Ossie Cylinders
Ossie Cylinders
Have been trying to sort out some of the bits on my collins pixie, having sucessfully raised pressure and not melted the paintwork, I have a few steam leaks.
Main ones are from the cylinders against the steam chest (not sure if this is the right term) but basically between the wobberly bit and the fixed bit.
I assume there isnt supposed to be anything inbetween the two and the faces probally just need cleaning up. Is the best way just with a bit of wet and dry sandpaper (2500 grit?)
Main ones are from the cylinders against the steam chest (not sure if this is the right term) but basically between the wobberly bit and the fixed bit.
I assume there isnt supposed to be anything inbetween the two and the faces probally just need cleaning up. Is the best way just with a bit of wet and dry sandpaper (2500 grit?)
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- Trainee Driver
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If it's that old, and there isn't any foreign substance in between the cylinder and the port face, perhaps the trunnion springs have lost their temper and aren't as "springy" as they used to be? It doesn't seem to me that after 24 years the port faces would need lapping, but I'm new, I might not know any better.
- Sir Clothem Cap
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- Tony Bird
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Hi,
It is possible that it is not the port faces that are worn. Sometimes if either the crank pin or the trunnion pin on the cylinder block aren't square as the cylinder oscilates it gets lifted of the port face so letting steam escape. Also the crank shaft not being at right angles to the port face can have the same effect. Try rotating the crank shaft by hand and see if the cylinder stays on its port face.
Regards Tony.
It is possible that it is not the port faces that are worn. Sometimes if either the crank pin or the trunnion pin on the cylinder block aren't square as the cylinder oscilates it gets lifted of the port face so letting steam escape. Also the crank shaft not being at right angles to the port face can have the same effect. Try rotating the crank shaft by hand and see if the cylinder stays on its port face.
Regards Tony.
Thanks I shall have a look - thats some great info that i hadnt thought ofTony Bird:49205 wrote:Hi,
It is possible that it is not the port faces that are worn. Sometimes if either the crank pin or the trunnion pin on the cylinder block aren't square as the cylinder oscilates it gets lifted of the port face so letting steam escape. Also the crank shaft not being at right angles to the port face can have the same effect. Try rotating the crank shaft by hand and see if the cylinder stays on its port face.
Regards Tony.
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