News Release

Tuff Torq Expands Testing Capabilities with New Chassis Dynamometer Facility

March 6, 2024
Tuff Torq Corporation

Morristown, TN ( March 1, 2024) – Tuff Torq Corporation, a group company of Yanmar Holdings Co., Ltd has invested in increasing onsite testing capabilities with the addition of a zero-turn mower chassis dynamometer and purpose-built dynamometer facility. A large part of the future of Tuff Torq Corporation is dedicated to continued investment in technology for our customers. The Tuff Torq Test Department has been working closely with a dynamometer manufacturer in Michigan to design and build equipment that will be used specifically for testing commercial and residential zero-turn mowers. Testing can be performed on gas, diesel, and electric mowers with the ability to generate specific vehicle load conditions, while recording vehicle data.

Left: exterior view of new dual facility; right: South side interior of Chassis Dynamometer building.

Fuel and exhaust systems allow for 24-hour testing under temperature-controlled conditions.

・ AC Pulse Width Modulated Vector Control System provides full four-quadrant operation for “road load” simulations.
・ System has been sized for residential and commercial Zero Turn mowers.
・ Allows vehicle to remain stationary for observation under load for improved ability to instrument, collect data, and record video when replicating field conditions.

Pre-installed chassis dynamometer

About Tuff Torq

Tuff Torq Corporation, established in 1989, develops, manufactures, and sells hydro-static transaxle drive systems for industrial machinery such as ride-on lawn and garden tractors, off-road UTVs, construction equipment, as well as marine gears. They are a subsidiary corporation of Yanmar Holdings Co, Ltd. For more information, please visit

About Yanmar

With beginnings in Osaka, Japan, in 1912, Yanmar was the first ever to succeed in making a compact diesel engine of a practical size in 1933. A pioneer in diesel engine technology, Yanmar is a global innovator in a wide range of industrial equipment, from small and large engines, agricultural machinery and facilities, construction equipment, energy systems, marine, to machine tools, and components — Yanmar’s global business operations span seven domains. On land, at sea, and in the city, Yanmar provides advanced solutions to the challenges customers face, towards realizing A Sustainable Future. For more details, please visit the official website of Yanmar Holdings Co., Ltd.

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