Mini & Compact Excavator DOC Rebuild

New England Supply House rebuilds the diesel oxidation catalyst (DOC) on mini and compact excavators — core exchange, built to meet EPA emissions standards, usually a 1–2 business day turnaround, for a fraction of OEM cost.

Brands & machines we rebuild

Does your mini have a rebuildable DOC?

Compact excavators top out around 75 hp, so SCR/DEF is a non-issue for the whole category — every aftertreatment-equipped mini is DOC-only or DOC+DPF, and both contain a rebuildable DOC. The one thing to screen for: the popular 3-ton class is deliberately spec’d at about 24.8 hp to stay under the 25 hp threshold and runs with no aftertreatment at all — no DOC to rebuild. Check horsepower first, then ship us the core.

Pricing: Off-road converter rebuilds are quoted per engine and converter — call 774-701-6374 for your price.

How the rebuild works

Core exchange is required — we rebuild your catalytic converter, so we need your core to complete the job.

  1. Get a quote and place your order. Tell us your machine’s model, engine, and serial. We’ll reply with a price and set up your order.
  2. Get your converter to us. Choose drop-off or shipping — drop-off is by appointment at our Foxboro shop, or ship it to us from anywhere in the country with tracking and insurance. We’ll send instructions with your order. We rebuild your unit with new internals, built to meet EPA emissions standards.
  3. Back to work in 1–2 days (typically). Standard turnaround is 1–2 business days from receiving your core. Need it sooner? Ask about expedited service.

Get your quote

Tell us your machine’s make, model, and engine and we’ll confirm we can rebuild the converter and give you a price.

Get your quote → or call 774-701-6374

Unsure whether your machine has a rebuildable catalyst? See DOC vs DPF vs SCR — which do you have? or our catalytic converter rebuild program.