Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Builds, Repairs, Show Your Machines! => Technical Tips, Builds, and Help => Topic started by: SeeSteam on August 10, 2019, 08:39:42 am

Title: Re: Need more pressure on vintage Bing feed pump
Post by: Dr.Rev.DelmarMacReady on August 10, 2019, 05:46:36 pm

Hris, I was thinking about this and I'd bet if the piston was worn enough to warrant building it back up, it is likely the cylinder is just as worn. A possible solution is boring the cylinder out back to round, and hone. Then replace piston with a suitable, and perhaps upgrade with a groove for an o-ring or such.

Title: Need more pressure on vintage Bing feed pump
Post by: SeeSteam on August 10, 2019, 08:39:42 am

I built up (babbitted) the “piston” so now it pumps. The valves work and they hold back steam pressure and when the boiler cools after with the valves closed, the vacuum will draw the reservoir empty. (A neat sound it makes when it happens, sounds similar to a steam injector.)

Just thinking about it, why was the shiny area of the gland made smooth like that? Is it possible a rubber boot went there? Any other ideas?