McCarthy Diesel & Plant is a family-owned and operated business providing expert heavy vehicle and plant repair, maintenance, and fabrication services across the Hunter Valley and surrounding regions. We specialise in delivering efficient and reliable solutions that keep machinery performing at its best, reducing downtime and maximising productivity for our clients. Our experienced team combines technical expertise with a strong commitment to safety, precision, and quality workmanship. From welding and fabrication to mobile line boring and heavy plant servicing, we offer tailored support for construction, mining, and civil operations. We take pride in maintaining strong, long-term client relationships built on trust, transparency, and consistent results.