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Page Title:
SERVICE BRAKE BLEEDING - continued |
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 TM 9-2320-361-24-1
0172 00
SERVICE BRAKE BLEEDING (Contd)
WARNING
Accidental or intentional introduction of liquid contaminants
into the environment is a violation of state, federal, and
military regulations. Refer to Army POL (WP 0001 00) for
information concerning storage, use, and disposal of these
liquids. Failure to do so may result in damage to environment
and health of personnel.
CAUTION
Do not reuse brake fluid. Reusing brake fluid may result in
damage to equipment.
NOTE
Use a drain pan to capture any draining brake fluid. Dispose of
fluids in accordance with local policy and ordinances. Ensure all
spills are cleaned up.
MANUAL METHOD
1.
Remove screw-assembled lockwasher (7) from brace (2) and open access door (1) exposing top of
master cylinder (6). Discard screw-assembled lockwasher (7).
2.
Disconnect vent line (3) from adapter (4).
3.
Clean top of master cylinder (6) and remove filler plug (5).
4.
Fill master cylinder (6) with fresh brake fluid to 1/2 in. (1.27 cm) from top.
5.
Install filler plug (5).
CAUTION
Always bleed air-hydraulic cylinder before bleeding
downstream hydraulic components. Failure to do so may result
in damage to equipment.
6.
Clean area around bleeder screw (8) on air-hydraulic cylinder (11).
7.
Connect a snug fitting flexible hose (9) on bleeder screw (8) and immerse other end of hose (9) in a
transparent container (10) 1/3 to 1/2 filled with brake fluid. Keep end of hose (9) always under
surface of brake fluid.
NOTE
Assistant is required for steps 8 through 14.
8.
Have assistant slowly apply and release brake pedal (12) twice, then slowly apply and hold down
brake pedal (12). Have assistant tell you when holding down brake pedal (12).
9.
While assistant holds brake pedal (12) down, open bleeder screw (8) 3/4 turn on air-hydraulic
cylinder (11) or bleeder screw (14) on wheel cylinder (13). Observe for air bubbles in container (10)
or (16).
10.
Close bleeder screw (8) or (14) and inform assistant to release brake pedal (12). Refill master
cylinder (6) with brake fluid.
11.
Repeat steps 8 through 10 until no air bubbles appear when brake pedal (12) is applied.
12.
Remove hose (9) from bleeder screw (8) and tighten bleeder screw (8) 1020 lb-ft (1427 Nm).
NOTE
If wheel cylinders are to be bled, go to step 13. If not, go to
step 17.
If more than one wheel cylinder is to be bled, start with wheel
cylinder farthest from master cylinder and progress in
sequence to wheel cylinders closest to master cylinder.
13.
Clean around bleeder screw (14) on wheel cylinder (13).
14.
Connect a snug fitting flexible hose (15) to bleeder screw (14) and immerse end of hose (15) in a
transparent container (16) 1/3 to 1/2 filled with brake fluid. Keep end of hose (15) always under
surface of brake fluid.
0172 00-4
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