Motor Scrapers - Construction Equipment

The elevating motor scrapers include an electrically-driven elevator which is made of two chains that are equipped with a series of crossbars, instead of an apron. The purpose of the elevator is to assist in loading the material into the elevating bowl of the motor scraper. In order to dump material, one must slide the floor of the bowl backwards. To do this, the elevator should be reversed. This allows the load to be evenly dumped.

Caterpillar revealed their very first motor scraper in 1941. This motor scraper was referred to as the DW-10. Caterpillar used a four-wheel tractor for this scraper and featured a 100 horsepower engine. The tractor pulled the scraper with a capacity of 10-cubic yard. Ten years later, Caterpillar introduced to the market, the DW-21. This new model featured the first two-wheeled tractor in the company which was attached to a scraper that was cable-operated. It was capable of moving 18 cubic yards at a time. It was a true forerunner of present line of motor scrapers by Caterpillar, as it had the capability of steering in ninety-degrees. During the 1950s, there were models introduced which were smaller until the 600 series was introduced in 1960.
In 1964, Caterpillar introduced and began to manufacture elevating motor scrapers. The first model was known as the J619. From 1979 to 1984, the company sold its most powerful and largest motor scraper, the 639D. This model could move 34 cubic yards and was a twin-powered model. In 1984, Caterpillar began offering a line of auger motor scrapers. These motor scrapers were self-loading and were touted as an alternative to the elevating motor scraper models. The auger models were able to be single powered or twin-powered.