Automatic Slack Adjuster Maintenance - Midland SIDE DUMP GRAVEL TRAILER Operator's Manual

5.2.9 SLACK ADJUSTERS (cont'd)
5.2.9.2 AUTOMATIC SLACK ADJUSTER
MAINTENANCE
In an S-cam type foundation brake, the final link
between the pneumatic system and the foundation
brake is the slack adjuster. The arm of the slack
adjuster is fastened to the push rod of the chamber
with a clevis and the spline end is installed on the
brake camshaft.
Primarily, the slack adjuster is a lever that converts
the linear force of the air chamber push rod into a
torque which turns the brake camshaft and applies
the brakes.
Service and Lubrication Intervals for
Standard Haldex AA1 and S-ABA Brake Adjusters
IMPORTANT
Automatic slack adjusters are for brake
adjustment and will not compensate for
faulty foundation brakes.
Routine Visual/Operational Checks
- Haldex strongly recommends that routine visual/
operational checks, including brackets and
control arms, be performed at each Preventative
Maintenance Service Interval.
- Adjusters or anchor brackets that have visual
damage, or which fail the operational checks, MUST
be replaced immediately.
- Automatic adjusters should not be operated as
manual adjusters except as may be necessary to get
the vehicle off the road for service.
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