![]() While the older D6B had been powered by the Cat D318 engine, the new D5 featured a naturally aspirated Caterpillar D333 diesel with a ninety three flywheel horsepower rating. The D6B had been a good reliable tractor for Caterpillar but had been replaced by the more powerful D6C. This “new” D5 had been developed from the very successful Cat D6B. Rebirth – The 1960sĬaterpillar revived the D5 name in 1967 with the introduction of two new D5 models, a direct drive and a power shift version, both of which were available in either 60” or 74” gauges. Only three of the forty six produced are known to still exist. ![]() This was due to low sales (an existing D6 of the day could do everything a D5 could and more) and the onset of WWII. ![]() Powered by a six-cylinder Caterpillar D4600 diesel, (the same engine that was used in the first Cat DW10 motor scrapers), the 1939 Cat D5 is a very, very rare tractor as only forty six were ever manufactured and production was curtailed the same year it commenced, 1939! The 1939 D5 was an offshoot of the D6-2H series on D4-7J undercarriage with a 60” gauge, and was known as the D5-9M series. I say once again, because the origins of the Caterpillar D5 go way back in time to 1939 when the D5 model was first introduced. In a bid to market an intermediate sized tractor to fill the void between the D4 and D6, Caterpillar once again revived the D5 name. Rather than a child of the late 1960s, its heritage goes much further back. Caterpillar’s D5 is a bit of an unsung hero, straddling the gap between small and medium sized track type tractors in the company’s product range.
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