Harrison Machine Works 20 HP Jumbo

By Bill Vossler
Published on October 9, 2008
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The 1914 Harrison Jumbo 20 HP steam traction engine at the Mt. Pleasant (Iowa) Midwest Old Threshers Reunion.
The 1914 Harrison Jumbo 20 HP steam traction engine at the Mt. Pleasant (Iowa) Midwest Old Threshers Reunion.
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The operator's platform on the Harrison Jumbo engine lacks the traditional seat.
The operator's platform on the Harrison Jumbo engine lacks the traditional seat.
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A close-up of the flywheel on the Harrison Jumbo 20 HP steam traction engine.
A close-up of the flywheel on the Harrison Jumbo 20 HP steam traction engine.
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A front view of Leroy McClure's Harrison Jumbo engine.
A front view of Leroy McClure's Harrison Jumbo engine.
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The cylinder side of the Harrison Jumbo shows the colorful restoration work that has been done on this 20 HP engine.
The cylinder side of the Harrison Jumbo shows the colorful restoration work that has been done on this 20 HP engine.
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The location where the Harrison Jumbo engine was manufactured is shown on the boiler of the engine.
The location where the Harrison Jumbo engine was manufactured is shown on the boiler of the engine.
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Leroy McClure stands with his Harrison Jumbo 20 HP steam traction engine.
Leroy McClure stands with his Harrison Jumbo 20 HP steam traction engine.
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Leroy's 30 HP Huber double-cylinder engine.
Leroy's 30 HP Huber double-cylinder engine.

Leroy McClure comes from a long line of people who love steam traction engines. “I’ve lived with them all my life,” the 58-year-old Colchester, Ill., farmer says. “My father bought a 20 HP Minneapolis and threshing machine new in 1923. Before purchasing the new machine he had used steam engines to operate sawmills and various threshing rings. He started collecting steam engines in the 1950s. He had a lot of different kinds, Huber, Rumely, Case, Gaar-Scott, Aultman & Taylor, Reeves, Advance-Rumely, Peerless, Wood Bros., Kitten, Russell, Baker and Keck-Gonnerman, having bought and sold several during his collecting years. He had 23 at one time.”

Today, Leroy has 16 of the engines left. (Some of them are now owned by Marshall and Michelle, his children.  “I am merely the caretaker for the next generation,” Leroy says.) One of his steam traction engines is this 1914 20 HP Harrison Jumbo.

Hobby from the Past

For Leroy, steam traction engines were a part of his life growing up. “My dad and two other guys got together and started a threshing show here on the farm, starting in 1953. That was basically where I started getting involved, because I was too young to have worked on threshing crews and the like,” he says.

The show was incorporated as the Illinois Threshers’ Jubilee, but was disbanded after three years, although the private show on the McClure farm continued.

Leroy’s earliest steam memories involve operating a Buffalo Springfield steam roller. “There was an older guy who was retired from the railroad, being the owner of the engine, and would come out here every Sunday as weather permitted to play with the toys. I was probably 7 or 8 years old, and he taught me how to run a steam engine. I was pretty excited,” he says.

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