Re: A Tale of Two Patricians

Posted by Packard Don On 2019/6/13 19:25:15
The Treadlevac vent hole that we've been discussing is apparently there to return any fluid that might make it passed the piston but I'm not sure how it does that when it would mean that the fluid would have to go uphill about an inch in order to return to the reservoir. I'm sure that the system would work just as well without it,

In any event, for those who don't know what we're talking about, here are some photos. The first shows where it comes out at the reservoir and the second shows where it goes into the shaft bore. At the top it is about .200" dia and it breaks through, as I mentioned above, just ahead of the snap ring groove. In fact, it appears to break into the groove very slightly.

The larger hole seems to go down to the same level as the counterbore on the mounting surface that is visible in the photos but it appears to have been done using a tapered reamer rather than being relieved using a larger drill as I had said. I can't see that one is better than the other but I'll probably do it using the reamer as it's actually easier. I forgot to get the measurements needed to calculate the taper required but will try to do so while I'm here.

As for the gasoline, I took out close to 11 gallons so the tank wasn't full but that's still more, and in better condition, than I expected. It looked clean too but not good for any engine as a sample that I set afire under controlled, safe conditions burned readily but didn't go whoosh as it should have. Instead it burned with a heavy, black acrid smoke that would definitely build up in places where it shouldn't inside an engine and cause all sorts of grief.

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