OCD Diesel OCD Diesel
715-536-1835

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Fleets & businesses

Obsessed with uptime.

Your trucks are your business. Fixing them and keeping them going mile after mile is our business. You think in days out of service and cost of repair, and we aim to keep both to a minimum.

Aerial view of the OCD Diesel shop and truck yard
Merrill, Wisconsin
  • Shop + road service

    In the bay or out on the road, one call to the shop gets you either.

  • Down units first

    Out-of-service trucks get priority. We'll give you a parts ETA before you're scheduled.

  • 72-foot bays, 14-foot doors

    Room to pull in long trucks, tall bodies, trailers, and big equipment and work on them indoors.

  • One stop for the whole unit

    Repair, electronics, parts, and heavy-duty tires from one shop and one phone number.

Keep them moving

Maintenance on your schedule.

PM on your intervals and DOT inspections keep small problems from turning into roadside ones. When we find something, we tell you straight what's urgent and what can wait.

Every repair goes on record for the unit. That history shows the trends that matter to your budget: which units cost the most to keep running, what's wearing early, and what's coming due. So you can plan repairs and replacements instead of reacting to breakdowns.

  • Preventive maintenance. Fluids, filters, grease, rust prevention, battery testing, and inspections.
  • DOT inspections.
  • Diagnostics & electrical. Engine, aftertreatment, ABS, transmission.
  • Trucks and trailers. Brakes, air systems, suspension, lighting, and reefer units.
  • Truck equipment. Liftgates, tarp systems, dump bodies, and cranes.
  • Hydraulics & couplings. PTOs, wet kits, fifth wheels, and kingpins.
  • APUs. Auxiliary power units for sleeper cabs.

Who we work with

Log trucks to fire trucks.

Logging outfits, mill haulers, towns, and counties run some of the hardest-working rigs on the road. We keep them ready.

  • Logging trucks & loaders

    Log trucks, the trailers behind them, and the loaders on top. Built for rough roads and heavy loads.

  • Paper mill haulers

    Chip vans and mill haulers that run hard, every shift.

  • Municipal & plow trucks

    Plow trucks and the equipment that keeps the roads open all winter.

  • Fire & rescue trucks

    Fire, brush, and rescue rigs that start and run reliably on every turn of the key.

  • Ambulances

    Keeping ambulances road-ready for every call.

  • Garbage & septic trucks

    Refuse and septic trucks, and the hydraulics and PTOs that run them.

  • School buses

    Keeping buses reliable and on their routes.

  • Cranes & dump bodies

    Cranes, dump bodies and hoists, and grapple saw installs.

Business accounts

Easy to do business with.

Set up an account and we'll work the way your fleet does: purchase orders, approval contacts, and payment terms that fit the way your business pays.

We accept EFS checks, Comdata, major credit and debit cards, and ACH / bank transfer.

  • PO numbers on every job.
  • Approvals from the people you choose.
  • Findings before work. No work without your OK.
  • Net 30 terms for approved accounts.

Running trucks for your business?

We're obsessed with keeping them moving. Let's set up an account.

Prefer paper? Fleet service request (PDF) · Extra unit list sheet · Wisconsin S-211