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La Marzocco Linea Mini, non-stick steam and water knobs

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I have had my LMLM for a year now and ever since day one been annoyed by the fact that the steam and water knobs tends to stick when tightened up in the closed position. They are basically designed like a nut on a bolt. So if you want to do a quick steam-off by turning the knob clockwise it will eventually keep turning until the end of the thread - and tighten up against the "bolt head".

So I wanted to get rid of this daily annoyance using an otherwise super cool and certainly well designed machine!

I solved the problem by inserting a home made two turn helical coil in the knob thread. Make sure you clean off all grease off of all parts. Then carefully dremel away the run-out of the thread on the counterpart on the valve. See pictures below. Then adjust the placement of the coil so that it will block further rotation JUST after the valve closes but before hitting the end of the thread. Then fix the coil in the thread with low viscosity superglue or thread lock or whatever. And before reassembling the parts remember to grease all parts again to ensure propper function.

I am really happy with this fix as it is relatively simple to perform and super robust - this is the way it should have been designed ?

Video clip of before and after


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Nice fix. Glad you’re happy with the result.

Sent from my iPhone using Tapatalk

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ECM Synchronika, Kafatek Monolith Flat, Niche Zero, Pullman Bigstep Tamper, ONA OCDv3 Distribution Tool, VST 18g & 20g Ridgeless Baskets, Acaia Lunar Scales, LW Bean Cellar & Caddy, Aeropress, Aergrind, notNeutral Cups

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