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I Have Heard Something About A Device Called A Speed Changer, What Is That?

April 26, 2017called changer device heard speed

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I Have Heard Something About A Device Called A Speed Changer, What Is That?

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By the mid 50s a number of competing walking tractors offered actual multi-speed transmissions. The Bradley walkbehind, true to its low cost nature, did not offer a transmission, but instead opted for a variable pitch pulley arrangement that mounted on an arm midway between the engine and the clutch pulley. Separate belts ran from the variable pulley forward to the engine, and from the variable pulley back to the clutch. A handlebar mounted lever placed slight pressure on the arm holding the variable pulley. Pushing forward forced one belt up in the pulley while the other went down. Backward pressure caused the opposite effect. The result of moving the belts in or out was a change in ratio. The speed changer can vary the ground speed between 1 3/4 MPH and 4 MPH (1 3/4 MPH is still too fast). Speed changers were offered as options and as standard equipment of some tractors.