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Page Title:
SERVICE BRAKE SYSTEM BLEEDING - continued |
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 TM 9-2320-386-24-1-1
0154 00
SERVICE BRAKE SYSTEM BLEEDING (Contd)
BLEEDING WHEEL CYLINDERS
CAUTION
The air-hydraulic cylinders must be bled before bleeding wheel
cylinders or brakes will not work properly.
NOTE
The left-hand air-hydraulic unit controls the rear axle brakes. The
right-hand air-hydraulic unit controls brakes on the front axle.
When a brake line has been taken off at only one wheel, bleed the
wheel cylinder at that wheel only.
When all wheel cylinders must be bled, start with the wheel
cylinder farthest away from the master cylinder on that system.
When replacing both air-hydraulic units, bleed right-front and
right-rear wheel cylinders to ensure no air is in line.
When replacing only one air-hydraulic unit, bleed the appropriate
wheel cylinder to ensure no air is in line.
1.
Ensure master cylinder reservoir (1) is full.
2.
Using clean rag, clean bleeder screw (2) on wheel cylinder (5).
3.
Install one end of bleeder hose (3) on bleeder screw (2).
4.
Place other end of bleeder hose (3) into transparent container (4).
5.
Fill transparent container (4) one-half full with silicone brake fluid.
6.
Ensure that end of bleeder hose (3) is below level of silicone brake fluid.
NOTE
Assistant will help with steps 7 through 10.
7.
Slowly pump brake pedal three times and hold brake pedal down after last pump.
8.
Loosen bleeder screw (2) three-fourths of a turn.
9.
Look for air bubbles in silicone brake fluid in transparent container (4).
10.
Tighten bleeder screw (2), have assistant release brake pedal, and fill master cylinder reservoir (1)
with silicone brake fluid.
11.
Repeat steps 7 through 10 until there are no air bubbles in transparent container (4).
12.
Remove bleeder hose (3) from bleeder screw (2) and transparent container (4). Ensure bleeder
screw (2) is tight and master cylinder reservoir (1) is full.
13.
Dispose of silicone brake fluid in transparent container (4) in approved disposal area.
14.
Repeat steps 1 through 13, as required, for each wheel cylinder.
0154 00-4
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