with hydraulic variable speed drives in a variety of positions. Twenty-two years with Nelson Liquid Drive in purchasing management, manufacturing, customer service and after sales... trouble shooting support. Thorough knowledge of design, repairs and maintenance associated with the American Blower/American Standard and Nelson Liquid Drive product line. John... Since 1983, a career in the manufacturing, testing and trouble shooting of variable speed Fluid Drives. Associated with Nelson Liquid Drive for five years as a lead mechanic...