PDFWAC 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 ROTATION* LEVERAGE INCREASING TO THE MAXIMUM AND BRAKE CHAMBER EFFICIENCY DECREASING WITH LENGTH OF STROKE. | *FIRST HALF OF CAM ROTATION* BRAKE CHAMBER EFFICIENCY IS MAXIMUM AND LEVERAGE IS MINIMUM AT BEGINNING OF STROKE. LEVERAGE INCREASES WITH THE INCREASED MOVEMENT. |
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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. |
[Statutory Authority: RCW 46.37.005. WSR 14-03-018, § 204-76-99004, filed 1/7/14, effective 2/7/14; WSR 80-10-006 (Order 80-07-01), § 204-76-99004, filed 7/25/80.]