International Trucksrepair & diagnostics
International (Navistar) trucks — from ProStar and LT Series to WorkStar vocational chassis — run MaxxForce and the newer A26, plus Cummins options. We handle International EGR cooler faults, SCR/DEF derates, and regen issues that strand these trucks.
Shop & mobile service for International Trucks
Connect the right laptop, pull active and inactive codes, and read live data before recommending parts.
Forced (parked) regens, SCR/DEF dosing faults, NOx sensor diagnosis, and derate clearing.
Slack adjusters, chambers, relay valves, drums, linings, and ABS blink-code reading.
Alternators, batteries, parasitic draws, 7-way, and crank/no-start diagnosis.
Air ride ride height, air bags, leveling valves, and walking-beam service.
Preventative maintenance A/B/C and annual DOT inspections that leave you compliant.
Commercial tire sales, mounting, balancing, wheel seals, bearings, and hubs.
Lights, brakes, suspension, landing gear, doors, and reefer refrigeration troubleshooting.
The faults we see most
Coolant loss and derates tied to the EGR system — a recurring Navistar fault we diagnose before recommending replacement.
Usually a doser or sensor, not the fluid — we verify with a refractometer and live data before draining.
Sensor or DOC failures blocking the parked regen cycle.
International Trucks engine platforms
We connect the right diagnostic laptop for each engine platform International Trucks runs, pull the fault codes, and read live data before recommending a single part. Below are the engines we service on International Trucks.
Read the diagnostic path
MTG Shops does not perform engine overhauls or major component rebuilds in-house. We have quality partners in every market who specialize in International Trucks overhauls and in-frame / out-of-frame rebuilds. We handle the diagnosis, get the truck to the right specialist, and coordinate the handoff. You get an honest answer about what we fix and what goes to a trusted partner.
Get a bay time and a straight estimate.