I have been collecting photos of steam traction engines for 51 years. However, being an old engine 'photo junkie' has yielded some nice gas, kerosene and oil tractor pictures over the years. Several of the gas tractor pictures were commonly given to me as 'steam engine' pictures.
The photo below shows my grandfather Frank A. Yaeger's first tractor, a 30-60 Aultman & Taylor, pulling wagons of grain from the farm to Glengarry, Mont. The engine was an early one, serial number 47, built in 1910. Fritz Yaeger is on the tractor, grandpa Yaeger is in the derby beside the first wagon wheel and grandma's cousin, Albert Russi, is beside the second wagon. The year was about 1914.
I am not certain when Aultman & Taylor quit producing this type of square radiator with exhaust-draft cooling stack, but I think it was around 1916. They started installing rear fenders around 1912. This model was equipped with Aultman & Taylor's 'pneumatic starter.'
The inset photo is a side view of the pneumatic starter compressor (with wooden handle removed) showing the intake (bottom) and exhaust check valves and piping to the engine. At the risk of appearing ill informed as to how the starter operated, I will repeat what my dad repeated many times to me years ago.
The engine was turned over to where cylinder number one (of four) was ready to fire, where a dog dropped into a detent in the crankshaft. The magneto impulse was set, gas was poured into each cylinder through the priming cups, the air tank was pumped up with the pictured pump and the crankshaft dog was extracted. Theoretically, the engine was now running!
Contact engine enthusiast Gary Yaeger at: 1120 Leisha Lane, Kalispell, MT 59901, or e-mail: firstname.lastname@example.org