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Equipment · Commercial fleets · Industrial facilities

Equipment & fleet repair.Industrial maintenance.

Mobile welding, fabrication, and repair support for equipment operators, fleet teams, industrial facilities, and oilfield operations.

Keep the work moving.

Our equipped service truck brings welding capability, air tools, and crane support to your location. We review damage, material condition, access, and repair requirements before starting.

  • Heavy equipment buckets, booms, frames, and attachments
  • Crack preparation, weld repairs, mounts, and reinforcement
  • Commercial trailer kingpins, bolster plates, and crossmembers
  • Steel and aluminum fleet and trailer fabrication
  • Industrial maintenance welding and field modifications
  • Oilfield and energy equipment repair support
JJ Mobile Welding service truck beside a John Deere excavator during on-site equipment repair
JJ Mobile Welding service truck with crane beside a forklift at a field fabrication jobsite
Mobile welding rig and crane support on site.
Welder performing steel fabrication outdoors at the jobsite
Steel fabrication in progress.
Welder beside a Volvo excavator during field equipment work
On-site equipment work.

Equipment repair

Field welding for damaged equipment, components, and attachments.

Fleet & trailer repair

Repairs reviewed against manufacturer or engineering requirements.

Industrial maintenance

Planned maintenance, on-site modifications, and time-sensitive welding support. Call for availability.

Lowboys · Flatbeds · Freight trailers

Semi-trailer repair.
Kingpins & bolster plates.

We repair lowboys, flatbeds, freight trailers, and other semi-trailers, including rust-damaged bolster plates, damaged kingpin areas, crossmembers, and frames.

Experience from roughly 100 repairsJJ Mobile Welding LLC has completed around 100 semi-trailer kingpin and bolster plate repairs.

Replacement & upgrades

  • Kingpin and bolster plate replacement
  • Upgrades to thicker steel bolster plates
  • Heavier crossmembers above the bolster plate
  • Replacement of rust-damaged crossmembers
  • Steel and aluminum semi-trailer frame repair

From lifted or distorted bolster plates to damaged kingpin areas, we review the surrounding structure and repair scope. Repairs and upgrades follow the trailer’s manufacturer or engineering requirements.

Let’s talk about your project.

Send the jobsite location, scope, and schedule. We’ll confirm the next steps.

After-hours support: leave a voicemail or submit an estimate request and we’ll follow up promptly.