Have a case3430 air cart One of the meter rollers stops turning Electric motor working fine

Most likely the meter is binding in the housing. Empty the tank and remove and clean the meter. There is a plastic piece below the meter on the bottom half of the housing that can get pushed up from fertilizer buildup/corrosion. Also check the bearings on the meter. Otherwise check the meter speed sensor and the hydraulic system. I removed the small in line filters on mine as newer carts didn't even put them on.