Dynahoe Loader Backhoe

摘要

Today's loader-backhoes originated in the early 1950s when farmers and small contractors wanted a low-cost, multi-purpose excavating and loading machine. Light-duty loader buckets had been mounted on agricultural tractors since the 1920s, but following hydraulic technology advancement in the 1940s, manufacturers began supplying tractors with a loader in front and also a backhoe at the rear. The idea was a phenomenal success and it wasn't long before manufacturers began to offer integrated units built from the ground up as digging machines, and not farm tractors carrying digging attachments.rnAs a newcomer to the market in 1959, the Hy-Dynamic Co. of Lake Bluff, Ill., introduced the first model of its legendary Dynahoe line of loader-backhoes. The Dynahoe Model A was equipped with a Continental F-244 gasoline engine developing 65 horsepower, and the Model AD was offered with a 65-horsepower Continental HD-277 diesel engine. Maximum digging depth was 13 feet and backhoe loading height was 12 feet. Operating weight for either model was 13,000 pounds. Even this early design sported a neat, efficient backhoe linkage, integrated design and massive frame.