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

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Meritor Clearance Sensing ASAsFebruary 2005

Meritor Clearance Sensing Automatic Slack Adjusters

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Agenda

• Overview

• Competitive Comparison

• Technical Details and Operation

• Clearance Sensing ASA Interchanges

• Warranty Policy

• Product Specification Identification

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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

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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

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Meritor vs. Haldex Cutaway ComparisonMeritor Haldex

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How Do You Compare vs.…?

7 Lbs. 1 Oz. 7 Lbs. 5 Oz. 7 Lbs. 1 Oz.

Genuine ASA Clearance ASA

High Rotation ForceModerate Rotation

Forece Low Rotation Force

Weight 6 Lbs. 13 Oz. 7 Lbs. 2 Oz. 7 Lbs. 2 Oz.

Manual AdjustmentRequires Pawl

Removal / Pull-Out Low Rotation Force Low Rotation Force

Non-Handed Non-Handed Non-Handed

Installation GuideHand-Held

LocatorBolt-On

Slotted BracketBolt-On

Slotted BracketHand-Held

Locator None ProvidedRigid HandsFree Locator

PackagingHanded &

Non-HandedHanded &

Non-HandedHanded &

Non-Handed

Apply Apply Return

Actuation Type Lift Rod External Bracket External Bracket Lift Rod Lift Rod Lift Rod

Adjustment Stroke Return Return Return

Clearance Clearance Clearance

CrewsonIndustries

System Sensing Design Stroke Clearance Clearance

ArvinMeritor Is the Only Supplier That Can Provide Both Stroke & Clearance Sensing ASA’s

ArvinMeritor Is the Only Supplier That Can Provide Both Stroke & Clearance Sensing ASA’s

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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

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How Does This ASA Work?• Utilizes clearance sensing technology.• Senses excessive drum to lining clearance on the

apply stroke.• Adjusts on the release stroke.

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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.

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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.

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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.

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Clearance Sensing ASA InterchangeMeritor# Haldex ASA# Haldex ASA Kit Meritor# Haldex ASA# Haldex ASA Kit

R806009 409-10658 400-10001 R806016 409-10678 400-10144

R806503 409-10661 400-10002 R806018 409-10680 400-10145

R806502 409-10660 400-10003 R806017 409-10679 400-10146

R806010 409-10659 400-10004 R806002 409-10635 400-10155

R806011 409-10662 400-10005 R806003 409-10648 400-10156

R806025 409-10228 400-10008 R806019 409-10683 400-10211

R806012 409-10663 400-10008 R806013 409-10673 400-10212

R806505 409-10665 400-10040 R806020 409-10684 400-10213

R806504 409-10664 400-10041 R806014 409-10674 400-10214

R806500 409-10599 400-10058 R806021 409-10685 400-10215

R806501 409-10600 400-10059 R806015 409-10675 400-10216

R806507 409-10638 400-10068 R806005 409-10654 400-10304

R806508 409-10639 400-10069 R806006 409-10655 400-10305

R806024 409-10742 400-10140 R806007 409-10656 400-10306

R806004 409-10650 400-10141 R806008 409-10657 400-10307

R806026 409-10653 400-10141 R806001 409-10584 400-10402

R806023 409-10741 400-10142 R806000 409-10129

R806022 409-10733 400-10143 R806506 409-10590

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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

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Identifying Specifications

Clevis PinDiameter

ArmLength

SplineSize

Spline Count

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Identifying the Part Number

Part Number Identification

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Part Number & Date of ManufacturingIdentification

Year of Manufactured(4 = 2004)

Week Manufactured(40 = 40th Week)

Part Number

SerialNumber

FacePlate

Number

Documents

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