MDJ & Son'sTRUCK & TRAILER REPAIR

Mobile Diesel Mechanic — Port Arthur, TX

When a truck is down on the shoulder, the repair has to come to it. We run a service truck out of our Port Arthur yard on FM 365 and work a 75-mile radius from there — the whole Golden Triangle, west on I-10 through Winnie to the Baytown corridor, and east across the Sabine into Lake Charles and Sulphur.

(409) 460-5040Monday – Friday 8:00am – 5:00pm · Saturday 8:00am – 12:00pm

What the service truck can actually do

The scanner travels with the truck, so a mobile call is not limited to tires and jump boxes. We pull fault codes and read live data on scene, troubleshoot electrical and sensor faults, replace starters, alternators, and batteries, service air brakes and air systems, change brake chambers and slack adjusters, handle lighting and wiring, prime and deliver fuel, and fix or replace tires. Air leaks, no-starts, dead batteries, blown lights, and flats are the calls we get most, and most of them end at the roadside rather than on a hook.

What has to come to the shop, and why

Some work needs a bay, a lift, and time. Clutch replacement, driveline work, fifth wheel and king pin repair, DPF cleaning, welding and fabrication, and DOT inspections are shop jobs — DOT inspections by law, the rest because doing them on a shoulder is how a repair turns into a comeback. We will tell you on the phone which side of that line your problem falls on before we roll, not after.

Honest about after hours

We are not a 24/7 operation and we will not advertise as one. Shop hours are Monday through Friday 8 to 5 and Saturday morning. After hours, calls get answered when we can answer them. If we can roll, you will know inside the first two minutes. If we cannot, you will hear that instead of being left to wonder while your clock runs. A driver who gets a straight no at 9pm can call the next shop. A driver who gets a maybe loses the night.

Who you get on the phone

Marcus handles the calls. He dispatches the carrier's nine trucks every day and drove semis himself for six years, so you are not explaining a derate or a dropped load to somebody who has never sat in one. Tell him what the truck is doing and where it is sitting and you will get a straight answer on whether we can roll and roughly when — including a no, if that is the answer.

What to have ready when you call

Tell us the make and model, the year if you know it, and where the truck is sitting — mile marker, exit number, or a cross street. Say what it is doing rather than what you think is wrong: cranks but will not catch, dropping air, dash light and a derate, flat on the passenger-side drive. That gets the right parts on the truck the first time instead of turning one trip into two.

Calls we run mobile

  • No-starts, hard starts, and dead batteries
  • Jumpstarts and battery replacement
  • Air leaks, air system faults, and brake chambers
  • Fault code pulls and live-data diagnostics on scene
  • Electrical and lighting faults
  • Starters and alternators
  • Tire repair and replacement, steer through trailer
  • Fuel delivery and priming after a run-out

Where we run this

Port Arthur, Nederland, Port Neches, Groves, Beaumont, Orange, Vidor, Winnie, Mont Belvieu, Baytown, Sulphur, Lake Charles — and the rest of the 75-mile service area.

Questions we get

How far will you travel for a mobile call?

Seventy-five miles and change from our yard at 1050 FM 365 in Port Arthur. That covers the Golden Triangle, the I-10 run west through Winnie to Baytown and Mont Belvieu, and east into Lake Charles and Sulphur. If you are sitting outside that ring, call anyway — we will tell you straight whether we can get to you.

Are you available 24/7?

No, and we will not claim otherwise. Regular hours are Monday through Friday 8:00am to 5:00pm and Saturday 8:00am to 12:00pm. After hours is by call and is not guaranteed. We would rather tell you no quickly than string you along overnight.

Can you do a DOT inspection at my yard?

No. DOT inspections are shop-only for us. Bring the truck to the Port Arthur shop and one of our two certified DOT inspectors will run it.

Do you work on RVs or travel trailers?

No. We are a commercial truck and semi-trailer shop. RVs, travel trailers, boat trailers, and buses are outside what we do, and we would rather point you to someone set up for them than take the job and do it badly.

Call the shop — (409) 460-5040