BENDIX SD-05-1269 Slack adjusters should, Not be manually, Adjusted in an effort, Push rod stroke

ASA-5®SLACK ADJUSTER TROUBLESHOOTING CHART

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

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