Bendix Commercial Vehicle Systems ASA-5 AUTOMATIC SLACK ADJUSTER 2/11 - Manual (Page 10)

10
ASA-5 ® SLACK ADJUSTER TROUBLESHOOTING CHART (Continued)
SYMPTOMS
A. ASA‑5 ® slack adjuster
improperly installed. Too
close to actuator: brakes
can’t fully release.
B. Loose actuator push rod
jam nut.
C. Spring brakes not fully
retracting.
CAUSE REMEDY
2. Brakes dragging—
apparent
over‑adjustment of
brakes.
A. Correct the ASA‑5 ® slack adjuster installation.
B. Reposition components and torque to
specification.
C. Check spring brake release air pressure and
repair or replace air valving as necessary.
Repair or replace spring brake.
D. Repair or replace as required per In Service
Inspection.
E. Check other brakes to ensure they are working.
Check air pressure balance and thres hold pres‑
sure (refer to Bendix publication BW‑1555). Check
driver braking habits, e.g. use of trailer control
valve. Use same friction material on all axles.
F. Replace or repair as required.
D. Broken foundation brake
com ponents, including
camshaft bushings.
E. Vehicle brake torque
imbalance. (More work
done by some brakes
than others, thermal
expansion of drums).
F. Brake drum
out‑of‑round, excessive
thermal expansion.
G. Air system malfunction,
not exhausting
completely.
H. New lining swells during
break‑in.
G. Inspect and correct.
H. Back‑off adjustment until brakes are free.