Mobile Diesel & Heavy Equipment Repair in Flemington, NJ

Need a mobile diesel mechanic in Flemington, NJ? We fix trucks, trailers, and heavy equipment on-site — fast, 24/7, and with no towing required. Whether you’re stuck on Route 31, near Liberty Village, or at a job site off Sergeantsville Road, KS Diesel comes to you with same-day, guaranteed repairs.

About Us

WHY CHOOSE KS DIESEL IN Flemington, NJ?

We deliver expert mobile diesel repair, fully on-site, for Flemington's contractors, fleets, and municipal operators. No towing, no delays, just fast, certified repairs where you need them.

100% ON-SITE REPAIRS

We come to your job site, roadside, or yard. No towing needed.

LOCAL TO SOMERSET COUNTY

Available any time, including nights, weekends, and holidays.

SAME-DAY REPAIR

Most repairs completed on the first visit to reduce your downtime.

1-YEAR WORKMANSHIP WARRANTY

Every repair is guaranteed for one full year.

ASE-CERTIFIED TECHNICIANS

Experienced, qualified diesel mechanics ready to respond.

Our Services

Our Mobile Diesel & Equipment Repair Services in Flemington, NJ

We fix diesel problems where they happen, in your yard, at the job site, or on the side of the road. Here’s what we offer in Flemington:

Heavy Equipment Repair

We perform on-site repairs for excavators, skid steers, loaders, backhoes, and forklifts in the Flemington area. If your excavator blew a hydraulic hose or your skid steer won’t start near Reaville, we’ll fix it fast. We handle engine problems, electrical system failures, hydraulic leaks, cooling issues, and starting system repairs including starters, alternators, and batteries.

Mobile Truck Repair

If your truck breaks down on Route 31 or your semi won’t start in Flemington Industrial Park, we come to you. We perform full-service mobile truck repairs including engine diagnostics, fuel system issues, electrical faults, and brake or air system problems. No towing needed.

Roadside Assistance

Stuck with a reefer or diesel truck on Route 202, Mine Street, or in a Flemington neighborhood? We offer mobile roadside diesel repair wherever you are. Common roadside calls include air leaks, dead batteries, cooling problems, and trailer lighting or brake issues.

Line Boring

We bring precision on-site line boring services to job sites in and around Flemington. Ideal for worn pivot points, damaged bores, or loose bucket linkage areas, all done without the need to disassemble your equipment or haul it to a shop.

Welding & Fabrication

We provide on-location welding and fabrication services for heavy equipment, trailers, and fleet vehicles across Flemington. Whether it's a cracked frame, broken bucket, or custom bracket, we get your equipment back in working order fast.

Hydraulic Hose Repair

A blown hydraulic hose can bring work to a halt. We cut, crimp, and install new hydraulic hoses on the spot. Serving contractors and fleet managers near Walter E. Foran Blvd and surrounding commercial areas, we get your hydraulics sealed and flowing again.

Diagnostics & Electrical Repair

We use advanced diesel diagnostic tools to pinpoint engine and electrical issues quickly. From check engine lights to intermittent faults, we scan, test, and confirm the real source of the problem so your downtime is minimized.

PM Service (Preventative Maintenance)

On-site preventive maintenance for trucks and equipment. We help you avoid costly breakdowns and stay DOT-compliant, fast, reliable, and done at your location.

Fleet Maintenance

Keep your fleet running with mobile maintenance you can count on. Serving Flemington contractors, trucking companies, and municipal fleets with scheduled service and quick turnaround.

Breakdowns happen anytime, and we respond anytime

24/7 Emergency Diesel Repair in Flemington, NJ

Breakdowns don’t wait. Neither do we. Whether your semi-truck loses power near the Flemington Circle or a backhoe fails on Voorhees Corner Rd, we’ll dispatch immediately.

Common Flemington emergencies:

We know the local roads, business parks, and job sites, and we’ll get you back to work.

What Our Customers Say

TESTIMONIAL

      EXCELLENT  
   Based on 30 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Howard Mcnabb 
 
 
 
 Trustindex verifies that the original source of the review is Google. I was stuck on 202  from last night and Kevin came and got me up and running this morning. And his prices  are reasonable .I would definitely go with him again
  
 
      Posted on Google  
   
   Nicholas Dessauer 
 
 
 
 Trustindex verifies that the original source of the review is Google. Kevin is a absolute amazing Mechanic!!!! We were coming back to Long Island fromKY and the Fan pulley went out on our 3500 diesel truck and he was able to get the parts and fix the truck and have us back on the road in very quick way. Excellent service and communication. Price was very reasonable and for a same day call and fix he did an Outstanding Job!!! Thank you again Kevin we appreciate you so much!!!!
  
 
      Posted on Google  
   
   Karam Bains 
 
 
 
 Trustindex verifies that the original source of the review is Google. I am from canada and got problem on my Columbia with Cat c15, twin turbo And looked for mobile service and got in touch with KS diesel in NJ he is the best guy I have ever met for mobile service , very much knowledgable and cool headed , not greedy Would recommend this guy to everyone, if you got any problem in Somerset NJ area call this guy 10/10 for price 10/10 problem solver
  
 
      Posted on Google  
   
   Eric Karstensen 
 
 
 
 Trustindex verifies that the original source of the review is Google. Kevin is the best. Fast excellent work. Great on the road mechanic. Best prices around! Nice guy. Would recommend for all truck repairs. A++
  
 
      Posted on Google  
   
   Danny Guerrieri 
 
 
 
 Trustindex verifies that the original source of the review is Google. Awsome
  
 
      Posted on Google  
   
   ibrahim elhabbal 
 
 
 
 Trustindex verifies that the original source of the review is Google. Trust worthy, honest, genuine and very hard working. What else do you need from your mechanic. Always answers right away and gives you best recommendations!!!!!!