Payhauler Parts

Published: July 16, 2026  |  By FP Smith Parts & Equipment

Physical stock of Payhauler parts — new OEM surplus, quality used, and reconditioned components ready to keep legendary haul trucks working.

The Payhauler name still commands respect among operators who value tough, purpose-built haul trucks. Designed for demanding construction, mining, and quarry applications, these machines earned a reputation for durability and straightforward serviceability. Many continue to work productively today. At FP Smith Parts & Equipment, we support that legacy with a practical inventory of Payhauler parts — new OEM surplus, quality used, and reconditioned components — backed by 79 years of family-owned expertise.

Unlike suppliers who only list parts they must source on demand, we maintain physical stock at our 20-acre facility at 3190 Ramsey Rd., Fairfield, California. This real inventory approach means faster responses, better availability, and the ability to ship most orders the same day when placed before 3 PM PST.

Why Payhauler Parts Still Matter

Payhauler trucks were engineered for heavy-duty cycle work. Models such as the 350C, 350B, 340, and related series handled high payloads in tough conditions. Because many of these trucks remain in service — often in fleets that mix older and newer equipment — demand for quality replacement parts continues.

The challenge for owners and repair shops has always been consistent availability. Scarce legacy parts can lead to long downtime or inflated prices. FP Smith addresses that problem by stocking components that keep these trucks working without unnecessary delays.

Popular Payhauler Models We Support

Our inventory focuses on the models most commonly still in operation:

• Payhauler 350C
• Payhauler 350B
• Payhauler 340
• Related and earlier series trucks that share components

We also support associated systems and components that cross over with other equipment in our broader inventory, including certain Dresser and International Harvester-related parts.

Key Payhauler Parts Categories in Stock

Drivetrain & Powertrain

Axles, differentials, drive shafts, gears, and related hardware. These high-stress components are frequent service items on haul trucks operating in loaded cycles.

Brake Systems

Brake parts, related valves, and supporting components. Reliable braking is critical on loaded haul trucks, and we stock serviceable options to help maintain safety and performance.

Hydraulic Components

Pumps, valves, cylinders, and seal kits used in steering, dump, and related systems.

Engine & Cooling Support

Selected engine-related components, water pumps, radiators, and cooling system parts that support continued operation of these trucks.

Chassis, Suspension & Related Items

Structural and wear-related components that experience heavy use in quarry, mining, and construction environments.

Electrical & Accessory Items

Gauges, switches, and selected electrical components when available from our inventory.

Because we maintain both new surplus and quality used stock, customers often have multiple options depending on budget, urgency, and the remaining life expected from the truck.

The FP Smith Advantage for Payhauler Owners

• Physical inventory — Parts are stocked on-site rather than drop-shipped from unknown sources
• 79 years of continuous expertise — Deep knowledge of legacy and current heavy equipment applications
• Flexible options — New OEM surplus, quality inspected used, and reconditioned components
• Same-day shipping — Available on most orders placed before 3 PM PST
• Technical support — Help identifying the correct part for your specific model and serial number
• Worldwide shipping — We regularly support customers across the United States and internationally

This combination of real stock and practical experience is especially valuable for older haul trucks that are still economical to maintain.

Common Payhauler Repair Situations We Help With

Operators and shops frequently contact us for:

• Drivetrain and differential components after heavy loaded cycles
• Brake system parts to maintain safe operation
• Hydraulic repairs that restore steering or dump function
• Cooling system components during seasonal or high-hour service
• Hard-to-find items that other suppliers no longer carry

In many cases we can offer both used and new surplus alternatives so you can balance cost and expected service life.

How We Support Mixed Fleets

Many customers who run Payhauler trucks also operate dozers, loaders, or other equipment from brands such as Dresser, Dressta, Komatsu, or International Harvester. Because FP Smith stocks parts across these lines, we can often serve as a single practical source for multiple machines in the same fleet — simplifying purchasing and reducing downtime.

Whether you need a specific drivetrain component, brake part, hydraulic item, or help identifying the right replacement, our team is ready to assist. Same-day shipping on most orders placed before 3 PM PST. Expert help available Monday–Friday.