Munson Earth Moving Corp.

Diesel Engine Service & Repair

Maximize Uptime with Expert Heavy Duty Diesel Engine Repair

Comprehensive Engine Service for Construction Equipment, Commercial Fleets, and Municipal Machinery.

When your yellow iron stops, your project stops. At Munson Earth Moving, we understand that every hour of downtime costs you money. Located in Williston, VT, and serving the region for over 70 years, we provide factory-level diesel diagnostics and repair for the heavy equipment that builds our infrastructure.

Whether it’s a Caterpillar excavator needing a field diagnosis or a Mack dump truck requiring a complete in-shop overhaul, our certified technicians have the experience to restore your power and get you back to work. We don’t just swap parts; we troubleshoot the root cause to prevent future failures.

Our Core Diesel Service Capabilities

We provide end-to-end diesel solutions for construction companies, municipalities, and freight haulers.

1. Advanced Mobile Diagnostics & Troubleshooting

Don’t haul a dead machine if you don’t have to. Our field service trucks are equipped with OEM-level diagnostic software to identify fault codes and mechanical failures on-site.

Computerized Diagnostics: Rapid identification of Check Engine lights and DPF/DEF warnings.
Fuel System Analysis: Testing injector timing, fuel pressure, and common rail systems.
Electrical Troubleshooting: Solving complex wiring issues that often mimic engine failure.

2. Complete Diesel Engine Overhauls & Rebuilds

When an engine reaches the end of its lifecycle, a rebuild is often more cost-effective than a replacement. We specialize in giving a second life to high-hour equipment.

In-Frame & Out-of-Frame Rebuilds: Comprehensive teardowns to factory specifications.
Cylinder Head & Block Machining: Resurfacing and pressure testing to ensure a perfect seal.
Turbocharger Repair & Replacement: Restoring boost pressure for maximum torque.
Component Re-certification: Dyno-testing rebuilt engines to ensure they meet load requirements.

3. Commercial Fleet Preventive Maintenance (PM)

The best repair is the one you never have to make. We offer custom PM agreements for Trash & Recycling fleets and Municipal road crews.

Fluid Analysis (S.O.S.): Early detection of internal wear through oil and coolant sampling.
Valve Adjustments: Maintaining optimal combustion efficiency.
Cooling System Service: Flush and pressure tests to prevent overheating during Vermont summers.
Aftertreatment Service: DPF cleaning and DEF system maintenance to maintain Tier 4 compliance.

Why Vermont Pros Choose Munson for Diesel Service

“We speak the language of heavy iron.”

70+ Years of Experience: We’ve been operating and fixing our own massive fleet since 1954. We treat your equipment with the same urgency as our own.
Diverse Engine Expertise: We service all major makes, including Cat, Cummins, Detroit Diesel, John Deere, Komatsu, and Volvo.
Central Williston Facility: Our heavy-bay shop is capable of housing the largest off-road dump trucks and excavators in the region.
Rapid Field Response: We know that a broken plow truck during a blizzard is a public safety issue. We respond accordingly.

Frequently Asked Questions (FAQ)

Do you offer mobile diesel repair for heavy equipment stuck on a job site? A: Yes. Our Mobile Field Service trucks are fully equipped to perform diagnostics and repairs on-site. If the repair requires a clean-room environment (like an internal engine rebuild), we can coordinate heavy haul transport to our Williston shop.

Can you service Tier 4 Final emission systems (DPF/DEF)? A: Absolutely. Modern construction equipment requires specialized knowledge of aftertreatment systems. We perform forced regens, DPF cleaning, and DEF pump repairs to resolve “de-rate” modes and get your machine back to full power.

Do you work on highway trucks or just off-road equipment? A: We service both. Our facility handles Class 8 heavy trucks, dump trucks, and flatbeds alongside off-road excavators and loaders. We are a one-stop shop for mixed fleets.

What is the typical turnaround time for a diesel diagnostic? A: We prioritize diagnostics to give you an answer quickly. For most local fleet clients, we aim to have an initial diagnosis within 24 hours so you can make informed decisions about repair vs. rental.