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1 Meritor Clearance Sensing ASAs February 2005 Meritor Clearance Sensing Automatic Slack Adjusters.

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Presentation on theme: "1 Meritor Clearance Sensing ASAs February 2005 Meritor Clearance Sensing Automatic Slack Adjusters."— Presentation transcript:

1 1 Meritor Clearance Sensing ASAs February 2005 Meritor Clearance Sensing Automatic Slack Adjusters

2 2 Meritor Clearance Sensing ASAs February 2005 Agenda Overview Competitive Comparison Technical Details and Operation Clearance Sensing ASA Interchanges Warranty Policy Product Specification Identification

3 3 Meritor Clearance Sensing ASAs February 2005 What Does An ASA Do? ASA’s Eliminate The Need For Constant Manual Brake Adjustment Provide Better Balance Between Individual Brakes Insures The Braking Stroke Is Maintained Within The Recommended Or Legal Limits Minimize Loss Of Braking Performance

4 4 Meritor Clearance Sensing ASAs February 2005 Meritor Clearance Sensing ASA Direct Replacement For Haldex Same Fit, Form, and Function Identical Components 55 Different ASA’s in Program Available via Meritor Competitively Priced Shipment Starting on 1/17/05 Aftermarket Only, No Spec Orders The Genuine Haldex ASA is Still Available via Euclid The Genuine Meritor stroke sensing ASA is Still Available via Euclid & Meritor

5 5 Meritor Clearance Sensing ASAs February 2005 Meritor vs. Haldex Cutaway Comparison MeritorHaldex

6 6 Meritor Clearance Sensing ASAs February 2005 How Do You Compare vs.…? ArvinMeritor Is the Only Supplier That Can Provide Both Stroke & Clearance Sensing ASA’s

7 7 Meritor Clearance Sensing ASAs February 2005 How Does This ASA Work? The Clearance Is Adjusted When: Excess Clearance Exists Between the Brake Shoes and Drums Occurs with Normal Wear in the foundation brake The ASA will rotate to the necessary position to eliminate the clearance What Occurs Inside the ASA: Inside the ASA are a number of components that maintain a pre-set running clearance or gap The control arm is fixed to the anchor bracket The toe of the control arm touches a notch in the control disk The depth of this notch is the key factor that maintains the gap

8 8 Meritor Clearance Sensing ASAs February 2005 How Does This ASA Work? Utilizes clearance sensing technology. Senses excessive drum to lining clearance on the apply stroke. Adjusts on the release stroke.

9 9 Meritor Clearance Sensing ASAs February 2005 How Does This ASA Work? Upon brake application, the ASA body moves laterally rotating the camshaft. The control arm is stationary. The enclosed rack clearance is eliminated (clearance notch) and contacts the control disc. The rack is pushed upwards by the control disc. Rack rotates the one-way clutch assembly, which is allowed to slip in this direction. As brake torque increases, the coil spring is compressed and the wormshaft is moved in the reverse direction of the ASA body.

10 10 Meritor Clearance Sensing ASAs February 2005 How Does This ASA Work? As brake torque increases, the coil spring is compressed and the wormshaft is moved in the reverse direction of the ASA body. The movement of the wormshaft disengages the cone clutch in the clutch assembly. The two actions above occur to prevent over adjustment of the brake, and only allow measurement of the lining to drum clearance by the ASA. IE: once the lining touches the drum the ASA clutch assembly no longer senses ASA movement because it is disengaged.

11 11 Meritor Clearance Sensing ASAs February 2005 How Does This ASA Work? When the brake is released, the coil spring pushes the wormshaft back to its original position, reengaging the cone clutch. The rack is pulled back to its original position by the control disc. The rack rotates the one-way clutch, which is now locked, then rotates the wormshaft through the locked clutch. The wormshaft rotates the worm wheel and camshaft, adjusting the brake.

12 12 Meritor Clearance Sensing ASAs February 2005 Clearance Sensing ASA Interchange Meritor#Haldex ASA#Haldex ASA Kit Meritor#Haldex ASA#Haldex ASA Kit R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R

13 13 Meritor Clearance Sensing ASAs February 2005 Warranty Policy On-Highway & Linehaul Applications 5 Years or 500,000 Miles Severe Service* Applications 2 Years or 100,000 Miles * As Defined by the 2005 ArvinMeritor Warranty Book SP Warranty Claims Will Require a Return to ArvinMeritor

14 14 Meritor Clearance Sensing ASAs February 2005 Identifying Specifications Clevis Pin Diameter Arm Length Spline Size Spline Count

15 15 Meritor Clearance Sensing ASAs February 2005 Identifying the Part Number Part Number Identification

16 16 Meritor Clearance Sensing ASAs February 2005 Part Number & Date of Manufacturing Identification Year of Manufactured (4 = 2004) Week Manufactured (40 = 40 th Week) Part Number Serial Number Face Plate Number


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