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Onspot Tech Tip STRATFORD, Conn. - Performing tire chain maintenance doesn't need much space, nor does it take much time. Onspot, a leading manufacturer of automatic tire chains, offers some quick and easy suggestions on how to check those chains in what shouldn't require more than 100 feet and 30 seconds. The check can be done in a parking lot or on the street. Company president Patrick Freyer recommends Onspot tire chain owners check their systems once a week. Follow three simple procedures when performing the check: start the vehicle; move forward at a speed ranging from 3 to 5 mph and turn on the chains; and count to five and turn the chains off. Check observations: The chains should go down and pass between the tire and road service. On a dry surface, the operator should be able to feel the chains under the tire. Keep in mind that at slow speeds the "footprint" coverage will not be 100 percent. The chains should retract up out of the way when turned off and the chains should not be dragging on the ground in the resting position. On vehicles with a 12-volt air compressor, the operator should be able to hear the compressor running once the chains have been retracted. The operator may need to turn the chains on a second time in order to get the compressor to come on. By following this procedure, operators have checked the dash switch, solenoid, arm bearings, cylinders, chainwheel bearings, air lines and fittings, and the air compressor system if the Onspot tire chains are equipped with the feature. Source: School Bus Technician, September, 1999
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