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Antique Gas Engine Discussion

Hercules piston specifications

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Old 08-29-2005, 09:04:08 AM
Mike D1 Mike D1 is offline
Join Date: Aug 2005
Location: Salem, Oregon USA
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Default Hercules piston specifications

I have come across a large mixed lot of pistons that I am having difficulty identifying. US military WW2 surplus stuff. Anyone have access to specs on Hercules, Continental, & Wisconsin piston specs? The cast iron pistons are a real challenge to ID, as very few of the aftermarket mfg's made much in the way of replacements on these. I have an extensive library of vintage engine parts going back to the teen's, but most of these do not show in the spec. sections.
For instance - I have a 4.25" cast iron piston, 5.475" long, has a 1.25" wrist pin with keeper grooves in piston. Ring grooving is 1-3/32" compression (deep groove), 1- 1/8" compression, & 2 - 3/16" oil rings. Not listed in any of my piston books, but Sealed power does show rings for a WXLC3 Hercules that meets the ring dimensions.
Inside of the piston is cast "DELUXE" "492" "GC359", & "240" - do not show in any interchange guide I have.

---- Any help would be appreciated!

Thanks - Mike
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