Plymouth Locomotive Works
A major American builder of small industrial and short-line locomotives.
Last updated August 31, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
Plymouth Locomotive Works was an American manufacturer of compact railroad locomotives used primarily by industrial facilities, mines, factories, warehouses, short-line railroads, and other private rail systems. Although the Plymouth name became closely associated with the locomotive plant in Plymouth, Ohio, the business originated with the J. D. Fate Company, which began producing locomotives in 1910. Fate-Root-Heath succeeded that company in 1919 and continued developing the small locomotive designs that eventually became identified with Plymouth. The company occupied a distinctive position in the railroad equipment market. Rather than concentrating on large main-line locomotives, it built relatively light, economical machines intended for switching and materials movement on industrial trackage. Most Plymouth locomotives weighed less than 25 tons, making them suitable for facilities that did not require the power or infrastructure of conventional road locomotives. The company produced machines in a wide range of gauges and became one of the world's most prolific builders of small industrial locomotives, with more than 7,500 units constructed according to the cited historical account. Plymouth's early engineering was notable for its unusual transmission arrangements. A patent application filed by J. D. Fate in 1917 described an engine connected to a clutch and continuously variable transmission. This system allowed the locomotive to vary speed through zero and into reverse, with power transmitted through a transverse jackshaft and chains to the driving axles. By 1925, Fate-Root-Heath documentation showed a more conventional four-speed transmission and reverse gearing, also driving the axles through a jackshaft and final chain drive. The first Plymouth locomotives used gasoline internal-combustion engines. In 1927, the company produced its first diesel locomotive, helping it address the growing demand for more durable and economical industrial motive power. Early gasoline models commonly used Chrysler engines; the locomotive maker's use of those engines was unrelated to Chrysler's Plymouth automobile brand. In 1937, the company also built two experimental short-line locomotives using alternative gaseous fuels, one powered by butane and the other by propane. The corporate and brand identity changed over time. In the late 1950s, the business adopted the name Plymouth Locomotive Works, reflecting its association with the Ohio manufacturing location. In the late 1970s, it changed its name again to Plymouth Industries. Despite these changes, the Plymouth name remained strongly associated with its locomotive products and with the large installed base of small locomotives operating across industrial rail systems. Manufacturing remained in Plymouth, Ohio, until the company was purchased by Ohio Locomotive Crane in 1997. Production subsequently moved to Bucyrus, Ohio, in 1999. Locomotive production later ceased. The rights to the spare-parts business were sold to Williams Distribution, leaving the historical Plymouth fleet as the principal legacy of the brand. Many examples remained in service decades after manufacture; the referenced account estimated that roughly 1,700 of the more than 7,500 locomotives built were still actively used. Plymouth is therefore best understood as a defunct industrial locomotive brand whose importance rests on the scale, longevity, and practical design of its small-railway products.
History
Plymouth's locomotive lineage began in 1910, when the J. D. Fate Company started building small railroad locomotives in Plymouth, Ohio. The company became Fate-Root-Heath in 1919. Its early products were gasoline-powered internal-combustion locomotives designed for industrial switching rather than long-distance railroad service. This market required compact equipment capable of moving cars around factories, mines, yards, warehouses, and other private rail facilities, often on track that could not support heavier locomotives. The early machines incorporated a distinctive mechanical drive system. A 1917 patent application associated with J. D. Fate described an engine driving a clutch and continuously variable transmission. The transmission could regulate locomotive speed through zero and into reverse. Power was then delivered to a transverse jackshaft by chain, followed by additional chain drives to the two driving axles. This arrangement provided a practical way to control a small locomotive without the complex systems used in larger railroad equipment. By 1925, Fate-Root-Heath documentation showed a more conventional design using a four-speed transmission and reverse gears. The jackshaft and final chain drive remained central to the power-delivery arrangement. The company continued refining compact mechanical locomotives, and in 1927 it produced its first diesel-powered example. Diesel power broadened the usefulness of the product line by offering an alternative to gasoline engines for customers seeking durability and operating efficiency. Plymouth's gasoline locomotives commonly used Chrysler engines during the early period. This mechanical relationship was separate from Chrysler's Plymouth automobile marque; the two names represented unrelated businesses. The company also experimented with fuels beyond gasoline and diesel. In 1937 it built two prototype short-line locomotives, one designed to operate on butane and the other on propane. These experiments illustrate the company's willingness to adapt its small-locomotive platform to alternative fuel sources, although the available reference does not establish that the prototypes became a large-scale production line. The business later changed its corporate name to match its best-known manufacturing identity. In the late 1950s it became Plymouth Locomotive Works, while in the late 1970s it changed its name again to Plymouth Industries. The Plymouth name nevertheless remained attached to the locomotives themselves. The manufacturer produced units in most rail gauges and relied heavily on mechanical torque-converter transmissions. Its focus on low-weight industrial locomotives made it a significant specialist rather than a competitor in the market for large main-line diesel locomotives. More than 7,500 Plymouth locomotives were reportedly constructed, making the company one of the most prolific builders of small industrial locomotives. Nearly all were below 25 tons. Their relatively simple construction and suitability for specialized rail operations helped many remain in service for decades. The referenced account estimated that approximately 1,700 units were still actively used, including examples more than half a century old. The company remained associated with its Ohio plant until 1997, when Ohio Locomotive Crane acquired it. In 1999, production moved from Plymouth to Bucyrus, Ohio. Locomotive manufacturing subsequently ended. The rights to the spare-parts business were sold to Williams Distribution. Plymouth's surviving locomotives, parts support, and preserved examples now constitute the principal continuing presence of the brand. Its historical significance lies in providing a large number of compact, durable locomotives for industrial railways that were not served by the mainstream locomotive manufacturers.
- 1999
Production moves to Bucyrus
[1]Locomotive manufacturing moves from Plymouth, Ohio, to Bucyrus, Ohio.
- 1997
Acquisition by Ohio Locomotive Crane
[1]Ohio Locomotive Crane purchases the company.
- 1970
Business becomes Plymouth Industries
[1]In the late 1970s, the company changes its name to Plymouth Industries.
- 1950
Business adopts the Plymouth Locomotive Works name
[1]In the late 1950s, the company changes its name to Plymouth Locomotive Works, aligning the corporate identity with its Ohio manufacturing plant and locomotive brand.
- 1937
Alternative-fuel prototypes
[1]Plymouth constructs prototype short-line locomotives powered by butane and propane.
- 1927
First Plymouth diesel locomotive
[1]The company produces its first diesel-powered locomotive, adding diesel propulsion to its established gasoline locomotive range.
- 1919
Fate-Root-Heath succeeds J. D. Fate
[1]The J. D. Fate Company becomes Fate-Root-Heath, continuing the development and production of small locomotives.
- 1917
Continuously variable locomotive drive documented
[1]A J. D. Fate patent application describes an engine, clutch, and continuously variable transmission capable of controlling speed through zero and into reverse.
- 1910
J. D. Fate begins locomotive production
[1]The J. D. Fate Company begins building small railroad locomotives in Plymouth, Ohio, establishing the manufacturing lineage later associated with Plymouth Locomotive Works.
Products and positioning
Compact, mechanically straightforward locomotives for industrial switching, private railways, mines, factories, and short-line operations.
Industrial switching locomotives · 1910
Plymouth industrial locomotives
Plymouth's principal product family consisted of compact locomotives for industrial railways, mines, factories, warehouses, yards, and private sidings. Most units weighed less than 25 tons, allowing them to operate on lightly built track and within confined facilities. The company built gasoline and diesel versions, produced locomotives in most rail gauges, and commonly used mechanical torque-converter transmissions. More than 7,500 locomotives were reportedly constructed, with a substantial number remaining in service for decades.
Gasoline-powered locomotives · 1910
Plymouth gasoline locomotives
The earliest Plymouth-line locomotives used gasoline-burning internal-combustion engines. Early examples employed drive systems derived from the Fate and Fate-Root-Heath designs, including chain-driven arrangements linking the transmission, jackshaft, and driving axles. Chrysler engines were used in some early locomotives; this connection was unrelated to the Chrysler Plymouth automobile brand.
Diesel switching locomotives · 1927
Plymouth diesel locomotives
Plymouth introduced its first diesel locomotive in 1927. Diesel propulsion expanded the company's offering for industrial customers seeking a robust alternative to gasoline power. These locomotives retained the brand's emphasis on compact dimensions, low weight, mechanical drivetrains, and switching work rather than high-speed main-line operation.
Industrial locomotive model
Plymouth CR-8
The CR-8 is a documented Plymouth locomotive model associated with the company's range of small industrial locomotives. The available reference identifies the model but does not provide sufficient technical specifications, production dates, or detailed operating history to describe it further without risking invention.
Brand decisions
1999
Relocation of locomotive productionStrategyBackground
After the acquisition by Ohio Locomotive Crane, the manufacturing operation was reorganized.
Action taken
Locomotive production was transferred from Plymouth, Ohio, to Bucyrus, Ohio.
Aftermath
The relocation was followed eventually by the end of locomotive production under the Plymouth lineage.
1997
Sale to Ohio Locomotive CraneM&ABackground
Plymouth had operated from its long-established manufacturing base in Plymouth, Ohio.
Action taken
Ohio Locomotive Crane acquired Plymouth Locomotive Works.
Aftermath
Production was moved to Bucyrus, Ohio, in 1999, and locomotive manufacturing later ceased.
1927
Introduction of diesel propulsionProduct launchBackground
Plymouth's earlier locomotives used gasoline-burning internal-combustion engines, while industrial customers also required durable equipment for recurring switching work.
Action taken
The company produced its first diesel locomotive, adding diesel power to its small-locomotive portfolio.
Aftermath
Diesel locomotives became part of Plymouth's long-term product history, although the available source does not quantify their share of total production.
Sources1 sources
Cite this profile: Cite the canonical profile. /brand-wiki/plymouth-locomotive-works · Editorial policy · How profiles are compiled