Modern Tire Dealer

DEC 2018

Magazine for the professional tire industry

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75 w w w . M o d e r n T i r e D e a l e r . c o m All new Conti Coach HA3 tires readily pair with any of our digital tire monitoring solutions. Commercial Vehicle Tires | www.continental-truck.com ** Based upon "Technology & Maintenance Council's S.2 Tire & Wheel Study Group Information Report: 2010-2 Issued: June 2010". All due to proper tire inflation! *Also Available with Telematics Integrations Conti Connect® & Conti PressureCheck® * Eliminate manual tire pressure checks Up to 25% longer tread life ** Up to 1% increase in fuel efficiency ** Up to $600 - $800 in annual savings ** First Complete Tire Line in the Industry with Embedded TPMS Sensors Look for the Active Sensor Mark WITH CONTINENTAL, THE FUTURE STARTS EARLIER When the tires are inflated to the recom- mended inflation pressure, the tire is able to develop the proper footprint. ■ James Tuschner has spent 25 years in the tire industry, primarily focused on the agricultural and specialty tire markets. His experience includes time spent at Alliance Tire Americas Inc. (first as director of marketing, then as director of business development) and Denman Tire Corp. He started www.agtiretalk.com in 2016. axle and rear axle weights are known, we can use the tire inflation tables to look up the minimum inflation pressure required to carry the load. In this example, the front tires were 420/90R30 used as singles. e minimum inflation pressure to carry the 9,370 lbs. is 17 psi. e rear tires were 480/80R46 used as duals. e minimum inflation pressure to carry the 15,500 lbs. is 12 psi. Step ree: Calculate the recommended front and rear axle weight splits. e weight split is based on the tractor type and how the tractor is being used. Example tractor weight splits: front axle, 23,400 lbs. x 0.35 = 8,190 lbs.; rear axle, 23,400 lbs. x 0.65 = 15,210 lbs. (see Chart 2). CHART 2: RECOMMENDED AXLE WEIGHT SPLITS Tractor type Weight Split Front Axle Rear Axle 2WD 25% 75% MFWD (Draw Bar) 35% 65% MFWD (3-Point Hitch) 40% 60% 4WD 51 - 55% 45 - 49% Target weight splits according to stan- dard industry practices. Keep in mind these are all target weight splits with no equipment mounted to the trac- tor. If 3-point equipment is being used, make sure there is enough weight on the front axle of the tractor to keep the front axle on the ground. SOURCE: BRIDGESTONE AMERICAS TIRE OPERATIONS Step Four: Weigh the tractor. e most accurate way to find the weight is to use a scale. When weighing a tractor, make sure all the fluids are topped off, especially the fuel tank. If for some reason the tractor cannot be weighed, please consult your operator manual or your equipment dealership. Example tractor weighed with portable scales: front axle, 10,150 lbs.; rear axle, 15,500 lbs. Step Five: Add or remove weight. In most cases a tractor cannot be ballasted to the exact target weight outlined in Chart 2. In the example, the target front axle weight is 8,190 lbs., but it weighed 10,150 lbs. Let's assume the example tractor has six front suitcase weights. Since the front axle weight is heavier than the target weight, we would remove the suitcase weight and re-weigh the front axle. Even though the suitcase weights are 100 lbs., they add 130 lbs. to the front axle because the weights are in front of the axle. When the weights are removed, the tractor is weighed and the new front axle weight is 9,370 lbs. Step Six: Set the inflation pressure of the front and rear tires. Now that the front

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