| 摘要 |
Tractors having extended drive axles are provided with improved traction by removing the large drive wheels normally on those axles and replacing each of them with a track laying accessory which includes a beam having a track sprocket at one end, a guide wheel at its opposite end, and a plurality of bogie wheels along its underside. An endless track is trained over the track sprocket as well as over the guide and bogie wheels. A hub is journaled on the frame and that hub receives and is secured to the extended drive axle of the tractor in the same manner as a conventional wheel hub. The hub and track sprocket are connected through a chain-and-sprocket drive which affords the tractor the same ground speed as the wheel the accessory replaces.
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