Bendix Commercial Vehicle Systems AUTO SLACK ADJUSTER SERVICE MANUAL - Manual (Page 11)

10
ROTATE
TO STOP
MOUNTING
BRACKET
Figure 16 Position Brake Adjuster
Position the Control Arm
6. Rotate the control arm counterclockwise away from
adjustment hex towards the air chamber until it comes to a
definite internal stop. (See Figure 16.) If necessary, use a
plastic mallet to tap the control arm into position.
Caution: Excessive positioning force may damage the
control arm. Most adjusters will be equipped with an
Installation Indicator. Indicator must fall within the
slot for proper installation. Incorrect control arm
position can cause tight or dragging brakes.
7. Tighten all control arm anchor bracket fastener(s).
Note: Make sure the control arm does not move from its
position while tightening the anchor bracket fasteners.
Note: Steer axle applications only–a gap of 1/16" should be
maintained between the anchor bracket and the control arm.
(See Figure 17.)
8. Adjust brakes by turning adjusting hex clockwise until the
lining contacts the drum. Then rotate the adjusting hex
counter clockwise 1/2 of a turn. A minimum of 13 ft. lbs. is
necessary to overcome the clutch and a racheting sound
will occur.
Final Inspection of the Self Adjusting Brake Adjuster
9. With full air pressure, release spring and service brake.
Verify that the installation indicator is within the slot.
Remove the clevis pin. The clevis hole and adjuster hole
should remain in alignment. If the air chamber clevis pulls
into the air chamber, repeat the installation procedure.
10. After final inspection, install the cotter pin into the clevis
pin. Verify that applied stroke is within the legal limits
for the air chamber being used.
AIR
CHAMBER
CLAMP-TYPE
BRACKET
ANCHOR
BRACKET
AUTOMATIC
SLACK
ADJUSTER
1/16"
GAP
Figure 17 Proper Anchor Bracket and Control Arm Gap
Installation
SELF ADJUSTING
BRAKE ADJUSTER