BRAKE SYSTEM
Drum Brakes
Have brake drum linings and disc
brake pads inspected by a qualified
mechanic for wear at regular intervals
according to the maintenance
schedule. In severe service or
off-highway applications inspect the
linings more frequently.
Automatic Slack Adjusters
Periodically check the Brake Chamber
Stroke. Replace the slack adjuster if
proper stroke cannot be maintained.
Operational checks of automatic
slack adjusters
•
Measure brake chamber stroke
with the spring brake released and
the air pressure no less than 100
psi (690 kPa).
•
Brake Chamber Stroke is the
difference between the applied
and the retracted position of the
air chamber pushrod.
•
A correctly installed and
functioning auto slack adjuster will
produce the following strokes:
Chamber Type
Stroke
36 (rear brakes)
1-1/2" - 2-1/4"
(38 - 57 mm)
30 (rear brakes)
1-1/2" - 2"
(38 - 51 mm)
16, 20 & 24 (front
brakes)
1" - 1-3/4"
(25.4 - 44.4 mm)
Brake Chamber Stroke
5-66
Y53-6060-1C1
(03/17)
5
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