Trotter Manufacturing is one of the largest producers of hydraulic valve spools in the United States. It serves off-highway equipment manufacturers. The company works with a team of more than 75 staff members. Founded in 1985, Trotter Manufacturing has achieved ISO 9002 certification. It features a laboratory that is equipped with the technology that has the capability to measure dimensions to various measures. The company provides grinding, buffing, bead blasting and machining solutions. Trotter Manufacturing also has reaming, burnishing and gun drilling capabilities. Its products control the restriction and flow of high-pressure oil in hydraulic cylinder valves used for tractor and construction equipment lines.