About Us

A&J Repair Services LLC is a mobile heavy equipment and diesel repair company serving the Inland Empire and surrounding Southern California areas. We provide professional on-site diagnostics, diesel engine repair, electrical and hydraulic troubleshooting, and preventive maintenance for construction and industrial equipment.

 

Our focus is reliable field service, clear communication, and honest diagnostics to help minimize downtime and keep equipment operating safely and efficiently. Whether it’s scheduled maintenance or troubleshooting a breakdown, we work directly on-site to get accurate answers and practical repair solutions.

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