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Stationary Engine List

Repairing Cracked Hubs

| February/March 2002

  • Stationary Engine

  • Stationary Engine

A brief update on the December cover story about the B.D. Tillinghast half-breed: Tillie has finally made her journey across the pond, arriving safely the beginning of December. At some point her crate suffered a close encounter with a fork lift, evidenced by two neat holes punched through the end wall of the crate, just either side of the head of the engine, but not causing any damage. Dismantling the crate was cold, but fun, and by the end of the day Tillie was sitting on our trailer.

Now to business. Some time back I ran an article about running an engine with a flywheel that had a cracked spoke. Much of the discussion at that time centred around safety issues, but this time we have a different sort of crack, on the hub, and the solutions presented were interesting, as one might expect. As ever, the following comments reflect a variety of opinions that surfaced during this discussion.

I just got the cracked flywheels from my 2 HP earl-style Galloway back. They were repaired by a welder who has 20 years experience. I made sure the flywheels went on easy, inserted the key, and as soon as I started tapping it in, it cracked in both places again. The other wheel seems to be okay, for now. Anyway, I will go with this for now and look into new cast flywheels when I win the lotto.


That wheel can be welded, but it will need to be in a hot bed to stress-relieve it 'til cold, and it should have a lot of peening while cooling - DON'T run it cracked.

I have seen a flywheel that had a cracked hub come off the crankshaft at a show, which I gather is the problem given the description of the fitting and subsequent cracking as the key was inserted. Shrink a ring on it and be done with it!


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!

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