Diagnose, repair, and maintain heavy equipment such as excavators, loaders, bulldozers, graders, cranes, and diesel generators Perform servicing, overhauling, and preventive maintenance of diesel engines and hydraulic systems Understand and work on hydraulic basics including pressure, flow, pumps, valves, hoses, cylinders, and filtration systems Identify and rectify mechanical, hydraulic, and basic electrical faults using diagnostic tools Follow preventive maintenance schedules and safety procedures to maximize equipment uptime Maintain service and maintenance records and report major breakdowns to supervisors