Classic Machines ScrapersClassic Machines: The Caterpillar 630A scraperContrafed PUblishingMarch 30, 2016June 12, 2020 by Contrafed PUblishingMarch 30, 2016June 12, 2020 Although the Cat 630A was a significant improvement on its predecessor, it didn’t have hydraulic controls and was soon surpassed by the 630B. By Richard...