sight glass seals Europiccola anni '60
The upper retainer that holds the sight glass has undergone changes designed to facilitate maintenance. While the machines produced in 1962 have a cap screwed, the later machines have the upper retainer without the cap that allowing the introduction of the glass.
Over time the gaskets harden and there may be losses of water. You can temporarily solve the problem with further tightening the nuts.
To replace the seals, remove the sight glass. The old glass can not be reused because it has a diameter less than the current parts and therefore does not fit the new seals.
To replacing seals you need a new glass and 2 new seals.
Unscrew the two nuts with a wrench 17
with the help of rubber gloves, turn the glass pushing it upward until it is released completely from the lower retainer
to tilt the sight glass sideways, but if the seals have lost their elasticity, almost certainly the glass will break. If you want to save time I suggest you break it without try to removing it. Remove the brass washers and the old gaskets with the aid of a screwdriver. To remove the hardened rubber seal may be useful pushing with a screwdriver rotating counterclockwise
Clean the parts to be reused and collect all the parts need for mounting
it may happen that the new glass is longer than the original, in this case you should seek the help of a glazier to shorten it about one mm
insert the new seals and washers in the retainers
prepare the sight glass with the protection and nuts inserted in the right way
iinsert the glass in the upper retainer and then push down into the lower retainer
it may happen that the new gasket is not compressible and
does not allow to screw the nut. For this I recommend to reduce the
thickness with a cutter.
Finally, tighten the lower nut and then the upper nut
fill with water, heat the water and tighten the nut if necessary
© 2011 Francesco Ceccarelli. All rights reserved.