See Heavy Equipment Mechanic 1.

Performs a full range of maintenance and repair activities, diagnostic procedures, and fabrication activities on heavy (greater than 26,000 GVWR) and construction (on-and off-road) vehicles and equipment. This may include mechanic work on marine vessels as part of a larger, heavy fleet.

This is the journey level of the series. The work at this level is planned and unplanned and may be completed in the shop or in the field. Uses considerable independent judgment in making decisions.

Performs a full spectrum of mechanic duties on heavy vehicles and equipment working in a shop or in the field; diagnoses problems, disassembles units, repairs, or replaces parts, and reassembles units.

Diagnoses, services, and repairs various systems that are found on heavy equipment such as mechanical and computer electronic controls, air brake systems, transmissions, computer controlled automatic and manual transmissions, high voltage generators, propane powered equipment, and pneumatic systems;

Repairs and services track drive sprockets, rails, idler wheels, hard bars, track adjusters, hydraulic reversers, final drives, brake bands, steering clutches and hydrostatic transmissions.

Fabricates, modifies, and installs special equipment or replacement parts.

Designs and fabricates mechanical apparatus such as truck mounted tanks, battery holders, toolboxes, utility bodies, snowplows and mounting brackets for lights and signs; designs, lays out and orders appropriate materials; welds sections together and mounts apparatus, shields, deflectors, protective and safety access improvements on equipment; calibrates mechanical and computer electronic controls to ensure apparatus operates effectively.

Performs routine scheduled and unscheduled maintenance checks and adjustments on fluid levels, hoses, belts, brakes, tires, and clutches; changes filters and oil, and lubricates vehicles and motor driven equipment.

Services, diagnoses, repairs, and maintains speed tandem drive axles with air or electric shift, hydrostatic driven, heavy-duty multi-axle suspensions, both conventional steel and air springs.

Repairs, rebuilds, replaces, or restores remote and direct controlled electronic, pneumatic, hydraulic control systems for stationary and mobile equipment;

Inspects, repairs, rebuilds, replaces, or restores pneumatic and hydraulic brake systems, brake shoes, pads, drums, hoses, calipers, cylinders, and any heavy-duty air brake systems.

Diagnoses, repairs, and replaces various power train and propulsion systems, drive shaft, differential, axle, manual, automatic and sophisticated computer-controlled transmissions, clutches, transfer cases, power take-off systems, transmission reversers, all-wheel drive steering axles, and final drives.

Repairs, rebuilds, replaces, or restores electrical systems (high and low voltage), batteries, lights, instruments, warning devices, controls and switches, computer controls, modules, alternators, starters, and defective cables, and wiring; includes 12 and 24-volt systems.

Repairs or replaces hydraulic pumps, hoses, valves, winches, and cylinders.

Repairs or replaces air compressors, air dryers, brake valves, air tanks, and hoses.

Performs engine overhauls, replaces engines, and rebuilds components.

Repairs, rebuilds, replaces, or restores chassis and component parts.

Placeholder for marine vessel typical work description.

Placeholder for fire apparatus typical work description.

Troubleshoots and determine the cause and extent of component or system failure through industry standards of diagnostics or trouble-shooting procedures and logic, test drives, pressure and temperature checks, uses disassembly, inspection, computerized and electronic diagnostic equipment, and reference to technical manuals, blueprints, and schematic manuals.

Performs other duties as assigned.

Knowledge of: standard practices, materials, tools, and equipment used in the repair and maintenance of motor vehicles and engines; safety issues in the use of tools, equipment, and supplies used in repair of motorized vehicles and equipment; body and frame construction.

Ability to: diagnose mechanical, electrical and hydraulic malfunctions; read manuals and schematics; rebuild engines and major driveline components; communicate with other mechanics about repair work needed; enter repair information in fleet maintenance management software; lead, mentor, assist, and teach employees.

There may be instances where individual positions must have additional licenses or certification. It is the employer’s responsibility to ensure the appropriate licenses/certifications are obtained for each position.

Persons legally authorized to work in the U.S. under federal law, including Deferred Action for Childhood Arrivals recipients, are eligible for employment unless prohibited by other state or federal law.

Three years of experience repairing and maintaining heavy equipment OR four years of experience assisting skilled trades people in the repair and maintenance of heavy equipment. Successful completion of relevant vocational technical training in heavy equipment may substitute year for year for experience. Equivalent education and/or training may substitute for experience.

Some positions may require a Commercial Driver’s License.

Equivalent education/experience.

Establish new job classification; range 60G; adopted June 23, 2025, effective July 1, 2025.