Job Description

Heavy Duty Diesel Mechanic

Under general supervision the Heavy-Duty Equipment Mechanic assigned to the Fleet Operations Division of the General Services Department will perform duties related to the preventative maintenance, repair, and overhaul of the City's medium/heavy duty trucks, on/off road equipment, including but not limited to emergency vehicles, park maintenance equipment, construction equipment, and generators (both stationary and mobile). Work is performed on vehicles and equipment that is owned by the City of Detroit.

Examples of Duties

• Follow all safety procedures within local, state, and federal guidelines.
• Ensure a clean and safe work environment.
• Operate a variety of hand tools, power tools, and diagnostic equipment such as computerized diagnostic devices and engine analyzers.
• Staying up to date with continual education and new technology.
• Participation in training sessions, workshops, & courses to manage and advance skills.
• Recommend preventive maintenance for equipment to ensure optimal performance and reduce down time.
• Preventative maintenance shall include but is not limited to checking and changing oil and filters, lubing and greasing specified areas, checking fluids, inspecting & adjusting brakes and steering.
• Inspect parts for wear and damage.
• Repair or replace faulty parts, including engines, transmissions, brakes, steering, wheel bearings, and electrical components.
• Repair or replace components on winches such as cables, ropes, and gears.
• Repair, replace, install, and overhaul on/off road equipment, medium/heavy duty trucks, and related component parts such as diesel, gasoline, electric, alternative fuel engines, carburetors, fuel injection systems, transmissions, hydraulic, and electrical systems.
• Maintaining and repairs of hydraulic pumps, pneumatics, reservoirs, actuators, hoses, pumps, valves, and controls.
• Repair and maintenance of motors shall include but is not limited to hoses, cylinders, power sources, accumulators, relief valves.
• Maintenance of after-treatment components shall include but are not limited to diagnostic and repair of diesel oxidation catalyst (DOC), diesel particulate filter(DPF), diesel exhaust fluid injection(DEF), and selective catalyst reduction (SCR).
• Repair and maintenance of braking systems shall include but are not limited to (air) compressors, brake chambers, drums, slack adjusters, dryers, air tank, foot valves, brake lines, safety valves, master cylinder, wheel cylinder, rotors, brakes boosters, calipers, and related sensors.
• Diagnose mechanical and emissions failures shall include but are not limited to pumps, converters, air circulation systems, either visually or by using electronic testing instruments.
• Repairing and rebuilding of engines shall include but are not limited to replacing head gaskets, water pumps, and vacuum pumps.
• Repair of differentials and drive systems shall include but are not limited to axles, tandem axles, jake brake, seals, and bearing.
• Repairs and maintenance of fuel injection systems shall include but are not limited to injectors, filters, tanks, lines, sensors, engine valves, pumps, and other major heavy equipment components.

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