zack8078 Senior Member Joined: 10 Nov 2012 Posts: 1 Location: Durham, CT Expertise: Just starting
Posted Sat Nov 10, 2012, 2:44am Subject: Need advice, novice is rebuilding LSM 85-16m
Iíve recently come into 2 La San Marco 85-16ms, one is a two group and the other is a three group - I paid $100 for the pair. The three group mostly works, with some minor leaks, except that one of the groups doesnít work at all. The two group machine is a parts machine, as far as I know, but it may have potential. Anyways I've searched through lots of posts, and I haven't been able to find the answer to my predicament.
The first thing that I did was to get the machine wired and plumbed so I could evaluate it. And like I said, it all works except one group. Since the machine mostly works, Iíve started disassembling it. But, Iím stuck on a descaling strategy. Iím trying different methods on scrap parts from the extra machine. Iíve tried an ultrasound with soap Ė not much progress at all. Iíve tried a diluted CLR solution, which just seemed to galvanize some copper onto the (chrome/nickel?) parts. Iím considering trying separate HCL baths for the copper and non-copper bits. Iím kind of lost here and hoping someone might point me in the right direction to a sensible descaling strategy. I should point out, it is FILLED with scale. It must have been on well water or something....
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 7,672 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Vene. A1, La Cimbali M32 Grinder: Azkoyen Capriccio, Major Vac Pot: 40s era Silex Drip: Msl. Com. brewers Roaster: gave it a try, decided no
Posted Mon Nov 12, 2012, 9:22am Subject: Re: Need advice, novice is rebuilding LSM 85-16m
Nice pickup. Citric Acid is the pretty much norm for non industrial descaling. Industry has their own heavy duty baths and one can not dispute the effectiveness of them but for the average home owner or handyman (which is what we fall into) those chemicals are a little beyond us. Citric Acid works well and is safe. Make a solution and soak your parts in it, rinse and reassemble.
In real life, my name is Wayne P. Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!
Feed the newbs, starve the trolls and above all enjoy what you drink!
Posted Wed Nov 14, 2012, 2:00pm Subject: Re: Need advice, novice is rebuilding LSM 85-16m
I had the same issues when I bought my old VFA. I found that 50/50 CLR & Water or the same with vinegar worked wonders. I dunked all of the copper and groupheads separately and left them to soak overnight. I then used a nylon brush to remove what was left in the groups and reassembled. My groups were chrome plated brass and nothing happened to them. As for the boiler if you need to clean it out I'd recommend getting it professionally acid dipped.
Citric Acid I found only works to get rid of coffee grum. I would bet that the reason the one group doesnít work is due to calcium buildup. Cafiza won't budge it.
When you reassemble if you want to really make it shine take some emery cloth to the outside of the pipes and a brass rotary brush after to the copper pipe.
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.