Trade · ONET 49-3042.00
Heavy Equipment Mechanic
Services construction, mining, agricultural, and material-handling machinery.
What the work looks like
Heavy-equipment techs work on dozers, excavators, loaders, backhoes, off-highway trucks, combines, and forklifts. Dealer techs specialize by manufacturer (Caterpillar, John Deere, Komatsu, Volvo CE); field service techs drive to job sites with a service truck. The work mixes diesel engine repair, hydraulic system diagnostics, drivetrain service, undercarriage repair, and increasingly sophisticated machine-control and telematics systems.
Physical demands
- Heavy lifting (hydraulic cylinders, drive components)
- Outdoor field service work in all weather
- Working in pits and under jacked-up equipment
- Exposure to hydraulic oil, diesel fuel, grease
- Travel to remote job sites
Common tools
- Service truck with air compressor and welder
- Torque multiplier (large fasteners)
- Hydraulic pressure gauges and flow testers
- Scan tool (Cat ET, Deere Service Advisor, JPRO)
- Infrared thermometer
- Jacks, cribbing, and rigging for field work
Union and non-union paths
Public sector and some large fleet operations are unionized (IUOE, IAM, AFSCME). Dealer and private rental fleet work is largely non-union. Dealer techs often enjoy strong factory training pipelines regardless of union status.
How to enter
Entry routes include manufacturer-partnered programs at community colleges (Cat ThinkBIG, Deere Ag Tech), military heavy-equipment MOSs, and direct hire as a lube tech. ASE Medium/Heavy Truck certs transfer partially; manufacturer certifications (Caterpillar Factory, Deere Advanced) are the distinguishing credential in most dealer networks. CDL is valuable for moving equipment.
Specialty paths in this trade
Most states license one heavy equipment mechanic classification, but the work splits into distinct paths with different schedules, tools, and wage schedules. Read before choosing a program.
Dealer Line Tech
Shop-based technician at a Caterpillar, Deere, Komatsu, Volvo, or Case New Holland dealer. Works the repair bay on customer-owned and dealer-rental iron under factory warranty and service procedures.
Typical scope
- Engine, transmission, and final-drive rebuilds in the shop
- Warranty diagnostics against OEM flowcharts and scan tools
- Planned-maintenance services (500, 1000, 2000 hour intervals)
- Component R&R with overhead cranes and shop presses
Entry: OEM-partnered community college program (Cat ThinkBIG, Deere Tech, Komatsu ACT, Volvo SteP, Case New Holland TECH) or direct dealer hire into a lube-tech spot with ladder to line tech.
Wage note: Dealer flat-rate or hourly varies by region and OEM. Factory-certified techs typically sit toward the top of the dealer schedule.
Field Service Tech (Mobile Road Call)
Runs a dealer or independent service truck to customer job sites. Troubleshoots in the dirt, makes running repairs, and hauls components back to the shop when the job is bigger than the truck.
Typical scope
- On-site diagnostics with laptop and OEM software
- Hose, cylinder, and hydraulic pump swaps in the field
- Emergency breakdown response on active job sites
- Scheduled PM runs across a territory
Entry: Typically a progression from dealer line tech after factory-certification milestones. CDL strongly preferred; some fleets require it for the service truck itself.
Wage note: Field techs commonly earn a premium over line techs via on-call pay, windshield time, and truck allowance. Overtime on breakdown calls is routine.
Component Rebuild Tech
Specializes in engine, transmission, torque-converter, differential, and final-drive rebuilds at a regional component shop or dealer remanufacturing center. Bench-heavy work with tight tolerances.
Typical scope
- Diesel engine teardown, measurement, and reassembly to OEM specs
- Powershift and hydrostatic transmission rebuilds
- Final drive, planetary, and torque-converter work
- Dynamometer testing and break-in runs
Entry: Usually reached after several years as a dealer line tech plus OEM component-specific training. Some remanufacturing centers hire directly from diesel-tech programs.
Wage note: Component work is typically hourly with performance pay tied to warranty rework rates. Less weather exposure than field work.
Hydraulics Specialist
Deep specialization in hydraulic systems: pumps, valves, cylinders, pilot circuits, and electro-hydraulic controls. Writes the diagnostic calls other techs can't close.
Typical scope
- Flow and pressure testing with portable test stands
- Load-sensing and electro-hydraulic valve calibration
- Cylinder rebuild and seal kit service
- Contamination control and system flushing
Entry: Build through OEM hydraulics courses (Cat, Deere, Komatsu) plus International Fluid Power Society (IFPS) certifications. Some techs route through mobile-hydraulics shops rather than dealers.
Wage note: Hydraulics specialists frequently earn above the line-tech schedule at the same dealer. Independent hydraulic shops pay competitively for experienced techs.
Machine-Control / Grade-Tech
Installs, calibrates, and troubleshoots GPS and total-station machine-control systems (Trimble, Topcon, Leica) on dozers, graders, excavators, and pavers. A growing specialty as grade-control saturates earthwork contractors.
Typical scope
- Mast, receiver, and sensor installs on dozers and graders
- Calibration to survey control and benchmark validation
- Base-station and rover troubleshooting
- Operator training on machine-control UIs
Entry: Trimble or Topcon factory certification plus prior heavy-equipment or survey experience. Many grade-techs come from dealer service departments or survey crews.
Wage note: Machine-control specialists are in short supply and commonly paid above a standard dealer line tech. Role may include significant travel across a region.
Residential, commercial, industrial
Heavy-equipment work does not split residential vs commercial the way the building trades do. The real split is where the wrench turns: dealer shop, field service, in-house fleet, or rental yard. The same license doesn't exist either; credentialing is OEM-driven rather than state-licensed.
Certifications that unlock premium work
Credentials beyond the state license. Each one opens a specific segment of work where the qualified pool is smaller.
Caterpillar ThinkBIG ↗
Two-year AAS program co-delivered by Caterpillar and partner community colleges, alternating semesters with paid dealer internships. Graduates enter Cat dealers as factory-trained techs with a clear ladder to senior and field-service roles.
Issuer: Caterpillar Inc. and partner colleges
John Deere Tech Program ↗
Two-year AAS with alternating Deere dealer internships. Deere Ag Tech and Deere Construction & Forestry Tech tracks feed directly into dealer networks with factory certifications.
Issuer: John Deere and partner colleges
Komatsu Advanced Career Training (ACT) ↗
Komatsu's factory-sponsored AAS pathway at partner colleges with paid dealer internships. Graduates enter Komatsu dealers with factory credentials on construction and mining equipment.
Issuer: Komatsu America and partner colleges
Volvo SteP (Service Technician Education Program) ↗
Volvo Construction Equipment's factory training pathway through partner colleges. Students alternate classroom and Volvo dealer internships, graduating as factory-trained techs on Volvo articulated trucks, excavators, and wheel loaders.
Issuer: Volvo Construction Equipment
Case New Holland TECH Program ↗
CNH Industrial's technician training pathway for Case Construction and New Holland dealers. AAS-level program with paid internships, leading to factory certification on Case and New Holland iron.
Issuer: CNH Industrial
AEMP Certified Equipment Manager (CEM) and Certified Equipment Support Professional (CESP) ↗
Association of Equipment Management Professionals credentials for fleet managers and senior shop leads. CEM is the fleet-manager credential; CESP targets shop foremen and service managers. Commonly requested for in-house fleet and rental-yard leadership roles.
Issuer: Association of Equipment Management Professionals (AEMP)
ASE T-Series (Medium/Heavy Truck) ↗
ASE's Medium/Heavy Truck test series (T1-T8) overlaps with heavy-equipment skills in diesel engines, drivetrains, brakes, and electrical. Useful for techs moving between on-highway truck and off-highway equipment work, and a baseline credential at many municipal fleets.
Issuer: National Institute for Automotive Service Excellence (ASE)
OSHA 10 and OSHA 30 (Construction) ↗
OSHA 10 is the entry-level construction safety card commonly required for site access; OSHA 30 is the supervisor-level card. Most general contractors and mining operations require at least OSHA 10 before a field tech can badge onto a job site.
Issuer: OSHA-authorized outreach trainers
AWS Welding Qualification (Structural or Fabrication) ↗
Heavy-equipment repair routinely involves fabrication and structural welding on buckets, booms, frames, and undercarriage components. An AWS-qualified welding credential (D1.1 structural or relevant procedure qualification) expands the scope of field repairs a tech is permitted to perform.
Issuer: American Welding Society (AWS)
Trimble or Topcon Machine-Control Certification ↗
Factory certification from Trimble (SiteWorks, Earthworks) or Topcon (3D-MC) qualifies a tech to install, calibrate, and service GPS and total-station grade-control systems. The prerequisite credential for machine-control / grade-tech roles.
Issuer: Trimble and Topcon Positioning Systems
Tool and equipment investment
Apprentice, year 1
$5,000 to $10,000 for a full mechanics kit: roll-away box, metric and SAE sockets up to 1-1/2 inch, torque wrenches across the range, air tools, and specialty pullers. The starter investment runs higher than auto or light-truck work because heavy-equipment fasteners and components demand larger, heavier tools.
Journey level
$20,000 to $50,000 over time for a full journey-level box: a large roll-cab with a top chest, a laptop loaded with OEM software (Cat ET, Deere Service Advisor, Komatsu CSS), hydraulic pressure and flow test kits, borescope, dial indicators, micrometers, large torque multipliers, and OEM-specific specialty tools. Most dealers supply the heaviest gear (overhead cranes, presses, track presses, dyno).
Going independent
$150,000 to $400,000 to set up a mobile service operation: a service truck with crane service body, onboard air compressor and welder, transmission jack or lift, component-specific specialty tooling, hydraulic test cart, and shop-grade diagnostic laptops and OEM software subscriptions. Insurance, bonding, and OEM parts accounts add more before the first invoice. Mining and forestry territories sit at the top of the range.
Tool-ownership expectations vary by employer. Dealers commonly supply the heaviest shop equipment and OEM software; the tech owns the hand tools, box, and many specialty tools. Ask during hiring which tools the employer provides and which come out of your pocket.
Wages
National median
$63,980
annual, all workers
National mean
$67,580
annual, all workers
By pilot state
BLS OOH covers heavy-vehicle and mobile-equipment service technicians. Demand tracks construction activity, mining, and agriculture cycles; automation and electrification of the equipment fleet is rapidly reshaping skill requirements.
BLS OES 49-3042 (Mobile Heavy Equipment Mechanics, Except Engines) publishes state and metro median and mean wage data. Regional variance is sharp: mining-heavy metros (Elko NV, Gillette WY, parts of AK) and major construction metros commonly sit well above the national median, while rural and low-construction regions sit below. Agriculture-dominant regions show different seasonal patterns than construction-dominant regions. Check the BLS OES 49-3042 metropolitan tables for your target area before relocating. Source: BLS OES by area, https://www.bls.gov/oes/current/oes493042.htm.