MDJ & Son'sTRUCK & TRAILER REPAIR

Semi-Trailer Repair

This page is about commercial semi-trailers: flatbeds, step decks, end dumps, vans, and the trailers behind working tractors. We do not service RVs, travel trailers, boat trailers, or utility trailers, and pointing that out up front saves everybody a phone call.

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

What we repair

Air brake systems, chambers, S-cams, and slack adjusters. ABS faults. Lighting and wiring, which on a trailer is most of what actually strands one. Suspension and air bags. Fifth wheel, landing gear, and king pin. Wheel seals and hub work. Welding and fabrication for cracked frames, broken crossmembers, damaged rails, and torn-off brackets. Liftgate repair. Tires in every position.

Lights and air are the two that get you

The overwhelming majority of trailer problems are electrical or pneumatic, and they are the two things a roadside inspection looks at first. A corroded ground, a chafed harness where the loom crosses a crossmember, a cracked glad hand seal, a leaking chamber. None of it is expensive to fix and all of it will put a unit out of service. Trailer lighting and air leaks are the most common things we correct on inspections.

We run our own trailers

The sister carrier runs twelve trailers out of this same yard — flatbeds, step decks, and end dumps working the I-10 corridor. Those trailers are maintained here. Landing gear that will not crank in a muddy laydown yard, a king pin that has taken abuse, air bags that gave out on a plant road: we have fixed all of it on our own equipment before we ever quoted it to yours.

Drop it and leave it

A trailer can be dropped without holding an appointment slot and worked when the bay comes open. The yard is gated with cameras on site, so it is not sitting on a public shoulder while it waits. For fleets, that is the difference between a trailer waiting on us and a driver waiting on us.

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

Do you repair RVs, travel trailers, or boat trailers?

No. We work on commercial semi-trailers only. RVs, travel trailers, boat trailers, and buses are outside our scope — a shop set up for them will do you better than we would.

Can you weld a cracked trailer frame?

Yes. Welding and fabrication are in-house — cracked frames, crossmembers, rails, and brackets.

Do you do trailer DOT inspections?

Yes, in the shop. Semi-trailers get the annual periodic inspection including landing gear, king pin, air lines, brakes, and lighting. We do not do mobile inspections.

Can I drop a trailer without an appointment?

Call first so we know it is coming and who to reach, then yes — there is room in the yard to leave it.

Call the shop — (409) 460-5040