A pair of Rumely OilPull models built and owned by Jim Patton, Hiawatha, Iowa. In front, a double cylinder model completed in 1986; in the background a single cylinder design done in 1980. Behind the OilPulls is an Eagle 6 tractor owned by Richard Grimm,
Figure 1 : For his double cylinder OilPull model, Jim Patton used lightweight aluminum pistons and fabricated entirely new connecting rods from steel tubing. This eliminated many of the problems in balancing the engine. The finished tractor shows very lit
Figure 2 : Jim Patton at the wheel of his single cylinder OilPull model. Completed in 1980, it has been displayed at a great many shows and has walked through lots of parades.
A 1985 photograph shows the double cylinder OilPull engine under construction. Two Fairbanks-Morse 3 HP 'ZC' engines were used, with the two cranks welded together. The two engine frames are mounted on a heavy steel plate to maintain alignment a
By early 1986 Jim Patton's double cylinder OilPull was nearing completion. Shown here is a head-on view from the operator's platform that illustrates the general arrangement. Although both models are equipped with rubber tires and use modern technology wh
At this point in time the two engine frames have been aligned and mounted to a heavy steel plate. The crankshaft has been installed, and trial counterweights are attached to the crank throws. After some experimenting and adjusting of the counterweights, a