At MJD Mechanical Service, we offer repair and maintenance services for all types of heavy machinery. Our team of experienced diesel mechanics is dedicated to ensuring that your equipment runs smoothly and efficiently, minimizing downtime and maximizing productivity. We understand that time is money in the heavy machinery industry, which is why field service is a priority for our business, allowing us to continue to support our clients in Toowoomba City and the surrounding areas.


Whether you need routine maintenance or breakdown response, we’ve got you covered. Our services include earthmoving component rebuilds, scheduled machinery OEM rebuilds, and scheduled servicing. We pride ourselves on providing prompt and reliable service. At MJD Mechanical Service, we understand the importance of keeping your heavy machinery in top condition, and we’re committed to providing the highest quality service to our clients.