Heavy Vehicle & Plant Repair
Plant repairs, field service, diagnostics, servicing, maintenance and component overhauls for heavy vehicles and machinery.
McCarthy Diesel & Plant provides services to Heavy Vehicles, Plant and Machinery across NSW. We are a family owned and operated business that has a core focus on good client relationships.
Plant repairs, field service, diagnostics, servicing, maintenance and component overhauls for heavy vehicles and machinery.
Custom fabrication, repairs, modifications and durable welding work for heavy equipment and attachments.
Mobile line boring and onsite machining solutions for worn bores plus heavy machinery repairs and restoration work.
From repairing complex heavy equipment components to designing and constructing custom plant equipment, our mechanics bring the experience and skill to handle it all. Every custom part and component we produce is built to exact specifications, so you can trust that it will fit perfectly, perform optimally, and stand up to the demands of the job — all delivered with the precision and quality assurance we are known for.
Our experienced team of mechanics offer a complete range of Maintenance & Repair Services across a variety of equipment ranging from small pumps through to agricultural, construction and mining equipment. These services include:
With fully mobile line boring capabilities, our team can attend your site and deliver precision on-site machining across a broad range of applications. Whether it's repairing worn bores on heavy machinery, carrying out industrial equipment maintenance, or supporting custom fabrication projects, we have the equipment and expertise to get the job done where it's needed most — reducing transport costs and minimising downtime across your operations.



We can provide quality DOZCO product solutions across three core categories:
Hydraulic breakers for demolition, quarrying, trenching and civil works. Range suited from compact machines to larger carriers.
Moil points, blunt tools, wedges and conical chisels for multiple applications and demanding work environments.
Track chains, rollers, idlers, sprockets, segments, guards and more for excavators and dozers.
From our start as Hunter Rail & Civil, we evolved into McCarthy Diesel & Plant and have since grown into one of the Hunter's preferred providers for Heavy Vehicle & Plant Repairs and Fabrication & Maintenance. Led by Managing Director Nathan Parfoot — who brings over 15 years of industry experience — we have continued to grow and evolve since our founding in 2016.
Our strength lies in our people. Our family of Plant Mechanics, Heavy Vehicle Mechanics, Boilermakers, Plant Operators and Administrative staff each bring a unique skillset; working together to deliver consistently high quality across every job. We're small but growing, experienced but agile, and fully equipped with the skills, resources and management to handle projects of all types and sizes. We invest in creating a positive workplace because we know that a happy, motivated team is what drives great outcomes for our clients.
Safety is at the heart of everything we do. We treat our staff, contractors and members of the public like family, and we are fiercely determined to maintain a safe, professional culture across all of our work. Reducing and preventing incidents isn't just a priority — it's how we protect our people and deliver work efficiently, every time.
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