32-41-00
ALL ú ú 01 Page 203 ú Jul 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 842-058
(3) Connect a flexible hose to the bleeder valve.
S 842-059
(4) Put the free end of the hose in a clean container not fully filled
with the same fluid used in the brake system.
S 842-060
(5) Remove the lockwire on the bypass lever of the hydraulic fuse for
the brake that is bled.
NOTE:____ The Decoto hydraulic fuse does not have lockwire installed on
the lever.
S 842-061
(6) Move the bypass lever to the open position, hold it open and apply the brakes.
NOTE: Always operate the brake fuse bypass valve before you apply
____ the brakes.
S 872-062
(7)
Apply the brakes while you open and close the bleeder valve on the brakes with an applicable wrench.
S 872-063
(8)
Do this operation until all the air is gone from the flow of fluid.
S 842-064
(9)
Close the bleeder valve while the pressure is kept on.
S 842-065
(10)
Remove the bleed hose, tighten the bleeder valve to 40 pound-inches, and install the bleed screw and the washer.
S 842-066
(11)
Release the bypass lever on the fuse, allow the lever to go back to the closed position and install the lockwire.
NOTE: The Decoto hydraulic fuses do not have lockwire installed on
____ the lever.
S 612-067
(12) Fill the hydraulic reservoir of system A (AMM 12-12-00/301).
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32-41-00
ALL ú ú 01 Page 204 ú Jul 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 842-024
(13) Set the parking brake.
TASK 32-41-00-702-025
2. Hydraulic Brake Fuse Test
_________________________
A. General
(1)
The hydraulic brake fuse test does a check on the capacity of the fuse to control the fluid leak when a hydraulic line breaks. Do the test for each fuse in the system.
B.
Standard Tools and Equipment
(1)
Container - 2 U.S. gallons capacity
C.
References
(1)
AMM 12-12-00/301, Hydraulic Reservoir
(2)
AMM 29-15-00/201, Hydraulic System
D.
Access
(1)
Location Zone
101 Left Control Cabin
102 Right Control Cabin
310 Left Main Landing Gear
410 Right Main Landing Gear
E.
Normal Brake System Test.
S 842-026
(1)
Remove the screw from the end of the bleed fitting on the brake and install the bleed hose in the end of the fitting.
S 842-027
(2)
Put a container with a minimum capacity of two U.S. gallons below the brake bleed fitting.
(3)
Pressurize the hydraulic system B (AMM 29-15-00/201).
S 722-029
(4)
Push the brake pedals to the maximum position to apply full brake pressure.
S 842-028
NOTE: The parking brake can be used to keep the brake pedals pushed
____
during the check.
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32-41-00
ALL ú ú 01 Page 205 ú Mar 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 722-030
(5) While full brake pressure is applied, open the brake bleeder valve
and let the fluid go into the container until the flow stops.
S 722-031
(6) Make sure that the quantity collected in the container is
42-80 cubic inches or approximately 0.18 to 0.35 gallons.
S 842-032
(7) Close the bleeder valve and remove the bleed hose.
S 432-033
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