1. Meritor Clearance Sensing Automatic Slack Adjusters

2. Agenda Overview Competitive Comparison Technical Details and Operation
Clearance Sensing ASA Interchanges
Warranty Policy
Product Specification Identification

3. 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. 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. Meritor vs. Haldex Cutaway Comparison

6. How Do You Compare vs.…?
Meritor is the only stroke sensing ASA on the market. Both stroke and clearance ASA perform well. All ASAs must be maintained to provide proper brake adjustment.
ArvinMeritor Is the Only Supplier That Can Provide Both Stroke & Clearance Sensing ASA’s

7. 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. 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. 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. 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. 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. Clearance Sensing ASA Interchange
Meritor#
Haldex ASA#
Haldex ASA Kit
R806009
R806016
R806503
R806018
R806502
R806017
R806010
R806002
R806011
R806003
R806025
R806019
R806012
R806013
R806505
R806020
R806504
R806014
R806500
R806021
R806501
R806015
R806507
R806005
R806508
R806006
R806024
R806007
R806004
R806008
R806026
R806001
R806023
R806000
R806022
R806506
Haldex ASA part#’s start 409-xxxxx, but are serviced in the aftermarket by a 400-xxxxx part number. This aftermarket ASA Kit contains a 409-xxxxx ASA and a fitting kit. The Meritor Clearance ASA offering (R806019, etc.) feature the ASA and the fitting kit…the ASA itself also features the same part# as the kit (R806019, etc.).

13. 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-95155
Warranty Claims Will Require a Return to ArvinMeritor

14. Identifying Specifications
Clevis Pin Diameter
Arm Length
Spline Size
Spline Count

15. Identifying the Part Number
Part Number Identification

16. Part Number & Date of Manufacturing Identification
Serial Number
Face Plate
Number
Year of Manufactured (4 = 2004)
Week Manufactured (40 = 40th Week)
Part Number