Fast Heavy Equipment Diagnostic

When a machine goes down, every hour matters. At 704 Diesel & Welding Services, we provide heavy equipment diagnostic services that help you find the real problem fast, so you can avoid wasted time, repeat repairs, and costly downtime. We work on diesel-powered equipment in the field and in our shop, serving customers within 50 miles of Marshville, NC, including much of the Charlotte area and nearby parts of North and South Carolina.

Heavy equipment problems are not always easy to spot. A warning light, hard start, loss of power, hydraulic issue, electrical fault, overheating problem, or strange noise can all point to different root causes. That is why we take a hands-on, step-by-step approach. We do not guess and start changing parts. We inspect the machine, test key systems, and use real diagnostic methods to narrow down the issue and identify what is actually causing the failure.

What our heavy equipment diagnostic service includes

Our diagnostic process is built to help owners, operators, and fleet managers make smart repair decisions. Depending on the machine and the symptoms, our service may include:

• Visual inspection of the machine and affected system
• Checking active and stored fault codes
• Electrical system testing, including batteries, charging, wiring, connectors, sensors, and grounds
• Diesel engine performance checks
• Starting and charging system diagnosis
• Fuel system troubleshooting
• Cooling system checks for overheating or pressure issues
• Hydraulic system problem identification
• Inspection for leaks, damaged components, loose hardware, and abnormal wear
• Evaluation of no-start, hard-start, low-power, shutdown, derate, and intermittent running issues

We also look at the full picture. In many cases, one failure causes another. A weak battery can create false electrical symptoms. A bad sensor can make it seem like a larger engine issue. A wiring problem can mimic a failed component. Our goal is to help you avoid misdiagnosis and get a clear path forward.

Equipment we diagnose

We diagnose many types of heavy equipment and diesel-powered machinery used in construction, agriculture, site work, trucking, and industrial applications. This can include excavators, skid steers, loaders, dozers, backhoes, tractors, compact equipment, service trucks, and other diesel equipment. If you are not sure whether your machine falls within our scope, just give us a call and tell us what you have going on.

Common issues we help diagnose

Customers call us for a wide range of equipment problems. Some of the most common include:

• Engine will not start or cranks but will not fire
• Loss of power under load
• Machine shuts down unexpectedly
• Check engine lights or fault code warnings
• Overheating during operation
• Hydraulic functions acting slow or weak
• Battery drain or charging issues
• Fuel delivery and injector-related symptoms
• Electrical shorts, blown fuses, or communication faults
• Intermittent problems that are hard to reproduce

These kinds of issues can get worse if they are ignored. Early diagnostic work can help catch problems before they lead to major breakdowns, damaged components, or expensive emergency repairs.

Mobile and in-shop diagnostic service

One of the biggest advantages we offer is flexibility. At 704 Diesel & Welding Services, we provide mobile heavy equipment diagnostics at your job site when possible, which can save you the hassle and cost of transporting a disabled machine. If the issue calls for a deeper repair process, we can also handle service in our shop. We will always be straight with you about what makes the most sense for your equipment, timeline, and budget.

For contractors and equipment owners, mobile service can be a major benefit. If your excavator, skid steer, loader, or other machine is stuck on-site, we can come out, inspect the issue, and help you understand the next step. That means less downtime and faster decisions.

Why proper diagnosis matters

A good repair starts with a good diagnosis. If the root problem is missed, the same issue can come back again and again. That leads to more downtime, more labor, and more money spent on parts you may not have needed in the first place. We believe in diagnosing equipment the right way the first time.

When we diagnose your machine, we focus on accuracy, safety, and practical repair planning. We want you to know what failed, what could be affected, and what options you have. That gives you the information you need to decide whether to repair now, schedule service later, or prepare for additional maintenance.

Who we work with

We work with equipment owners, contractors, farmers, small fleets, and businesses that depend on diesel-powered machinery to stay productive. If your equipment is essential to your daily work, fast and reliable troubleshooting matters. We understand that downtime affects schedules, labor, customer commitments, and revenue. That is why we aim to deliver honest answers and dependable service.

Why choose 704 Diesel & Welding Services

704 Diesel & Welding Services was established in 2022 by Matt Harris to provide dependable diesel repair and welding services with a practical, customer-focused approach. We are a local business, and we take pride in doing honest work for people across Marshville, NC, the Charlotte area, and surrounding counties. When you call us, you are working with a team that understands diesel equipment, values clear communication, and respects your time.

We know customers want more than a quick guess. You want someone who will show up, inspect the machine carefully, explain the issue clearly, and help you move forward with confidence. That is exactly how we do business.

Schedule heavy equipment diagnostic service

If your equipment is showing signs of trouble, do not wait for a small issue to turn into a major breakdown. Contact 704 Diesel & Welding Services for heavy equipment diagnostic service in Marshville, Charlotte, and surrounding areas within 50 miles. We are ready to troubleshoot diesel engine problems, electrical faults, hydraulic issues, no-start conditions, and more. Call us today to schedule service and let us help you get your equipment back to work.