3What Does An ASA Do?ASA’s Eliminate The Need For Constant Manual Brake AdjustmentProvide Better Balance Between Individual BrakesInsures The Braking Stroke Is Maintained Within The Recommended Or Legal LimitsMinimize Loss Of Braking Performance
4Meritor Clearance Sensing ASA Direct Replacement For HaldexSame Fit, Form, and FunctionIdentical Components55 Different ASA’s in ProgramAvailable via MeritorCompetitively PricedShipment Starting on 1/17/05Aftermarket Only, No Spec OrdersThe Genuine Haldex ASA is Still Available via EuclidThe Genuine Meritor stroke sensing ASA is Still Available via Euclid & Meritor
6How 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
7How Does This ASA Work? The Clearance Is Adjusted When: Excess Clearance Exists Between the Brake Shoes and DrumsOccurs with Normal Wear in the foundation brakeThe ASA will rotate to the necessary position to eliminate the clearanceWhat Occurs Inside the ASA:Inside the ASA are a number of components that maintain a pre-set running clearance or gapThe control arm is fixed to the anchor bracketThe toe of the control arm touches a notch in the control diskThe depth of this notch is the key factor that maintains the gap
8How Does This ASA Work? Utilizes clearance sensing technology. Senses excessive drum to lining clearance on theapply stroke.Adjusts on the release stroke.
9How 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.
10How 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.
11How 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.
12Clearance Sensing ASA Interchange Meritor#Haldex ASA#Haldex ASA KitR806009R806016R806503R806018R806502R806017R806010R806002R806011R806003R806025R806019R806012R806013R806505R806020R806504R806014R806500R806021R806501R806015R806507R806005R806508R806006R806024R806007R806004R806008R806026R806001R806023R806000R806022R806506Haldex 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.).
13Warranty Policy On-Highway & Linehaul Applications 5 Years or 500,000 MilesSevere Service* Applications2 Years or 100,000 Miles* As Defined by the 2005 ArvinMeritor Warranty Book SP-95155Warranty Claims Will Require a Return to ArvinMeritor