The PTFE tape worked well for all the piston rods and valve rods so thats cool. Not so cool I managed to break a 10ba bolt in the rear cylinder end where the slides are bolted, so it means I need to remake that again as well as the screw that goes on it Not sure about piston rings as yet, but I am sure I will sort out something as we go along, lolGTB wrote: ↑Sun Jun 02, 2019 12:48 pm Forgot to mention.....
O-rings can vary a little in dimensions, so if the piston is too tight and hard to move when the o-ring is fitted, even when oiled, you may also have to shave a little off the depth of the groove in the piston.
It's one of those goldilocks things, the o-ring fitting has to be just right.
Graeme
Another Wild Rose Project
- -steves-
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Re: Another Wild Rose Project
The buck stops here .......
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Re: Another Wild Rose Project
Been there, done that, got the t-shirt. It doesn't take much force to shear the head off a 10BA screw......
They usually shear just below the head, so if there is enough thread left to grip, it may be easy to unscrew the stub of thread, as it isn't usually under any tension once the head is off.
Graeme
- -steves-
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- Joined: Thu Jul 28, 2011 1:50 pm
- Location: Cambridge & Peterborough
Re: Another Wild Rose Project
Unfortunately not, the bolt bottomed out on the glange thread below it, the bolt was about .3mm too long and snapped off seemingly just below the top of the hole and is under full tension From what I can see no way to get it out at all Ah well, put it down for a few days and go back to it next week, again, lolGTB wrote: ↑Mon Jun 03, 2019 4:26 pmBeen there, done that, got the t-shirt. It doesn't take much force to shear the head off a 10BA screw......
They usually shear just below the head, so if there is enough thread left to grip, it may be easy to unscrew the stub of thread, as it isn't usually under any tension once the head is off.
Graeme
The buck stops here .......
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Re: Another Wild Rose Project
I am pretty sure you can desolve the bolt with aluminium phosphate (i think) and it does not affect the brass, i have done this before in a dish on the stove. be warned, it smells.....
'Professional Bodge artist '
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