Re Gauging to 4 3/4" from 5" gauge.

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Joined: Tue Jun 21, 2011 2:53 pm

Re: Re Gauging to 4 3/4" from 5" gauge.

Post by FRED DADDI » Wed Jan 31, 2018 9:50 pm

FRED DADDI wrote:I have an ancient setbof sweet pea drawings ill have to find them.....

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Dug out both sets of drawings sweet william has dims for 7 1/2 and 7 1/4. Sweet pea is just for 5" gauge. Clearance looks like 3/16" per side neglecting the axle box flanges. Too close I think

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Cary Stewart
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Joined: Wed Jun 08, 2011 5:54 pm

Re: Re Gauging to 4 3/4

Post by Cary Stewart » Fri Feb 02, 2018 5:55 pm

For this conversion much depends on the engine and how big the frame or boiler dia. is. My Thunderbolt/Lion, ex the late Bruce Ward, is converted from 5" gage to 4 3/4" gage. The boiler dia. just made it possible. I do not know exactly what was done in the conversion but it worked. The splashers will not fit anymore. Probably the most challenging thing was probably the need to make a new main driving axle which contains all the valve eccentrics and inside piston throws. The engine runs very well. You would do well to purchase a set of the drawings for the particular engine you want to convert. Now if you have already purchased the engine...........

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