Maintain, diagnose and repair a variety of equipment including diesel engines, transmissions, drive train components, winches, high pressure pumps, centrifugal pumps, air compressors, microprocessor controls, electro-mechanical equipment, hydraulic systems, pneumatic systems, gearboxes, PTO's, 12/24v electrical systems, equipment cabs and controls, chassis and suspension, A/C systems etc. Skill-level requirements vary from basic repairs and preventive maintenance to component replacement with direct and frequent supervision.