Hello again johey:
johey wrote:... not leaking at the moment. Was just thinking about cleaning it.
However, I don't really get how you mean. The top house is solid with no opening at the top. Seems like it is welded ...
Exactly, it was probably brazed to the side of the boiler
before the chrome and polish job, but certainly not with the glass tube in place. =^)
My 'Shirley' is from the mid 60's also and here's what the top boss looks like:

I find this to be a much better system: one nut less to tighten, one less gasket, another possible leakage avoided.
If you look closely, my 'Shirley' does not have (unfortunately) a stainless sight-glass guard. Her original one was plastic and I removed it because I thought it was not up to the job. So I replaced the original sight-glass with another one the same OD but smalle ID. ie: thicker walls.
It's really not essential to have an opening at the top boss to remove the sight-glass in these models.
As you can surely imagine, if it
went in it can
come out.
What I do know for sure is that it means a bit more more work.
The top boss in these early models has more room to
slide up/in than the bottom boss. This makes it possible to slide the glass tube upwards till it can go no further and when you get there, slowly and carefully move it sideways to pull it down and that's about it.
The reverse operation is what you need to do to put it back in. Of course, new, pliable gaskets are a plus as the originals ones may not leak but that's probably because they are welded to the glass and it's essential that the sigh-glass replacement be the exact length. Too long it may not go in. Too short and it may not seal properly.
Like one of our more knowledgeable correspondents has pointed out ...
orphanespresso wrote:That one is a standard La Pavoni difficult job.
If I may add to that: it's also the
most annoying of all. =^/
In any case, all you have to do it follow his very well written instructions carefully and you'll get there.
Of course, Prudence and Patience will be your best girlfriends while at it.
Just leave out the part about "
The glass comes out the top to the housing ... ".
Cheers,
CIV