Crawler Loader Evolution


Wheel Loaders

Cat D-6 tracked tractor with a Trackson T-6 Traxcavator
Loader attachments for tractors date back to the 1920s, and most of these early attachments were operated by cable. The bucket was raised and lowered vertically, and dumped by releasing a trip. Though powerful diggers, these machines were frontheavy and topheavy, and visibility to the bucket was a challenge. This is a Cat D-6 with a Trackson T-6 Traxcavator.

Four examples of early crawler loaders illustrate how these machines evolved in the mid-20th century. All images are from the HCEA Archives.