Mobile Diesel & Heavy Equipment Repair in Peapack and Gladstone, NJ

If you’re broken down on Route 206 or stalled near Main Street, KS Diesel On-Site Repair gets to you fast. We deliver 100% mobile diesel mechanic service throughout Peapack and Gladstone, NJ, no towing, no waiting.

Contractors, fleet operators, farmers, and haulers across Somerset County trust us when their equipment goes down. We handle everything on-site, trucks, trailers, excavators, skid steers, hydraulic systems, line boring, welding, and more. If it runs on diesel, we fix it.

About Us

Why Choose KS Diesel in North Plainfield, NJ ?

We deliver expert-level mobile diesel repair, fully on-site, for Peapack and Gladstone’s contractors, fleets, and operators.

100% ON-SITE REPAIRS

All repairs are done at your location. No towing, no waiting, and no shop delays.

24/7 EMERGENCY RESPONSE

Breakdowns don’t wait. We’re available nights, weekends, and holidays.

1-YEAR WORKMANSHIP WARRANTY

Every job is backed by our solid 1-year workmanship guarantee.

FULLY EQUIPPED SERVICE TRUCKS

Our mobile units come ready to repair diesel trucks and heavy equipment on-site.

ASE-CERTIFIED TECHNICIANS

Repairs are performed by skilled, experienced, ASE-certified diesel mechanics, guaranteed.

Our Services

Our Mobile Diesel & Equipment Repair Services in Peapack and Gladstone, NJ

We offer full-service mobile repair for all diesel-powered equipment in Peapack and Gladstone, NJ and across Somerset County.

Heavy Equipment Repair

Whether you're working near the Natirar Park jobsite or a private development along Mosle Road, we provide on-site repair for excavators, skid steers, loaders, backhoes, and forklifts. We fix engine failures, hydraulics, wiring, fuel issues, and more — on the spot.

Mobile Truck Repair

Break down hauling material on Route 512 or Pottersville Road? Our mobile diesel mechanics come to your location fast. We repair semi trucks, box trucks, dump trucks, delivery trucks, and reefer units. From air leaks to engine no-starts, we’ll get you back on the road.

Roadside Assistance

Stuck with a dead truck on Holland Avenue or your backhoe won’t start on a jobsite? Call us. We handle engine shut-offs, fuel issues, jump starts, lockouts, electrical problems, and overheating or coolant leaks. If it’s down and diesel — we’ll fix it where it sits.

Line Boring

We offer portable line boring for construction equipment. Worn pin holes? Misaligned bores? We restore your machines without disassembly. Service available for excavators, loaders, backhoes, and more.

Welding & Fabrication

Mobile welding and fabrication for heavy equipment, frames, trailers, and brackets. We handle structural repairs, bucket rework, cracks, breaks, and custom weld fixes.

Hydraulic Hose Repair

Blown hose on a job? Call us for on-site hydraulic hose replacement. We crimp and install hoses where your equipment failed, including excavators, skid steers, loaders, dump beds, and hydraulic cylinders.

Diagnostics & Electrical Repair

Got a warning light, won’t-start issue, or weird code? We run full on-site diesel diagnostics. That includes computer diagnostics, electrical shorts, sensor problems, and control modules. No need to tow it to a shop, we’ll test and fix it right where you are.

PM Service (Preventative Maintenance)

We provide on-site preventive maintenance for diesel trucks and heavy equipment. From oil changes to inspections, we keep your machines running and DOT-compliant, right at your jobsite or fleet yard.

Fleet Maintenance

We service commercial fleets, construction companies, farms, and municipal vehicles on a set schedule. No shop delays, no transport, just consistent, reliable maintenance at your location.

Breakdowns happen anytime, and we respond anytime

24/7 Emergency Diesel Repair in Peapack and Gladstone, NJ

Breakdowns don’t wait, and neither do we.

If your equipment fails on Hilltop Road, Hardscrabble Road, or any jobsite in Peapack and Gladstone, we’re already on our way. Call us when you face:

Air brake failures
Hydraulic leaks
Electrical no-starts
Frozen reefer units
Broken fuel lines
Stuck valves
Overheating engines

KS Diesel responds fast, diagnoses quickly, and fixes on the spot. That’s how we keep your projects on track.

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!!!!!!