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Engine, Tier 4 Emissions & DPF Repair

Engine repair and Tier 4 emissions troubleshooting from a KAC Tier 4 Engine Specialist.

Tier 4 emissions repair in Tucson & Pima County


Tier 4 emissions issues can park a modern machine. Our lead technician is a KAC Tier 4 Engine Specialist with Tier 4 and Tier 4 Interim engine technical certifications and an Emissions Expert Certification.

  • Engine and Transmission Repair
  • Tier 4 and Tier 4 Interim engine diagnostics
  • Emissions system and DPF troubleshooting
  • Caterpillar and Komatsu diagnostics
  • Emissions Expert Certification

Whether it’s a Tier 4 emissions issue, a hydraulic failure, or a custom fix for heavy machinery, our team brings professionalism, accuracy, and certified expertise to every job.

Heavy equipment diesel engine on a stand during repair

Equipment We Work On


  • Dozers, Loaders, Excavators & Graders
  • Mining Haul Trucks & Mine Equipment
  • Skid Steers & Compact Track Loaders
  • Telehandlers (incl. Xtreme)
  • Man Lifts, Scissor Lifts & Man Baskets (incl. SkyJack)
  • Backhoes & Tractors
  • Service Trucks & Fleet Vehicles

CAT • Komatsu • John Deere • Case • Volvo • Hitachi • Takeuchi • Bobcat • Kubota • SkyJack • Xtreme • JLG • Genie • and more

Where We Work


Serving Tucson, Marana, Oro Valley, Vail, Sahuarita, Green Valley, and all of Pima County.

  • Tucson
  • Marana
  • Oro Valley
  • Vail
  • Sahuarita
  • Green Valley
  • All of Pima County

Other Services


Need a machine fixed?

Call, text or email for a free estimate. We come to your job site.

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