Member postings for Peter Grigg

Hello again Steve: I agree there must be a slot or it will bind. My plan is to start with a hole and then file it to a slot so as to relieve and binding.

Thanks again, Pete Grigg

I give up. How can i change my password?

peter grigg

Hello Steve: Many thanks for the hints and especially for the drawings and the photos of your very excellent Rob Roy. 1. The hint about drilling the valve stem while installed: a really good suggestion. 2. The photos show there is a slot where the actuating mechanism couples to the bar that moves the levers. The slot = not apparent on my drawings. 3. Your advice / warning about the eccentric coupling and the front axle: Alas, too late for that as I have already installed it and seen the collision with the horn block. Now working on a fix for that. 4. The blast pipe relocation now noted in my book however so thanx in advance for that.

I very much appreciate your help on this. If any more issues arise I'll be back in touch.

Cheers, Pete Grigg

Hello Steve and thanks for your reply. My copy of the Rob Roy book has a poorly printed version of the drawings for the cylinder drain cocks. The linkage i think i can figure out. But here are my uncertainties: btw i refer to the drain cock body, the valve stem, which is turned to open/close the drain, and the cock lever, which actuates the valve stem.

1. Diameter of the valve stem? And what is the size of the hole in it?

2. Where the cock lever attached to the valve stem: a square hole in the lever, and file the end of the shaft square to fit?

3. Does the cock drain downward, i.e., straight thru, or is there a side tube directing the flow to the side?

Any help will be much appreciated. Many thanks in advance!

Cheers, Pete Grigg

I am from Worcester Mass. And where i have questions is the cylinder drain cocks. If anybody has made them i'd like to ask a few questions.

I am a new member and am about 1/2 way through building a Rob Roy locomotive. I have some problems because poor quality of drawings and need some consultation.