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Thread: Upgraditis: 2-group Grimac Commercial

  1. #251
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    Re: Upgraditis: 2-group Grimac Commercial

    Good advice, Javaphile. And its such an easily accessible and dimountable little unit to work on too.

    -Robusto

  2. #252
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    Re: Upgraditis: 2-group Grimac Commercial

    The intermittent sticking of the vacuum break valve hopefully is no more.

    Today I removed the valve, made sure the surfaces inside were smooth, removed the small O-ring which sticks, and replaced it with one from my collection. An ever-so-slightly smaller one which therefore wont grab the sides and prevent the piston falling to break the vacuum.

    So far so good.

    -Robusto

  3. #253
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    Re: Upgraditis: 2-group Grimac Commercial

    Quote Originally Posted by robusto link=1173088713/240#251 date=1178005278
    Today I removed the valve, made sure the surfaces inside were smooth, removed the small O-ring which sticks, and replaced it with one from my collection. An ever-so-slightly smaller one which therefore wont grab the sides and prevent the piston falling to break the vacuum.
    -Robusto
    Robusto....

    Might have to give an "ever-so-slightly smaller one" a try myself.... I didnt have the problem before I renovated the machine until I replaced the O ring.... and the one which was supplied did look a little bit larger (I put it down to being new)..... so maybe it might be grabbing the sides as you suggest.

  4. #254
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    Re: Upgraditis: 2-group Grimac Commercial

    Well I finally replaced the O ring with a slightly smaller one.... and it seems a bit softer as well.

    It does seem more free- and so far the vacuum break functions correctly.

    Fingers crossed.

  5. #255
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    Re: Upgraditis: 2-group Grimac Commercial

    Well done, JavaB. Its one of the most simple though satisfying things to do.

    The valve is sooo simple too. The piston retracts by gravity to break the vacuum....or lifts by steam pressure to close off the boiler. No calibrated springs. Just gravity and its tiny weight.

    So any slight obstruction like a swollen o-ring will have a major negative impact on its performance.

    --Robusto

  6. #256
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    Re: Upgraditis: 2-group Grimac Commercial

    Things move at snails pace sometimes at the Robusto household -especially when it comes to taking the hole saw to the kitchen bench top.

    But I woke this morning and decided it was finally time to route the Grimacs hoses THROUGH the bench top, not across it, and over the top of the cupboard doors which were no longer able to close as a result.

    It was with trepidation that I put the hole saw in the drill chuck -- what if we decided to move house. What if we got sick of the machine taking up so much precious bench space. Wed be stuck with a gaping 50 mm hole in the bench top.

    After a few careful measurements on and under the bench, drilled a pilot hole, made sure it came out where it should, and within seconds a nice neat hole followed.

    That was the easy part.

    Poking through the long braided mains water hose was also effortless. Along with the power lead.

    The drip tray hose was a pain. At 1.3 metres it was too short to reach the stubby barb connector on the elbow bend. And in any case, that was already dedicated to the dishwasher waste outlet.

    A trip to a specialist plumbing chain proved fruitless. Bunnings, as always, also proved useless for specialist equipment. But I had success, more or less, at a specialist garden irrigation shop.

    After several hours of running around, twisting and screwing hose ends, clamping etc, everything is plumbed in nicely, out of sight.

    The filthy dirty waste tank under the sink is gone. It was OK in summer when we utilised the water for the garden, but even the new 3300 litre rainwater tank is full now.

    A slight repositioning of the machine has given back to Mrs Robusto some bench space.

    The under-sink cupboard doors close once more.

    And its only taken 4 months. At this rate Ill soon complete tidying up the PID wiring on the Silvia to get it ready for a much overdue sale.

    --Robusto



    First, we had to try the Grimac, so we used a water tank and bucket for the drip tray.

    Satisfied it worked well, we moved it in situ and hooked up the water hose to the tap under the sink....and the drp tray still emptied into a bucket.

    But we cheated, routing th hoses

  7. #257
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    Re: Upgraditis: 2-group Grimac Commercial

    Good to hear it is finally installed - as it should be. ;)

    I tested mine up in the shed..... and when satisfied all was well - did all the plumbing and electrical work so it went straight into its new home (and has lived there happily and functioned perfectly ever since.

    So much better when you dont have to empty a bucket (especially if you forget do do it in time! :-[)

  8. #258
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    Re: Upgraditis: 2-group Grimac Commercial

    Yes, JavaB, so much better.

    We justified the old system by thinking we were being water wise, catching the waste water instead of seeing it go down the sink.

    My fear constant fear was that as I carried the bucket through the family room carpet, it would spill....with disastrous consequences.

    The only thing left to do now is acquire and install an in-line water softener. Lucky our water is already relatively soft, so Ive gotten away without one thus far.

    --Robusto

    --Robusto

  9. #259
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    Re: Upgraditis: 2-group Grimac Commercial

    Good on ya mate...I love having the machine plumbed up...I had the same problem, so I used some odd fittings and some Sikaflex (which I once built a small boat with a big motor from...completely..no screws, but thats another story).

    Cheers.

  10. #260
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    Re: Upgraditis: 2-group Grimac Commercial

    ...its great being able to clean the baskets under the hot water outlet and do everything requiring water at the machine and it all flushes away!

  11. #261
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    Re: Upgraditis: 2-group Grimac Commercial

    Certainly is, Ozscott..... On another matter, you mentioned that word, Sikaflex which Ive been coming across lately.

    The perspex windows on my boat leak during rain spells. I dread to think whats happened over the last fortnight where the Gippsland lakes have had some 300 mls of rain. Cant even get to it because the jetty is underwater. Now, would Sikaflex remedy the problem of window leaks once and for all? Bearing in mind Perspex expands and contracts.

    Is it flexible?

    Thanks, RObusto

  12. #262
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    Re: Upgraditis: 2-group Grimac Commercial

    Quote Originally Posted by robusto link=1173088713/255#260 date=1183801456
    Certainly is, Ozscott..... On another matter, you mentioned that word, Sikaflex which Ive been coming across lately. T

    he perspex windows on my boat leak during rain spells. I dread to think whats happened over the last fortnight where the Gippsland lakes have had some 300 mls of rain. Cant even get to it because the jetty is underwater. Now, would Sikaflex remedy the problem of window leaks once and for all? Bearing in mind Perspex expands and contracts.

    Is it flexible?

    Thanks, RObusto
    Nice to see you active again Robusto. Sikaflex is a great brand and they have a variety of products, one of which will be certain to meet your needs. They are wonderfully flexible, durable and absorb shock without losing any integrity at the joint.

  13. #263
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    Re: Upgraditis: 2-group Grimac Commercial

    Thanks, Dennis. Ive been using silicon sealants but to absolutely no avail. No matter how much is put on, the leaks persist to the detriment of the wood underneath. Its not the salt water below the waterline which rots boats -- but the rain water above.

    -Robusto

  14. #264
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    Re: Upgraditis: 2-group Grimac Commercial

    You dead right Robusto....the trouble with silicon is that its not grippy enough. Sikaflex do a marine grade sealant. It comes in black, white etc, but not clear. It will seal out the rain, but just remember that its almost impossible to get off - ie if you want to replace the perspex you will be getting the sika out with a chisel!

    Having said that most old perspex windows have rubber seals that require a screwdriver to get out anyway. I have armour plate on the windscreen on the Seafarer, but perspex in the cabin windows and mine are about to get treated to Sika to seal them and 3M perspex polish and the orbital polisher.

    Cheers

  15. #265
    Senior Member ozscott's Avatar
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    Re: Upgraditis: 2-group Grimac Commercial

    It flexes a long way. The best way to smooth it out is spit on the finger and wipe in it after applying with the gun...and plenty of acetone to clear up the fingers later.

    Cheers

  16. #266
    Senior Member ozscott's Avatar
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    Re: Upgraditis: 2-group Grimac Commercial

    I know buildings in Brisbane whose multi story drain pipes are held on by Sikaflex.


  17. #267
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    Re: Upgraditis: 2-group Grimac Commercial

    Up until I put the new seal in the Bezs boiler sikaflex was helping a weeping seal- Pedro at coffeeparts suggested it. Worked well for a while...
    Brett

  18. #268
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    Re: Upgraditis: 2-group Grimac Commercial

    Yep,

    Sikaflex is great stuff, also known as the Yachtys Friend I believe ;). Was working in a location high up in the PNG Highlands about a decade ago where the rainfall averaged about 12 Metres a year :o... needless to say, the Sikaflex got a good workout up there, sealing everything from Industrial Electrical Panels to Large Water Pump Hose Clamps. Wonderful stuff,

    Mal.

  19. #269
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    Re: Upgraditis: 2-group Grimac Commercial

    For those weeping leaks you cant seem to find try Captain Tolleys creeping crack cure.

  20. #270
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    Re: Upgraditis: 2-group Grimac Commercial

    Thats all very interesting stuff, and of enormous help. Thanks everyone.

    Some leaks are fairly obvious--like some, but not all, of the window ones.

    Others are absolutely dumbfounding, absolutely NOTHING on the outside to indicate a breach in the paint even, let alone a sheath of epoxy and very thick plywood..... Yet, there are drips from the ceiling on the inside.

    Somewhat like channelling in a coffee puck, but no tell-tale break on the top surface.

    That makes them even the more dangerous, because the clandestine path to the interior often leaves a trail of rotting wood in its wake. Thats why I am loathe to plug leaks from the inside.

    --Robusto


  21. #271
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    Re: Upgraditis: 2-group Grimac Commercial

    Robusto, to the hilarity of the camping community i have been known to sit on the roof of the bus with an array of syringes, each filled with a different colour food-dyed water.
    each of the *suspect spots gets a small squirt of one of coloured waters and whatever colour ends up inside the bus tells me where it comes from.
    polka-dotted window frames? sure, but they are dry now!! :p

    i visited the captain Tolleys website and found that the stuff is not available in Oz, other than directly from O/S supplier/manufacturer or the UK Bay of Temptations.

    good luck *;)

    L

  22. #272
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    Re: Upgraditis: 2-group Grimac Commercial

    Great idea Lizzi! I guess you could also use some of the dye that plumbers use to trace leaks - wonderful non-toxic flouro green.

    Then again we might be talking about marine ply where just a few coats of marine varnish might help. Tell us more Robusto, or better yet, how about some pics?

  23. #273
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    Re: Upgraditis: 2-group Grimac Commercial

    You must be quite a sight Lizzie. But as you say, it works.

    Unfortunately, I cannot find the suspect external points of entry to take the syringes to them. Just unbroken areas of white paint.

    Dennis, the boat is oil-based paint on the outside, and parts of the interior, plus clear polyurethane. If Im feeling energetic next spring Ill sand back and re-paint the outside. Maybe in the process the roof leak entry points will reveal themselves.

    --Robusto

  24. #274
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    It's been some 5 years since I started this thread on the acquisition of my Grimac 2-grouper.

    Perhaps a quick update is in order.

    It still sits on the kitchen bench, next to the sink and taking up a lot of valuable real estate there.

    It's plumbed in to the water supply and the drip tray to the kitchen sink S-bend which also takes waste from the dishwasher.
    A couple of times, waste grounds have clogged that S-bend, so that when the dishwasher emptied, water had nowhere to go but up...up the small flexible hose from Grimac's drip tray.....spilling out all over the kitchen bench.

    The drip system is now regularly flushed to prevent reoccurence!

    The machine is very reliable, and consistent. I've replaced the group seals a couple of times. And attended to a sticking o-ring on the vacuum break valve a couple of times. Both very quick, cheap and easy fixes.

    Without intentionally doing so, we have cut back on coffee and alcohol use. Don't know why.

    So now it's switched on in the morning for a breakfast latte for me and Mrs Robusto....and mid-morning double shot espresso for me.
    It's then switched off until night for a single espresso for me, and latte for her.

    At Christmas and other family gathreings it is a godsend. I take orders for up to 20 espressos and lattes, and with the two groups I can made 4 shots at a time, flush, reload and extract with no waiting. The 5 litre boiler never goes cold or loses pressure.

    Steaming milk....we make a great team, and I must say, perfect microfoam has been second-nature for years. I look back at my first attempts with its predecessor, a Rancilo Silvia. Where do I hold the pitcher? At what angle to the wand? Tilt to the left or right, front or back? Do I move it or keep it stil?......It was a mystery whose secrets I feared would never be unlocked.

    But they were unlocked, and it's a pleasure to deliver my wife and guests microfoam which knocks their socks off.

    I should really descale it, perhaps think about a new diaphragm for the mighty Sirai pressurestat which never misses a beat. Perhaps even clean the contactors contacts. But if it aint broke, why bother trying to fix it?

    On the worry side, Grinders in Fairfield no longer stock parts. Something which may be more than a worry down the track when and if I need them.

    Looking back over this thread last night I saw recalled how JavaB and Sparky guided me during its set up. I remain indebted to them.
    matth3wh likes this.

  25. #275
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    Nice to hear, I read over this today. I'm sure it's got a lot more life in it.

    What's the next upgrade?

  26. #276
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    Wink

    Quote Originally Posted by RecR View Post
    Nice to hear, I read over this today. I'm sure it's got a lot more life in it.

    What's the next upgrade?
    Next upgrade? Do they have coffee machines in heaven?

  27. #277
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    Talking

    Good to see another happy Grimac user, I've got a Grimac twenty semi auto single group and loving it also the wife doe's to.

  28. #278
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    I've got one I wanna refurb also ☺️

  29. #279
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    I've just been given two group Grimac espresso machine. While I'm fascinated with espresso machines and want to learn more about them, I don't have a clue. I'm picking it up In the morning.
    The lady that's giving it to me says it's not reliable. Who knows what's wrong with the thing. I guess free means I can't go wrong, right? I'll post pictures of the actual machine tomorrow. While I'm handy it's probably way over my head to try to refurbish the machine. Would love to have some feedback. Thank you

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