Within 250 Miles of Houston, TX
Within 250 miles of San Antonio, TX
Within 250 Miles of Houston, TX
Within 250 miles of San Antonio, TX
Keeping Your Jobsite Moving. Minimizing Downtime. Maximizing Performance.
When heavy equipment goes down, your entire project is at risk. OnSite Diesel delivers fast, expert mobile field service, heavy machinery repair, line boring, welding, and full-service shop repairs — backed by technicians who don’t leave the jobsite until the work is done right.
We service contractors, fleet managers, industrial operations, and owner-operators who rely on uptime, performance, and trusted repair partners.
When equipment breaks down on the job, we bring the solution directly to you. Our fully equipped service trucks arrive ready to diagnose issues, repair diesel engines, service hydraulic systems, replace components, and perform on-site welding and precision line boring. Contractors and fleet managers choose us because we reduce downtime, eliminate towing costs, and stay until the machine is back in working order.
For major repairs, rebuilds, and complex machining, our Willis, TX shop provides comprehensive heavy equipment and diesel engine service. We handle engine and component rebuilds, hydraulic repairs, undercarriage work, fabrication, and in-shop welding and line boring. With the right tooling, controlled environment, and experienced technicians, we restore equipment performance and extend machine life.
Stay ahead of unexpected failures with a heavy equipment maintenance partner that understands the demands of your machinery. We provide routine inspections, fluid and filter service, wear-part replacement, and multi-unit fleet maintenance programs—available on your jobsite or in our shop. Our preventive approach includes identifying early wear patterns and correcting them with welding or line boring before they lead to costly breakdowns.
When equipment breaks down on the job, we bring the solution directly to you. Our fully equipped service trucks arrive ready to diagnose issues, repair diesel engines, service hydraulic systems, replace components, and perform on-site welding and precision line boring. Contractors and fleet managers choose us because we reduce downtime, eliminate towing costs, and stay until the machine is back in working order.
Our Transportation Worker Identification Credential (TWIC) certification allows our team to access secure maritime facilities and restricted areas, ensuring we can safely and legally service equipment in ports and similar environments.
With MSHA certification, our technicians are trained to work safely in mining environments and support operators with compliant, high-quality heavy equipment service.
We arrive with the tools, diagnostics, welding rigs, and line boring equipment needed to fix most issues on the first visit, reducing downtime and eliminating costly hauling.
From engine troubleshooting to structural welding and precision bore repair, our specialists handle the complex work other shops can’t.
Contractors and fleet managers rely on us across Southeast Texas for fast dispatch and reliable turnaround times.
We service a full range of heavy equipment, from construction machinery and forklifts to mining and quarry equipment, and we keep your machines running when your project depends on reliable performance. Most importantly, we stand by our commitment to stay on site until the repair is complete. We don’t hang up our hats until you say it’s quittin’ time.
Heavy equipment repair doesn’t wait — and neither do we. Whether you need field service, shop repairs, preventative maintenance, or emergency service, our technicians are ready to help you keep your project moving.
