Olin Engineering Co was founded by Dave Swain in 1975, as a manufacturer of high quality driveline upgrades for mechanical Thomsen and Mayco grout pumps. The driveshaft assembly was guaranteed not to fail for the life of the pump, and when combined with a manifold upgrade, it increased output by up to 50%, by lengthening the drive cylinder stroke. Pistons were changed out to o’ring type, lowering horsepower consumption and increasing useable cylinder length. Oilers were replaced with splash type oil lubrication. Bottom end bearing o’rings were removed, eliminating the necessity to grease the lower end tapered roller bearings…Read more