BENDIX ASA-5 AUTOMATIC SLACK ADJUSTER Manuel - Page 9
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ASA-5
™
SYMPTOMS
1. Brake Actuator stroke is
too long.
WARNING: Automatic
slack adjusters should
not be manually
adjusted in an effort to
correct excessive push
rod stroke, because
this condition indicates
that a problem exists
with the automatic
adjuster, with the
installation of the
adjuster, or with
related foundation
brake components,
which manual
adjustment will not fix.
SLACK ADJUSTER TROUBLESHOOTING CHART
CAUSE
A. Loose actuator push rod
jam nut.
B. Excessive clearance
between adapter/adapter
bushing and yoke due to
wear.
C. Excessive clearance
between components:
yoke pin—yoke
link pin—link
yoke pin—body.
D. Damaged (worn)
splines on slack or
camshaft.
E. Weak or broken brake
actuator return springs.
Weak or broken brake
shoe return spring.
F. Worn or broken
foundation brake
components, including
camshaft bushings,
brake chamber bracket,
etc.
G. ASA-5
™
adjuster
mechanism not
functioning.
H. Brake drum—worn,
excessively machined,
bell-mouthed,
excessive thermal
expansion.
I.
Damaged ASA-5
adjuster.
™
J.
ASA-5
slack adjuster
improperly installed.
A. Reposition components and torque to
specification.
B. Replace damaged or worn parts.
C. Replace worn parts.
D. Replace damaged parts.
E. Replace weak or broken springs.
F. Repair or replace as required per In Service
Inspection.
G. Lubricate, test adjuster mechanism, conduct in
service inspection, repair components as
necessary, replace.
H. Replace or repair as required.
™
slack
I. Replace component(s) or slack adjuster.
J. Correct installation position.
REMEDY
9