501).
S 744-068
(16)
If you disconnected and connected the wire to the wheel speed transducer, do the Brake System BITE Test procedure in the "Ground Tests - Brake Control System" task (AMM 32-42-00/501).
J.
Put the Airplane Back to Its Initial Condition.
S 094-083
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
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