Our original 1960 John Deere 830 yanking on the sled with the throttle set to idle. Listen to the pistons hammering away. It came equipped from the factory with a 472 cubic inch (7.7 liter) 16 to 1 compression 2 cylinder diesel engine. The tractor weighs 12000+ pounds and the sled it's pulling weighs over 30000 pounds.
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