BENDIX ASA-5 AUTOMATIC SLACK ADJUSTER Manual - Page 8
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CLEANING AND INSPECTION
1. Inspect the worm gear camshaft splines for damage. If
damaged, replace the ASA-5
2. Clean and inspect the yoke pin and link pin holes in the
yoke, adjuster link and slack adjuster body. The holes
should be visually round with no perceptible "egg
shaping." A new yoke pin and link pin can be used to
make this inspection. If this condition is noted, the
affected part must be replaced.
3. Clean out the retaining ring grooves in the yoke.
REASSEMBLY
1. If the ASA-5
™
slack adjuster uses a yoke pin bushing,
press it into the slack adjuster arm.
2. Depending on environmental conditions an application
of anti-seize compound to both the yoke and link pins
may facilitate later removal. Install the yoke and secure
™
it to the ASA-5
slack adjuster body and link using the
yoke pin and link pin. Install washers and cotter pins in
the yoke pin and link pin, and secure each. Bend each
leg of the cotter pins to a minimum of 25 degrees,
creating an included angle of at least 50 degrees between
the legs.
3. Lubricate the automatic slack adjuster through the lube
fitting with a quality multipurpose chassis lubricant
(N.L.G.I. Grade 2). Lubricate the slack adjuster until clean
lubricant flows from the grease relief opening in the boot.
8
™
slack adjuster.
RETROFITTING THE ASA-5
ADJUSTER
PREPARATION
The Bendix
®
ASA-5
™
automatic slack adjuster can replace
a manual slack or competitive automatic slack adjuster
provided some considerations are kept in mind:
1. Excessive duty cycles, high application pressures and
brake force compounding can result in reduced slack
adjuster durability.
2. Determine that the AL factor of the vehicle to be retrofitted
is 195 or less. To determine the AL factor multiply the
slack adjuster arm length (from the center of the cam
spline to the center of the yoke pin hole in use) times
the brake chamber size. Example: a type 30 brake
chamber connected to a 6 inch arm slack adjuster, A =
30 square inches, L = 6 inches; therefore, 30 x 6 = 180,
AL factor.
3. Make sure the foundation brake components are in good
condition. Excessive drum out-of roundness will result
in excessive lining wear. See the In Service Inspection
section contained in this manual.
4. In order to select the proper slack adjuster, choose an
ASA-5
™
slack adjuster with the same arm length, spline
size, push rod thread size and offset as the slack adjuster
it is replacing.
5. When retrofitting the Bendix
make certain to read the instructions packaged with all
service replacement ASA-5
™
SLACK
®
™
ASA-5
slack adjuster,
™
slack adjusters.