Sat Jul 19, 2014 7:21 pm
Is air leaking out of the regulator body, or do you mean a HP seat leak that causes the second stage to begin leaking? If an external leak is heard, put it on a tank and submerge the whole first stage to see where it's coming from. Most likely just an o-ring causing external leaks. Leaks often originate under the inlet module that screws into the body and holds the yoke in place. No special tools need for unscrewing that carefully with a large wrench. The oring is a standard 010 or 011, can't recall which, but it's a standard size available even at hardware stores. Another likely place is around the main body or out of the adjustment screw area, from air leaking around the diaphragm. It takes a special type spanner to tighten that without damage to the metal, but even those aren't hard to find. Of course the swivel area orings would always be suspect, but I usually found more leaks at the other listed places.
You should be able to find a schematic in the manuals and catalogs section of this website that will show the locations of the O-rings and give you some idea what to look for inside.
A leaking HP seat is also common, but will require the above listed spanner to access the insides. There was more than one type seat used in those, having slightly different dimensions, so refer to the Dacor manual area and look for the "high pressure seat" pdf listed there for measurements. VDH may be able to obtain a repro seat from Trident. If it's not available, figure out which seat it is from the chart and let me know.
Those aren't as complicated as they look at first so don't be discouraged because almost no one works on them. Of course you should have some tools and mechanical skills to get into your own reg, and if unsure have someone else tackle that for you.
The older I get the better I was.