John Deere Model 40 Crawler out after sitting for nearly 20 years. This bulldozer has been in my family for 70 years after my Grandpa bought it for his trenching business. The last time we used it was the early 2000s but it is time to get it out and fix it up! The John Deere Model 40 was John Deere's first attempt at making an industrial crawler. It has a twin cylinder gas engine with about 25 horsepower.