ASA-5SLACK Adjuster Troubleshooting Chart

ASA-5®SLACK ADJUSTER TROUBLESHOOTING CHART (Continued)

SYMPTOMS	CAUSE	REMEDY

2. Brakes dragging—	A. ASA-5®slack adjuster	A. Correct the ASA-5®slack adjuster installation.
apparent	improperly installed. Too
over-adjustment of	close to actuator: brakes
brakes.	can’t fully release.

	B. Loose actuator push rod	B. Reposition components and torque to
		B. Reposition components and torque to
	jam nut.	speciﬁ cation.
		speciﬁ cation.

C.Spring brakes not fully C. Check spring brake release air pressure and

	retracting.	repair or replace air valving as necessary.
		Repair or replace spring brake.

D.	Broken foundation brake	D. Repair or replace as required per In Service
	components, including	Inspection.
	camshaft bushings.

E.	Vehicle brake torque	E. Check other brakes to ensure they are working.
	imbalance. (More work	Check air pressure balance and threshold pres-
	done by some brakes	sure (refer to Bendix publication BW-1555). Check
	than others, thermal	driver braking habits, e.g. use of trailer control
	expansion of drums).	valve. Use same friction material on all axles.

F.	Brake drum	F. Replace or repair as required.
	out-of-round, excessive
	thermal expansion.

G.	Air system malfunction,	G. Inspect and correct.
	not exhausting
	completely.

H.	New lining swells during	H. Back-off adjustment until brakes are free.
	break-in.