CJ TECH

SERVICES PTY LTD

Mobile Heavy Diesel, Plant & Truck Repairs in Warrnambool and South West Victoria

COME SEE US OR WE CAN COME TO YOU

  • Mobile Heavy-Diesel Repairs: On-site troubleshooting and mechanical repairs for all heavy-duty diesel engines.

  • Truck, Trailer & Fleet Servicing: Comprehensive maintenance to keep your commercial fleet compliant and safely on the road.

  • Heavy Plant & Agricultural Machinery Repairs: Expert repairs for tractors, excavators, loaders, and other earthmoving equipment.

  • Auto-Electrical & Wiring Fault Diagnosis: Advanced diagnostics for heavy vehicle auto-electrical systems by experienced technicians.

  • Hydraulic Repairs: Accurate hydraulic testing, fault-finding, and component repairs for heavy machinery.

  • Machinery Air-Conditioning: Servicing, regassing, and repairing HVAC systems in heavy equipment cabins.

  • Preventative Maintenance: Scheduled servicing to identify wear and tear before it results in costly downtime.

  • Emergency Breakdown Assistance: Rapid response mobile plant and truck mechanics to get you back to work quickly.

Who We Are


CJ Tech Services Pty Ltd delivers comprehensive mechanical and electrical support for trucks, heavy plant, agricultural machinery, and commercial fleets through flexible mobile services and fully equipped workshop repairs. Backed by 24/7 emergency breakdown support, advanced diagnostic tools, and a premium field service vehicle, the team minimizes downtime to keep your operations running smoothly.

Our extensive expertise covers major industry brands like Caterpillar, Komatsu, Hitachi, and John Deere. We provide specialized services including hydraulic testing and repairs, cylinder re-sealing, ECM reprogramming, component rebuilds, and comprehensive welding (TIG, MIG, and on-site ARC).

Equipped to handle everything from surface and underground plant maintenance to horse float repairs and planned servicing, our mobile unit brings heavy-duty capability directly to your site. We service a diverse range of assets—from excavators and cranes to conveyors, generators, and pumps—tailoring our solutions to extend equipment lifespan.

Focused on safety, efficiency, and asset value, CJ Tech Services Pty Ltd delivers cost-effective maintenance plans tailored to your specific operational needs. You can rely on our skilled technicians to provide agile, high-quality support that maximizes performance across your entire fleet.


Our Story

Founded in 2018 by skilled mobile plant technician Corey Firth, CJ Tech Services Pty Ltd is built on a lifetime of hands-on mechanical experience. Growing up on a farm in southwest Victoria, Corey spent his youth tinkering with everything from tractors to trailers, sparking a lifelong passion for machinery.

Seeking broader experience, he relocated to Melbourne to complete his apprenticeship before expanding his skills across remote mining sites, underground tunnels, civil construction projects, and the marine industry. Guided by his motto—"If it has wheels or an engine, we can repair it"—he launched CJ Tech Services Pty Ltd in Melbourne’s western suburbs, quickly securing contracts with major corporations in local quarries and civil construction.

Eventually, family ties drew Corey back to the countryside of southwest Victoria. Today, he operates his mobile plant mechanical business from the region, bringing big-industry expertise directly to local communities and maintaining a steadfast commitment to mechanical excellence.

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