Deep in a Pennsylvania cow pasture, a moss-covered giant awaits rescue. This early Caterpillar D8 dozer, believed to be a 1H series model, has sat motionless for so long that nobody in the area remembers it running. Now destined for the National Pike Steam Show, this forgotten machine is about to get a second chance at life.
What makes this D8 special is its slide bar transmission system, featuring a distinctive horseshoe-shaped wishbone mechanism that slides back and forth to change gears. Starting this beast requires a smaller gasoline pony motor, which cranks the massive diesel engine while simultaneously sharing coolant to warm it up in cold weather.
This ingenious dual-purpose design is a hallmark of vintage Caterpillar engineering. Power output for these machines sits around 700 to 750 horsepower, making them formidable workhorses in their day.
Agricultural construction, land clearing, and heavy earthmoving were primary roles for machines like this D8. Its robust design allowed operators to push through terrain that would stop lesser equipment cold.
Remarkably, the pony motor fired up on varnished gasoline that had been sitting since 2012. Previous owners had the foresight to block up the machine and raise the blade, which saved the tracks from damage.
Recovery challenges included broken lift cables, seized steering clutches from water contamination, and rodent nests inside the transmission case.
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Watch the full technical process of firing up a 20-year-abandoned John Deere Model 40 Dozer!