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This group performs some or all of the following duties:

• Check bulldozers, cranes, graders and other heavy construction, agricultural, logging and mining equipment for proper performance and inspect equipment to detect faults and malfunctions
• Diagnose faults or malfunctions using computerized and other testing equipment to determine extent of repair required
• Adjust equipment and repair or replace defective parts, components or systems, using hand and power tools
• Test repaired equipment for proper performance and to ensure that work meets manufacturers' specifications
• Clean, lubricate and perform other routine maintenance work on equipment
• Service attachments and working tools such as harvesting and tillage equipment, blades, ploughs, winches and side booms
• May perform repair work on heavy trucks
• May attach components and adjust new farm equipment.

Heavy-duty mechanics may specialize in specific types of machinery such as combines or tracked vehicles, or in engine overhaul, power shift transmissions, fuel injection, hydraulics or electronics.

• Completion of secondary school and training courses or a vocational program is usually required.
• Completion of a three- to five-year apprenticeship program or a combination of over four years of work experience and industry courses in heavy equipment repair is usually required to be eligible for trade certification.
• Heavy-duty equipment technician trade certification is compulsory in Quebec and Alberta and available, but voluntary, in all other provinces and the territories.
• Agricultural equipment technician trade certification is available, but voluntary, in Newfoundland and Labrador, Nova Scotia, Prince Edward Island, New Brunswick, Ontario, Manitoba, Saskatchewan, Alberta and British Columbia.
• Red Seal endorsement is also available to qualified heavy duty equipment technicians and agricultural equipment technicians upon successful completion of the interprovincial Red Seal examination.

• Progression to supervisory positions is possible with experience.
• The Red Seal endorsement allows for interprovincial mobility.

• Construction millwrights and industrial mechanics (7311)
• Motor vehicle diesel engine mechanics (in 7321 Automotive service technicians, truck and bus mechanics and mechanical repairers)
• Supervisors of heavy equipment mechanics (in 7301 Contractors and supervisors, mechanic trades)