1917 600 HP Snow Engine Finds Home at Coolspring

It took 20 years, but this 1917 600 HP Snow engine finally calls Coolspring Power Museum home.

| August/September 2014

  • The 1917 600 HP Snow gas compressing engine, all polished and oiled, waiting for its debut at the 2013 Coolspring Power Museum Summer Exposition.
    Photo courtesy Paul Harvey
  • Roystone Station in 1963, which remained much unchanged until 1993.
    Photo courtesy Paul Harvey
  • Coolspring's Snow engine at work in 1963.
    Photo courtesy Paul Harvey
  • Our engine with some parts already laid out on the floor. Not that the compressor cylinder has been removed and is hanging on the manual chain-fall crane to the rear left. It was then transferred to the front crane and traveled to load onto our truck.
    Photo courtesy Paul Harvey
  • Heating the "dogbone" keys red hot for expansion and then pulling them out with a manual chain puller.
    Photo courtesy Paul Harvey
  • A flywheel half, weighing 9 tons, loaded onto Paul's dependable old "tilt-bed," a 1976 International 2070A Fleetstar with a 290 HP Cummins engine and 9-speed Roadranger transmission. Note the size of the doorway that the entire engine had to come through. Everything came home on this truck except the 34-ton main frame.
    Photo courtesy Paul Harvey
  • The main frame jacked out of the foundation, awaiting rollers to take it out of the building.
    Photo courtesy Paul Harvey
  • With the huge casting just outside the station, the Smith crane was able to lift it and place it onto their trailer.
    Photo courtesy Paul Harvey
  • Unloading the main frame to the place where it would spend many years.
    Photo courtesy Paul Harvey
  • The compressor cylinder ready to be unloaded into Knox Station. Again, a small doorway and unsupported floor were encountered, which required using a 10-ton manual chain hoist to position the parts. Interestingly, this structure originally housed two massive National Transit gas engines, and their foundations provided stable support for our storage purposes.
    Photo courtesy Paul Harvey
  • Removing the framing of the foundation.
    Photo courtesy Paul Harvey
  • The big test: With the aid of Smith Hauling again, setting the main frame
    Photo courtesy Paul Harvey
  • A satisfied crew with the 10-ton compressor loaded onto the old "tilt-bed" truck for the short trip back to Coolspring.
  • The cylinder base plate and rear crosshead casting in place, and the rear power cylinder being lowered into place by the Lorain crane.
    Photo courtesy Paul Harvey
  • The Lorain lowering the crankshaft into place.
    Photo courtesy Paul Harvey
  • The new structure completed and prepared for the coming winter.
    Photo courtesy Paul Harvey
  • Installing the igniters.
    Photo courtesy Paul Harvey
  • Chris manning the controls while the crew watches the Snow being fired up for the first time.
    Photo courtesy Paul Harvey
  • The top half of the flywheel lowered into place.
    Photo by Paul Harvey

More than 45 years ago, I stumbled upon Roystone Station, which was located on US Route 6 between Sheffield and Ludlow, Pennsylvania. I was a young engine collector then, just beginning to explore the vast oil fields in northern Pennsylvania to search for old engines. Seeing the magnificent brick and steel structure, I was lured to stop for a visit and there I found many great gas engines in operation, including the Snow engine now displayed at the Coolspring Power Museum.

Roystone was the main station of the Pennsylvania Natural Gas Co. based in Warren, Pennsylvania, which is now part of the National Fuel Gas Corp. The old station is now gone and a modern one has been built. Presently it serves as a storage field in which the gas is pumped into the ground from western suppliers in the summer to be recovered and used in the winter. It originally pumped from the local fields, and this gas was then sent to the Buffalo and Rochester, New York, markets to be distributed for home and industrial use.

In the mid 1970s, and with no definite plans besides the desire to save one of the big Snows, I started a lasting relationship with the plant engineers and local administration, and was happy to find them receptive to the idea. Finally, in late 1992, I was invited to come to Roystone to witness the last working day of our Snow. Shortly thereafter, I met to sign the documents on behalf of the museum to make the Snow ours. We now had the winter to remove it: to disassemble and transport a 140-ton machine and place it in safe storage until it could be assembled again. This would turn out to be a 20-year project.


The volunteers from the museum took the task seriously. Six or eight of us would trek to Roystone over many weekends. The first step was disassembling the engine. The compressor cylinder was removed and transferred to the front crane and traveled to load onto our truck. This was a tedious and labor-intensive project that frequently required six people to pull the hand chain to lift the heavy parts since the hoists were entirely manual.

The next task was to remove the flywheel from the crankshaft. The wheel weighed 18 tons and split into two halves. It was held together at the hub by four huge bolts, 4 inches in diameter, and at the rim by four cast iron keys or “dogbones.” Removing the flywheel proved to be a challenge. We heated the keys red hot for expansion and then pulled them out with a manual chain puller. Each dogbone weighed about 150 pounds and had to be supported with the overhead crane. We then found that they were a bit different in length so they were carefully marked for reassembly.

The main frame for the engine was a huge project. We jacked the engine out of the foundation and placed it on rollers to get it out of the building. The crankcase bottom extended 1 foot below the base. This, in addition to 10 feet of unsupported floor between the engine foundation and building footer, required a huge amount of timber blocking to get out of the low, narrow doorway.


Gas Engine Magazine A_M 16Gas Engine Magazine is your best source for tractor and stationary gas engine information.  Subscribe and connect with more than 23,000 other gas engine collectors and build your knowledge, share your passion and search for parts, in the publication written by and for gas engine enthusiasts! Gas Engine Magazine brings you: restoration stories, company histories, and technical advice. Plus our Flywheel Forum column helps answer your engine inquiries!

Be sure to take advantage of the Square Deal Subscription Program.

  • No Missed Issues.

  • No Renewal Notices.

  • No Additional Cost.

The Square Deal Subscription Program is designed as a paperless transaction with automatic renewals at a preferred low rate.   With advanced electronic notification, a 100% satisfaction guarantee and an easy opt-out plan, the Square Deal Subscription Program is the best value, risk free, eco-friendliest way to subscribe.

Facebook YouTube


click me