Services
Complete Fleet and Equipment Solutions
At Longley Diesel, we are the one-stop shop for all your mid-size and heavy-duty mechanical needs. We recognize that commercial machinery and transport are the backbone of the West Texas economy. Our commitment is to minimize your downtime and maximize your success by delivering Commercial Diesel Service West Texas can rely on.
We offer specialized expertise backed by over 33 years of experience and top-tier factory training. Below is an overview of the comprehensive services we provide:
Specialized Expertise in Diesel Engine Repair

Medium & Heavy Duty Diesel Truck Repair
We provide bumper-to-bumper service for owner-operators and fleets, covering major and minor repairs, performance upgrades, and preventative maintenance. Our service includes essential DOT Inspections to keep your commercial trucks compliant and on the road.

Diesel Engine Repair
As our core specialty, we service all diesel engine brands and applications, large and small. Whether it’s an in-frame overhaul or complex electronic diagnostics, our certified technicians ensure every Diesel Engine Repair meets stringent manufacturer standards.

Kubota Certified Repairs
We are an authorized Kubota Certified Repair shop. We offer complete diagnostics and repair on all Kubota diesel engines, regardless of application—from agricultural to industrial. Our on-site parts department supports rapid service.

Perkins Engines Certified Repairs
Trust our certified experts for comprehensive maintenance and Perkins Engines Certified Repairs. We service the full range of Perkins engines that power industrial systems, generators, and heavy equipment worldwide.

Bus & Motorhome Repair
We provide crucial engine and drivetrain service for all types of passenger transport, including school buses, charter buses, and diesel-powered RVs. We keep public and private fleets running safely and efficiently. (Note: We focus exclusively on mechanical and engine systems, not RV amenities.)

Heavy Equipment Repair
From excavators to bulldozers, if your machinery runs on diesel, we service it. We handle all complex repairs for construction, earth-moving, and rental equipment, ensuring your Heavy Equipment Repair is durable and reliable.

Tier 3 Refurbishment & Repower Program
Federal emissions regulations require industrial non-road diesel engines to meet increasingly stringent standards, such as Tier 3. If your valuable equipment relies on older, pre-Tier 3 engines, you face a major challenge: either retire perfectly functional machinery or find a solution to bring it into compliance.

Oil Field Equipment Repair
We service all diesel assets used in oil production, including pump trailers, compressors, frac equipment, and water transfer equipment. We understand the demanding environment and provide robust Oil Field Equipment Repair solutions.

Trailer Repair
We offer end-to-end service for semi-truck trailers and heavy equipment transports. As a certified DOT inspection facility, we diagnose and repair brakes, axles, lights, and structural components to ensure your fleet is safe and legal.

Engine Parts
When your industrial equipment is down, every minute costs you money. Having quick, reliable access to the correct engine parts is critical to minimizing downtime and maintaining the performance standards of your machinery.
Why Choose Longley Diesel?
Choosing Longley Diesel means choosing expertise backed by integrity. Our commitment to Commercial Diesel Service West Texas extends beyond the bay doors: we use OEM tools, offer a complete warranty that travels nationwide, and provide emergency roadside support within a 50-mile radius. We are dedicated to providing the trust and quality built over 33 years in the business.
Ready to schedule service or learn more about a specific repair? Contact us today!