I seem to remember some discussion here a while ago about the best medium for sight feed glasses, what were the conclusions? I'm sorting out some niggles on a big Crossley 2-stroke (HLM4) at the moment, one job which needs sorting is the sight feeds for the cylinder lubricators (It has pressure feed for the crankshaft etc). The book says brine or glycerine, with a wire through. The ones which have anything at all seem to have brine, with a thread through. Any views?
Thanks Tim