Started up my machine last night and heard a spray of liquid. Shut it down and removed the rear cover to inspect. The small tube that the factory installs on these Chinese tubes between the output lens and the main tube failed. You all may have already noticed that this tube is not the best. Mine almost looked like it had been chewed through from the outside. The propylene glycol coolant I use is sweet, so perhaps a mouse wanted a drink. I did not see any mouse droppings, so I don't know if that is what happened. If it was not a mouse, then perhaps there was a bad reaction between my coolant and the type of plastic used by the Chinese. The spray went all over my electronics and into the laser power supply while it was energized!!
. I opened everything up and dried it with paper towels and a hair dryer.
To repair the tube I used a piece of Tygon. I replaced both input and output sides. My Tygon is the standard milk grade type B-44-4X. Once warmed in boiling water it is easy to bend and flex over the nipples. Leak fixed and I'm back in operation. - Got very lucky this time!! http://www.tygon.com/tygon-traditional-tubing.aspx