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LeTourneau, R. G. Inc. (1925-2011) | Historical Construction Equipment Association

Name: LeTourneau, R. G. Inc. (1925-2011)
Fuller Form: R. G. LeTourneau, Inc.

Historical Note:

Organizational History:

The rich history of R. G. LeTourneau as a contractor, inventor, manufacturer and philanthropist is extensively documented in several books.

Effective January 1, 2007, all LeTourneau, Inc. companies changed their names to LeTourneau Technologies, and LeTourneau’s Equipment Group became LeTourneau Technologies (LTI) Mining Products. The name change reflects the company’s focus on innovative technology. Over the last few years, LeTourneau, Inc. had purchased several companies to build specific components to support the Equipment Group, and this name change brings all of those companies under the same name.


On May 16, 2011, Joy Global Inc. (Collection 879) announced that it was acquiring 100% ownership interest in LeTourneau Technologies (Collection 460) from Rowan Companies, Inc. The oil drilling lines were spun off as LeTourneau Technologies Drilling Systems Inc. old off, and the mining equipment line was added to that of P & H Mining (Collection 414), which Joy also owns.

Product information

One of R. G. LeTourneau’s hallmarks was the use of a “Tourna” prefix in naming many of his inventions.  Also , he called his cable control units “power control units,” or PCU’s. The text of this guide and the databases uses “Cable control units” in most instances, for uniformity’s sake.

Serial number nomenclature:

During his Mechanical Drive era, ending with the sale of his construction lines to Westinghouse Air Brake, the first letter of a serial number prefix indicated the make of engine. C was Cummins, G was GMC or Detroit Diesel, and so forth.

Special information:

The collection includes the contents of a Letro-Loader wheel loader Sales Engineering Manual that was found in the files. At some point, all of the wheel loader brochures and spec sheets on file were added to the contents of the Manual, and there is no record of which ones actually are part of it. The brochures and specification sheets were removed and inventoried in an Excel spreadsheet for separate filing, and the remaining records are intact pending further processing.

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