Cat chose to not meet the emission requirements. All the had to do to meet them was add urea to the exhaust and they were adamant at the time that they would not do so. IH was also adamant that they would not use urea... and is so doing added EGR to the 466 and took one of the most reliable engines on the road and turned it into a heap of crap. That's also what Cat basically did to their big engines... so it's not hard to see why they wanted out.
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Today's Featured Article - Tractor Profile: Allis-Chalmers WD45 (Gas Version) - by Staff. Beginning production in 1953, the WD45 had the same general look as the WD tractor which was produced earlier - but was much more powerful. This was due to the new 4-cylinder "Power Crater" gasoline engine with a 4 x 4-1/2 inch bore and stroke. Some people feel this was one of the most significant tractors offered by Allis-Chalmers in those days. Nothing in its weight or power class could match its performance. In 1954 they began offering the WD45 with the new "Snap-Coupler&quo
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