About Us

Equipment and Service To Global Markets

Engineered to maximize efficiency, safety and operator comfort, Rail King offers:

  • Exceptional performance and reliability
  • Smooth ride on rail
  • Easy-to-use controls
  • Extensive safety features including 360-degree visibility
  • Reduced operation and maintenance costs

Stewart & Stevenson, a Kirby Corporation Company, provides a broad array of support services.

Stewart & Stevenson — A Century of Innovation

For more than 100 years, Stewart & Stevenson has been a leading designer, manufacturer, and provider of specialized equipment and aftermarket parts and service to the oil and gas and other industries.

Our wide range of products covers hydraulic fracturing, well stimulation, workover, intervention and drilling operations. These products include pumping, acidizing, coiled tubing, cementing and nitrogen units, drilling and workover rigs, power generation systems and electrical support and distribution systems, as well as engines, transmissions and material handling equipment.

Headquartered in Houston, Texas since 1902, Stewart & Stevenson provides equipment and service to the global market from a strategic network of sales and service centers in domestic and international locations.

Company Overview

We provide reliable, flexible manufacturing, distribution and rental system services. Using advanced tools and expertise, we customize technology solutions to suit each customer’s unique requirements.


Stewart & Stevenson manufactures a line of Rail King mobile railcar movers that supports railcar switching operations throughout North America and in international locations. Engineered to maximize safety, efficiency and operator comfort, Rail King is manufactured in three side-mount cab models offering tractive effort ratings to 46,550 lbs, and two full-width cab models o