For 1955 model IH tractors, the numbered "hundred-series" were offered. The "100" series models were given slightly different looks and few new features, but were essentially the famed "letter series" tractors. In 1957, IH again gave the tractor lineup an overhaul. Although the tractor design wasn't changed, new white paint was added to the grill and sides and new number designations were given. This improved sales at the time, but IH's inability to change and update was already showing.
At the Hinsdale, Illinois Testing Farm in July 1958, IH entertained over 12,000 dealers from over 25 countries. IH showed off their new "60" series of tractors: including the big, first of their kind, six-cylinder 460 and 560 tractors. But the joy of the new line of tractors was short lived. In June of that year, IH recalled the 460, 560, and 660 tractors: their final drive components had repeatably failed in production models. IH, who wanted to be the first big-power manufacturer, had failed to substantially update the final drives on the new six-cylinder tractors. These final drives, which were essentially made up of unchanged model "M" components, would fail rapidly under the stress of the more powerful 60-series tractors. IH's competitors took advantage of the recall, and IH would lose customers in the ensuing months.
Throughout the 1960s IH would introduce new tractors, and new methods of selling them. As producing tractors was the lifeblood of the company, IH would have to remain competitive in this field. They both succeeded and failed at this goal.
I'm sorry, back in the day, I wasn't so good with editing, AND it took ages to upload a video so, I always tried to make them as short as possible... On my Channel, there are Plenty of other oil change videos, you will see where the oil goes....