The John Deere 6620 combine was introduced in 2001. Its 6-cylinder diesel engine featured 125 hp, or 93 kW, of power and a governed rpm of 2300. Its power take-off rpm was clocked at 540/1000. The 6620 also boasted a lift capacity of 16,360 pounds while only weighing 11,532 pounds. Before its discontinuation in 2006, it was considered one of the most reliable and functional combines on the market.
Combines are machines used to harvest grain. As a farmer guides it through a wheat field, crops are pushed down and cut by its blades. The cuttings are collected and placed on a conveyor belt inside the combine, where a threshing drum shakes the cuttings to free the grain and send it into a tank below. The conveyor belt moves the unused straw through the combine and onto the field. When the grain tank is full, it is unloaded into a truck or trailer through a side chute.
John Deere began in 1837 as a company specializing in small tools, shovels and pitchforks. The business revolutionized farming later that same year when its founder made a saw blade into a plow. The company has grown from a small, made to order business into a worldwide conglomerate that is considered the cornerstone of the agricultural business.