Agriculture Engine Machining & Rebuilding
For over 50 years, Duffin Diesel has provided precision engine machining and rebuilding services for the agricultural industry throughout South Texas.
We understand that downtime during planting, irrigation, harvesting, and feeding operations can be costly. Our goal is to provide high-quality machining services with dependable turnaround times to help keep your equipment operating when it matters most.
Common Agricultural Engines We Service
John Deere
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4045
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6068
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6466
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PowerTech Series
Cummins
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QSB Series
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QSL Series
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5.9L
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6.7L
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ISC
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ISL
Other Agricultural Applications
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Irrigation Power Units
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Tractor Engines
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Combine Engines
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Sprayer Engines
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Feed Mill Equipment
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Generator Sets
Our Services
Cylinder Head Rebuilding
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Pressure Testing
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Resurfacing
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Valve and Seat Repair
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Guide Replacement
Engine Block Machining
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Boring and Honing
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Deck Resurfacing
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Counterbore Repair
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Main Bore Alignment
Crankshaft Services
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Grinding
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Polishing
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Inspection
Connecting Rod Reconditioning
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Resizing
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Bushing Replacement
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Inspection
Complete Engine Rebuilding
Our experienced machinists rebuild agricultural engines to OEM specifications using proven machining practices and precision equipment.
Why Choose Duffin Diesel
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Family Owned Since 1970
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Located in San Antonio, Texas
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Over 200 Years Combined Machining Experience
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AERA Member
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Fast Turnaround Times
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Precision Equipment Including Rottler EM79 and Serdi 4.5
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Serving Farmers, Ranchers, Equipment Dealers, and Agricultural Contractors Throughout South Texas
Contact Duffin Diesel
Need a quote on an agricultural engine?
Call us today to discuss your project and learn how Duffin Diesel can help get your equipment back in service.