Supporting the Backbone of American Agriculture

Published: July 9, 2026  |  By FP Smith Parts & Equipment

Millions of parts in our Fairfield facility help keep decades-old IH, Allis-Chalmers, and Caterpillar machines productive on farms and ranches across America.

In the heart of California’s farmland and across ranches nationwide, many operators continue to rely on proven, hardworking legacy equipment from International Harvester (IH), Allis-Chalmers, and Caterpillar. These machines—often decades old—represent significant investments and embody generations of agricultural innovation. However, maintaining them in today’s demanding operations presents unique challenges: parts scarcity, rising new-equipment costs, and the need for reliable daily performance during critical planting, harvesting, and livestock seasons.

At FP Smith Parts & Equipment, we’ve specialized in bridging this gap since 1947. As a family-owned business with millions of parts in physical inventory, we help farms and ranches keep their older IH, Allis-Chalmers, Caterpillar, and similar legacy machines productive without forcing premature replacements. Here’s how we support your daily operations.

The Real-World Challenges of Legacy Equipment on Farms and Ranches

Older tractors, combines, loaders, dozers, and implements from the IH, Allis-Chalmers, and CAT lines are built tough and often remain the most practical tools for specific tasks. A well-maintained IH 806 or 1466 tractor, an Allis-Chalmers WD or D-series, or a Caterpillar D7 or 950 loader can still deliver exceptional service. Yet challenges arise:

• Parts Availability: OEM production has long ceased for many models. Dealers may no longer stock components, leading to long lead times or backorders.
• Downtime Costs: During harvest or haying season, every hour a machine sits idle can mean lost revenue or delayed operations.
• Cost Efficiency: New replacement equipment carries a hefty price tag, while quality used or reconditioned parts often provide 80-90% of the performance at a fraction of the cost.
• Knowledge Gap: As experienced mechanics retire, finding expertise for these classic systems becomes harder.

We address these head-on with deep inventory, specialized knowledge, and responsive service tailored to agricultural users.

Our Comprehensive Support for IH, Allis-Chalmers, and Caterpillar Legacy Equipment

Extensive Physical Inventory

Unlike brokers or online-only sellers, FP Smith maintains one of the largest independent stocks of heavy equipment parts on the West Coast at our 20-acre facility in Fairfield, California (3190 Ramsey Rd.). We carry new OEM surplus, quality used, and reconditioned components for:

• International Harvester (IH): Engines, transmissions, hydraulics, undercarriage, gauges, bearings, and more for models like the 706, 806, 966, 1466, and later Dresser/IH lines. We frequently source from factory closures and dealer surplus, preserving parts that keep vintage red tractors and combines in the field.
• Allis-Chalmers: Iconic orange equipment parts including those for the WC, WD, D10-D19 series tractors, and industrial models. Our inventory supports everything from steering clutches and final drives to electrical systems still vital on many ranches.
• Caterpillar (CAT): Track components, engine parts, hydraulics, and attachments for legacy dozers (D6, D7, D8), loaders, and scrapers. We help operators maintain these workhorses for land clearing, irrigation ditch work, and heavy lifting around the farm.

Because we stock most items physically rather than drop-shipping, we can often ship the same day (orders before 3 PM Pacific typically go out that day) via expedited options when needed.

Expertise You Can Rely On

Our team brings decades of hands-on experience with these brands. We don’t just sell parts—we help identify the right part the first time using our extensive parts manuals library and cross-reference knowledge. Whether you need a specific IH brake bleeder screw, an Allis-Chalmers carburetor kit, a CAT D311 rod bearing, or a hard-to-find Komatsu/Cummins crossover compatible with legacy setups, we provide guidance that minimizes guesswork and installation issues.

Reconditioning and Rebuild Support

Many legacy machines benefit from reconditioned assemblies. We offer quality reconditioned engines, transmissions, and components that are tested and ready to install. Looking ahead, our planned FP Smith Rebuild Center will expand these services with professional engine and transmission rebuilding capabilities—further extending the life of your equipment.

Beyond Parts: Full Operational Support

• Hard-to-Find and Vintage Sourcing: We excel at locating obsolete items through our network, military surplus channels, and international sources.
• Restoration and Maintenance Projects: Many family farms restore heritage tractors for both work and show. We supply authentic or high-quality equivalent parts that maintain original performance and value.
• Competitive Pricing and Worldwide Reach: Local Northern California farms and ranches enjoy fast local pickup or delivery options, while our shipping network supports operations across the U.S. and internationally.
• Reliable Policies: 30-day returns on most new and used parts (with clear terms for reconditioned/special-order items), transparent independent-supplier disclaimers, and a commitment to fair dealings rooted in our family legacy.

Or a vineyard operator maintaining CAT equipment for terrain work: We supply undercarriage parts and filters that keep machines reliable on uneven ground, reducing repair frequency and fuel costs over time.

These examples highlight broader benefits:

• Economic: Extending equipment life defers large capital expenditures.
• Sustainability: Keeping machines operational reduces manufacturing demand and waste.
• Heritage Preservation: Supporting legacy equipment honors the history of American agriculture and brands like IH and Allis-Chalmers that built it.

Why Choose FP Smith Parts & Equipment?

We are more than a parts supplier—we are partners in keeping your operation productive. Our commitment stems from our own family history: Founded by Francis Peter “Piggy” Smith in 1947, we’ve grown by stocking real inventory, delivering expertise, and serving the communities that rely on this equipment daily. Whether you operate a small family ranch or a larger commercial farm, we understand the rhythms of agricultural life.

Browse our inventory online, call our team, or visit us in Fairfield, CA. Let us know your model and needs—we’re here to help source the right part quickly and affordably.