Mobile Diesel & Heavy Equipment Repair in South Plainfield, NJ

Need fast, reliable diesel or heavy equipment repair in South Plainfield, NJ?
KS Diesel On-Site Repair brings 24/7 mobile service for trucks, trailers, and heavy machinery right to your site.

Whether you’re broken down on Route 287, working near Hadley Center, or hauling to Stelton Road, we show up fast with the tools to get you moving.

From roadside fixes to jobsite repairs we’ve got South Plainfield covered.

About Us

Why Choose KS Diesel in South Plainfield, NJ ?

We deliver expert-level mobile diesel repair, fully on-site, for South Plainfield’s contractors, fleets, and heavy equipment operators. No shops, no towing, no delays just fast, certified repairs right where you need them.

100% ON-SITE REPAIRS

All repairs are completed at your site no towing, no shop wait times, and no downtime.

24/7 EMERGENCY SERVICE

Breakdowns don’t wait. We’re ready nights, weekends, and holidays with fast, reliable service in South Plainfield.

1-YEAR WORKMANSHIP WARRANTY

Every repair is backed by our full 1-year warranty welding, hydraulics, diagnostics, and more.

TRUCKS, TRAILERS & EQUIPMENT

We service diesel trucks, reefers, trailers, heavy equipment, and fleet vehicles of all types.

ASE-CERTIFIED TECHNICIANS

Repairs are performed by skilled, experienced, ASE-certified diesel mechanics no guesswork, just guaranteed results.

Our Services

Our Mobile Diesel & Equipment Repair Services in South Plainfield, NJ

We provide complete mobile diesel repair and heavy equipment services across Middlesex County with a sharp focus on South Plainfield. All services are done on-site no towing, no delays.

Heavy Equipment Repair

We fix loaders, excavators, backhoes, skid steers, and forklifts right on-site in South Plainfield. Hydraulics down? Won’t start? We’ll come to your location and get it running same-day.

Mobile Truck Repair

Breakdown on Route 287 or Oak Tree Road? We’ll come to you. From engine issues to air leaks and electrical faults, we get your truck back on the road fast.

Roadside Assistance

If your semi, reefer, or dump truck breaks down in South Plainfield, we’ll respond fast 24/7. Fuel delivery, battery jumps, air brake fixes, and more.

Line Boring

We offer on-site line boring in South Plainfield for worn bores on heavy equipment. Restore precision, reduce downtime, and avoid costly replacements.

Welding & Fabrication

Need frame welding or bracket repair on-site? We bring MIG, TIG, and Stick welding to your South Plainfield jobsite for fast, reliable fabrication.

Hydraulic Hose Repair

From cracked loader lines to crane hose leaks, we build and replace hydraulic hoses on-site in South Plainfield day or night.

Diagnostics & Electrical Repair

We run full diagnostics for Cummins, CAT, Detroit, and more on trucks, reefers, and equipment across South Plainfield. Warning lights to no-starts, we fix it.

PM Service (Preventative Maintenance)

Keep your South Plainfield fleet moving with on-site PM. We handle oil changes, filters, DOT checks, and inspections for single units or full fleets.

Fleet Maintenance

Managing a fleet in South Plainfield? We offer scheduled service, inspections, and emergency support to keep your trucks and equipment running strong.

Breakdowns happen anytime, and we respond anytime

24/7 Emergency Diesel Repair in South Plainfield, NJ

When your equipment fails on Front Street, Route 287, or the Middlesex Greenway, we show up day or night.

We Handle All Emergency Situations

We diagnose fast and bring the right parts.

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!!!!!!