Mobile Diesel & Heavy Equipment Repair in Old Bridge, NJ

Broken down on Route 9, Route 18, or Old Matawan Road? KS Diesel On-Site Repair brings fast, 24/7 mobile diesel service right to you anywhere in Old Bridge.

We repair trucks, trailers, heavy equipment, and fleets on-site. No towing. No delays. Just expert diesel repair where you need it.

Old Bridge is a busy hub for construction, trucking, and equipment rental, with major routes like Route 9, Route 18, and CR-516. Whether you’re near Cheesequake State Park or working off Texas Road, we’ll get you back up and running fast.

About Us

Why Choose KS Diesel in Old Bridge, NJ ?

We deliver certified mobile diesel repair, fully on-site, for Old Bridge’s contractors, fleets, and operators. No shops, no towing, just fast, expert repairs where you need them.

100% ON-SITE REPAIRS

All repairs are done at your job site no waiting, no hauling, no shop delays.

24/7 EMERGENCY SERVICE

Breakdowns don’t wait. Nights, weekends, or holidays we come fast.

1-YEAR WORKMANSHIP WARRANTY

We back every job from welding to hydraulics with a full 1-year warranty.

TRUCKS, TRAILERS & EQUIPMENT

We service diesel trucks, reefers, heavy equipment, and full fleet vehicles.

ASE-CERTIFIED TECHNICIANS

Our techs are certified, experienced, and diesel-specialized. Guaranteed repairs.

Our Services

Our Mobile Diesel & Equipment Repair Services in Old Bridge, NJ

We offer a complete lineup of mobile diesel repair services for trucks, trailers, and heavy equipment in Old Bridge. Whether you’re working on a paving project, hauling freight, or operating on a construction site we bring the repair shop to you.

Heavy Equipment Repair

We repair excavators, skid steers, backhoes, loaders, and more. Common issues include hydraulic failures, engine problems, electrical faults, and broken pins or cylinders all fixed on-site without the need for transport.

Mobile Truck Repair

Our mobile diesel mechanics handle semi trucks, box trucks, reefers, and trailers. We fix air leaks, brakes, engine problems, AC, DEF, and electrical systems right on the roadside or lot.

Roadside Assistance

Breakdown on Route 34 or stuck near Old Bridge High School? We offer emergency diesel repair in Old Bridge, NJ anywhere, anytime. Whether it’s a cracked fuel line, no start, overheating, or air system issue, we’ll fix it on-site fast.

Line Boring

On-site line boring for heavy equipment pins, bushings, and bores. Perfect for worn-out excavators, backhoes, loaders, and more. Save time and restore precision without hauling equipment off-site.

Welding & Fabrication

We offer mobile steel welding, bucket repair, crack repair, and light fabrication on-site. Whether it’s on a trailer, backhoe, or custom job, we weld it where it sits.

Hydraulic Hose Repair

We replace damaged or leaking hydraulic hoses on excavators, skid steers, and more right at your job site in Old Bridge. Crimped on-site. Tested on the spot.

Diagnostics & Electrical Repair

Check engine light? Regen issues? We run full diesel diagnostics using advanced scan tools on trucks, tractors, and equipment. Quick fault code reads and real repairs not just resets.

PM Service (Preventative Maintenance)

We perform oil changes, filter service, brake checks, greasing, and DOT inspections at your location. Ideal for local contractors and fleet managers in Old Bridge.

Fleet Maintenance

We support fleet operators with regular maintenance, inspections, and emergency repairs. Whether you run a fleet of dump trucks, box trucks, or equipment trailers, we keep your vehicles compliant and running.

Breakdowns happen anytime, and we respond anytime

24/7 Emergency Diesel Repair in Old Bridge, NJ

When your semi-truck breaks down near Route 18, or your excavator dies mid-job in Sayrewoods South, KS Diesel is on call. Common emergencies we handle:

We Handle All Emergency Situations

We fix it all, no towing, no shop delays, no hassle.

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!!!!!!