AT Brakes
Contents
1. 0334 3 6 Tighten the set screws located in the hub to the appropriate torque for your size unit Size Torque 25 80 in Ibs 55 160 in Ibs 115 275 in lbs 7 Attach the wires to the DC power source using wire nuts or other approved connecting devices Either wire can be connected to the or of the voltage source If a Warner Electric CBC 100 or other Warner Electric control is used as the power source follow the connection diagram supplied with the control Assure that the voltage rating of the brake is the same as the output rating of the power source 8 Your AT brake is now ready for its static test Apply DC voltage to the coil through the brake control The armature should pull against the friction material face with an audi ble click 9 Run the brake under its operating load 4 Warner Electric e 800 825 9050 10 Your AT brake may not achieve its full torque until after a short break in period To break in the brake cycle it on and off under full load at operating speed a mini mum of ten times in quick succession Your AT brake is now ready to run Note Depending on application break in peri od may be longer due to load and RPM and require more cycles Wear Indication Your AT brake should be visually inspected on a periodic basis to determine if the wearing sur faces warrant replacement The friction face and armature should be replaced when the armature reaches the wear indicat2. AT Brakes asia Installation Instructions 819 0334 Warner Electric An Altra Industrial Motion Company Contents The Warner Electric AT brake you have pur Introduction as aa cached eae ween ede do a aus 2 eleSoeies sais 3S319NGA 19 POVOA ond ane trouble free service It is a rugged and durable Brake Installation 3 cs o unit which is rebuildable with both friction face AT Brake Troubleshooting Guide 5 ae Warranty Back Page replacement and complete brake rebuild kits es offered in this service manual The friction face replacement kit renews the friction surfaces while the complete brake rebuild kit includes new bearings Autogap components and ARWEN Failure to follow these hardware in addition to the friction faces instructions may result in product dam o age equipment damage and serious or For friction material replacement refer to manual fatal injury to personnel 819 0341 For complete rebuild refer to manual 819 0325 This service manual includes instructions required for installation troubleshooting informa tion All installation and repair involving AT brakes must be carried out in accordance with the pro cedures specified in the service manual All stat ed or implied manufacturer warranties are void ed if this product is not installed and serviced in accordance with these instructions 2 Warner Electric e 800 825 9050 819 0334 Brake Installation 1 Remove your AT brake
3. RCHANTABILITY OR FITNESS Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state Changes in Dimensions and Specifications All dimensions and specifications shown in Warner Electric catalogs are subject to change without notice Weights do not include weight of boxing for shipment Certified prints will be furnished without charge on request to Warner Electric Warner Electric LLC Warner 31 Industrial Park Road e New Hartford CT 06057 815 389 3771 e Fax 815 389 2582 www warnerelectric com P 218 819 0334 6 05 Printed in USA
4. from its shipping car ton and inspect it thoroughly to ensure that it has arrived in good condition An accessory kit included with your brake contains a coil wire retainer In addition you may have ordered the optional brake torque arm If used install the Warner Electric conduit box or conduit box CBC 100 control combi nation in accordance with instructions fur nished with the conduit box The Warner Electric patented Autogap auto matically adjusts the proper operating gap between the armature and friction face for the life of these components The proper gap is approximately 050 If the armature and friction face have moved during shipment re set the Autogap by pushing the armature against the friction material face Release The armature will spring back about 050 and the proper gap is set Slide the brake onto its shaft over its key If the brake is to be operated in a vertical position it must be mounted with the armature fins up Install the optional Warner Electric torque arm or the customer furnished pin The arm must be strong enough to withstand the brake s full torque capacity and should be affixed to the machine frame and to the brake tangent to its circumference in the notched attach ment point on the back plate It must also be flexible enough to compensate normal shaft and bearing runout without causing binding or side loading to the brake Warner Electric e 800 825 9050 819
5. he terms of this warranty repair or replacement will be made without charge together with a refund for transportation costs If found not to be defective you will be notified and with your consent the item will be repaired or replaced and returned to you at your expense This warranty covers normal use and does not cover damage or defect which results from alteration accident neglect or improper installation operation or maintenance Some states do not allow limitation on how long an implied warranty lasts so the above limitation may not apply to you Warner Electric LLC s obligation under this warranty is limited to the repair or replacement of the defective product and in no event shall Warner Electric LLC be liable for consequential indirect or incidental damages of any kind incurred by reason of the manufacture sale or use of any defective product Warner Electric LLC neither assumes nor authorizes any other person to give any other warranty or to assume any other obligation or liability on its behalf WITH RESPECT TO CONSUMER USE OF THE PRODUCT ANY IMPLIED WARRANTIES WHICH THE CONSUMER MAY HAVE ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL CONSUMER PURCHASE WITH RESPECT TO COMMERCIAL AND INDUSTRIAL USES OF THE PRODUCT THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES WHETHER EXPRESSED OR IMPLIED BY OPERATION OF LAW OR OTHERWISE INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF ME
6. livered to the brake e Adequate Burnishing Unit must be run and cycled a few times to achieve full rated torque e Friction Surfaces Replacement may be required e Friction Surfaces Installation of replacement friction material or armature segments may be incorrect and not allow full contact Clutch Brake Coil Approx Coil Size Voltage Resistance Ohms 25 6 1 4 25 24 20 6 25 90 290 59 6 1 2 55 24 19 6 55 90 230 115 6 1 0 115 24 16 5 115 90 182 Chart 1 Warner Electric e 800 825 9050 819 0334 5 Warranty Warner Electric LLC warrants that it will repair or replace whichever it deems advisable any product manufactured and sold by it which proves to be defective in material or workmanship within a period of one 1 year from the date of original purchase for consumer commercial or industrial use This warranty extends only to the original purchaser and is not transferable or assignable without Warner Electric LLC s prior consent Warranty service can be obtained in the U S A by returning any defective product transportation charges prepaid to the appropriate Warner Electric LLC factory Additional warranty information may be obtained by writing the Customer Satisfaction Department Warner Electric LLC 449 Gardner Street South Beloit Illinois 61080 or by calling 815 389 3771 A purchase receipt or other proof of original purchase will be required before warranty service is rendered lf found defective under t
7. or on the magnet shell If replacement is not made at this time further use will wear into the screw heads making removal and replacement of the friction facing difficult The drawing below illustrates the area to be inspected When the friction surfaces are worn to this point replace with the appropriate friction face replacement kit All of the components needed to refurbish the wearing surfaces of your brake are provided in the replacement kit Wear Indicator Friction Face Armature NE CER SAQA SES N LZ a ASS A ECO ULLE vom 819 0334 AT Brake Troubleshooting Guide If performance problems are present after carefully following the instructions in this manual use the following check list Symptom Check Problem Possible Causes Clutch Rotor will not move or e Coil Resistance engage when power is applied Coil may be open See Chart 1 to the coil e Power Supply Assure proper DC voltage is being delivered to the brake e Airgap If greater than 050 around entire periphery reset Autogap e Autogap Assure that brake armature is free to move on hub spline and releases approxi mately 050 when pressure is removed Vibration e Runout Assure that shaft on which the clutch is mounted doesn t have excessive runout e Shaft Engagement Assure adequate shaft length and diameter engagement in the hub Excessive Start or Stop Times e Power Supply Assure proper DC voltage is being de
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