204-76-99004 - Relationship of push rod and slack adjuster angle to brake force

204-76-99004. Relationship of push rod and slack adjuster angle to brake force

The following diagram shows the relationship of push rod and slack adjuster angle to brake force:

RESULT

EVEN TORQUE (BRAKE INPUT)

BETWEEN BRAKE ADJUSTMENTS

*LAST HALF OF CAM *FIRST HALF OF CAM ROTATION*
ROTATION* BRAKE CHAMBER EFFICIENCY IS
LEVERAGE INCREASING MAXIMUM AND LEVERAGE IS
TO THE MAXIMUM AND MINIMUM AT BEGINNING OF
BRAKE CHAMBER EFFI- STROKE. LEVERAGE INCREASES
CIENCY DECREASING WITH THE INCREASED MOVE-
WITH LENGTH OF MENT.
STROKE.   

POINT OF GREATEST LEVERAGE MOVEMENT PAST THIS POINT RESULTS IN LESS LEVERAGE, REDUCED INPUT AND LOWER BRAKE EFFICIENCY. *FIRST HALF OF RATED TRAVEL* BRAKE CHAMBER IS AT THE MAXIMUM EFFICIENCY.
(Amended by WSR 14-03-018, filed 1/7/14, effective 2/7/14)

Statutory Authority: RCW 46.37.005. 80-10-006 (Order 80-07-01), § 204-76-99004, filed 7/25/80.

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