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 TM 9-8000
Figure 34-8. Self-Engergizing and Servo Action
drum to Increase more than the radius of the brakeshoe.
wet due to adverse driving conditions. The water
As a result, a change in pressure distribution between
reduces the frictional properties of the brake system and
the linings and drum occurs, which may reduce the
must be removed to restore braking ability. This is a very
braking ability of the vehicle up to 20 percent. The
dangerous situation and drastically reduces the vehicle's
enclosed design of the drum brake assembly does not
stopping ability until the water is discharged from the
allow for water to be expelled rapidly should the brake
brakedrum area. The use of many springs and clips
cavity become
makes TA233860
34-8
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