Question about Nuova Simonelli Mac 2000 I Group Espresso & Coffee Maker

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Adjust group water pressure

When the brew switch is activated, the water pressure is excessive, and outputs 10oz in the same time the other group outputs 1oz. (left group is OK, the right one has the problem) The water pressure on the group with the problem had once been turned up by someone, and I didn't observe the adjustment. Since then someone descaled it with a little acid, and now it is pumping way to much water compared to the good group. There is what looks to be a 10mm nut on both, and the one with good pressure has no threads showing; the one with excessive output has a little more than one thread showing. The hex nut is located at the back of the group, and looks to be a logical point to regulate the flow. I do not have a service manual to confirm.

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No. the amount of water to brew your coffee depends on the flowmeter. there is an orifice that regulates or measure the water flow. if you want to check this, you need to remove the output nut and clean this orifice and compare it to the other group. on the other hand, the one behind the group is just a provision for other things and not necessarily with any connection to the problem. if your group has scale build up. need to open it to remove and clean the scales.
adjust group water pressure - part_p_1520115_2891509691-kbrkc4gb0zehpcnqzz05bd12-5-0.gif

Posted on Dec 18, 2017


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Posted on Jan 02, 2017

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SOURCE: Pump keeps running and excess water goes into the cup tray

check the level probe on side of boiler may not be facing down as it should or need to be replaced.

Posted on Jan 04, 2009

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SOURCE: Lower gauge that monitoring pump always shows 4 no

The gauge is connected with pump water output with a very thin pipe called cappilary pipe. So if any dirt that is comming from the water supply can blocked this cappilary pipe and if this happens during the pressuring phase then blocked a pressure of 4 bar inside the gauge. So if you desconect the cappilary pipe behind the gause the you should see if any water comes out from cappilary pipe. If not you can remove it also from the side of the water pump and try to clean it by blowing air from the side connected to gauge this can clean it perfectly. The you can conect it back together. The you will read normaly the pressure of the water mains and during making easpresso pressure of about 9 bars. If you dont have any change in the gauge after performing above the gauge might be the problem.

Posted on May 02, 2010

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SOURCE: i have a 3 group 2002 premier maxi. the laft and

The metering jet filter on top of the heads are blocked or the solenoid coil is damaged.

Posted on Jul 02, 2010

  • 26 Answers

SOURCE: the water flows very slow on group 1. On the other

There could be a couple of reasons for this. The simplest could just be that you need a new group (brew) solenoid valve, yours might not being opening fully. You could also have a clog some where. Take the shower head out and soak it in PuroCafe over night. If that doesn't fix it you would have to start checking the jets in the head and or the tubing that supplies water from the heat exchanger to the groups.

Posted on Nov 02, 2010

  • 1618 Answers

SOURCE: One of the group heads

It sounds like the metering jet on the top of the group is blocked.

Posted on Aug 15, 2011

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a.) Group get of is place when it is not clear and and there is big pressure.
b.) Behind the group there is a switch that stops group motor when group reach the end.When that switch (micro switch) is not working correct the motor doesn't stop at the end and the pressure pulls it out.

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there is excess water that comes from the injector when the brew group disinguages it. make sure the path is clear of coffee grounds in such. Some other things to check are the conditions of thr o-rings there are to 2 on thr injector inside the machine and one on the brew group if there damaged at all they will leak.

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After getting Replace Water Filter VEntilate display I replaced with Saeco Intenza water filter cartridge I have always used. However, unit does not move off this display after I press OK button. I have...

After replacing the filter in the tank, keep the button pressed; when the indicator light is flashing, then release the button.

Also at times, the gears in the brew drive assembly will not complete the cycle to the proper start position for different reasons. Some of the reasons are:

  1. Brew group jammed or blocked.
    Note: A jammed or blocked brew group can happen when the brew group starts the cycle but doesn’t finish it.
  2. Either one of the micro-switches in the brew drive has gone bad.
  3. Brew drive motor failure.
  4. Broken teeth on either of the brew drive gears.
  5. Dirty brew group, covered by coffee grinds.
  6. Brew group or gears not lubricated.
  7. Connections to the board from brew drive assy., or motor have gone bad

Oct 08, 2009 | Saeco Incanto Classic Espresso Machine

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Have you tried to clean the shower in the brew group, then adjust the grinds about 2 numbers coarser and test?

Aug 04, 2009 | Coffee Makers & Espresso Machines

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Remove the shower screen and press button to brew, if water flows the the holes in the screw/diffuser is blocked, if water does not flow then the blockage is at the solenoid or within the group head chamber. This problem I have notice when someone brewed without the shower and screw in place.

Jun 29, 2009 | La Marzocco Linea Series Group 3 Espresso...

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After a cleaning of the group, we're not able to put it back

First step: You need to make the machine think that the group is in place.
Solution: This can be done by locating the three microswitches that need to be set. Turn machine on/Open the door/insert wastetray&dredgebox (switch One)/with plastic stir stix(noconductive material) active brewer microswitch located in the centre of the back wall/with plastic stir stix(noconductive material) active door microswitch located top right side behind door. All 3 switches need to be actived simutainiously with the power one. When installing the brewer, be sure that the microswitch activator slide on the back of the brew group itself is in the up position.
Note: if you do not know what I was talking about(microswitches) best not to attempt

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Odea giro plus gear that drives the brew group has broken 3 times

First, you're going to need to get the brew group out. Check this out to get the brew group out. You need to remove a screw and pull unless you're really crafty.

This video will help.
After that:

a) Yes, lubing will help.
b) Replace the o-ring on the piston in the brew group (it should be orange). It gets old and gummy creating resistance.
c) Reinforce the weak plastic that gets over-torqued.

I own three of these units, one from 2007 (made in Italy, never broke, has tens of thousands of brews) and two newer units (made in Eastern Europe, fewer brews, both broke). I can distinguish the newer ones because they have a "sleep mode". They really overtorque the gear.

I tried repairing with just glue and that lasted (surprisingly) several months. I tried again by using a thick paperclip as a drill bit and that lasted 7 months.

Now with the holes piloted, I drilled a little wider and put in heavier metal from a heavy-duty binder clip. Cheap and very strong! Let's see how long this lasts.

See before and after pictures. This metal won't bend!

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1 Answer

Gear that drives the brew group has broke for the third time odea giro

Usually gears breaking is a sign that your grinding the coffee too fine. Other possible reasons for breaking gears are a malfunction with the brew group itself. Unlubed and uncleaned brew groups are notorious for breaking the gears as well.

I recommend soaking the brew group in hot water and cafiza for a while, rinsing, and then lubing the inner chamber, side screw nut, and lower piston.

After that i recommend adjusting grinder settings lower to not place as much stress on the machine.

Most people do not understand that these home super automatic machines were never made to make authentic espresso, but an approximate of it.

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Gaggia Synchrony Brew Unit Block

You have got the gears out of alignment. You don't really want to take out brew group unless at end of cycle. You can fool machine to get brew group back in.
Here is how :

If you ever find yourself in need of removing a Brew Group that has jammed. This will assist you in doing so correctly.

To fix this problem follow these simple steps:
You will need a #1 Philips screwdriver

1.) First, open the door on the machine and remove the drip tray and dredge drawer

2.) Locate the nickel size hole in the brew group. It will have an "N" next to it. At the 9 o'clock position, you will see another hole about 1/3 of the size of the first. Directly behind this hole, or about an inch up depending on the position the machine was stopped in you will see a single philips head screw. You may have to look around the side of the brew group to locate the screw as it is not always visible from the smaller hole. Remove this screw; it holds a small coupling water inlet (it is similar looking to a tobacco pipe) to the brew group.

3.) Remove the brew group by pressing/pushing (depending on your machine) on the part that says “Press" or "Push”. Pull firmly and straight out. Be cautious to not break the brew unit. Also be aware of the door of your machine as it can break as well.

4.) With the brew group out, remove the small coupling water inlet (tobacco pipe) that is probably still stuck to your machine and reinstall it in the brew group as it was before. Make sure the screw is installed snugly but not too tight.

5.) Turn the brew group around so you are facing the back. Now imagine what a check mark looks like, the top we will call position A (longer part of the checkmark) and where the checkmark ends (the smaller portion) is point B. You will notice what looks like a large checkmark where the coupling water inlet is located. The water coupling can slide up and down in this checkmark opening. The water coupling should be in the B position.

To do this, the gears will have to be reset to the start position. In order to do so, you will have to bypass the three micro-switches (Brew Group, Dump Box and the Door switch).
Bypassing the micro switches:

1.) Looking at the back-side of the brew group, not the side that says "Push" or "Press," you will notice something fin-like or nose shaped. This piece fits into a keyhole or coin slot looking slot in the machine and that is where the brew unit micro-switch is located. Take something like an index card, envelope, or folded up piece of paper, and insert it into that keyhole so that it will trick the machine into thinking that the brew unit is installed. Start the piece of paper at the top of the slot and slide it to the bottom of the slot. The paper should be thick enough so you can let go and it will remain in place. Leave this object in there until the following steps are complete.

2.) WITHOUT putting the brew group back into the machine, reinstall the drip-tray and dredge drawer and close the door.

3.) After doing so you can then turn the machine ON. At this time the gears will begin moving until they return to the correct start position. At this point remove the object from the keyhole position and you can now reinstall the brew group. If the brew group does not go back in correctly, try a few more times. The machine will return to its home position. Note: The two large spokes of The brew drive shaft should in the Up position

At times, the gears in the brew drive assembly will not complete the cycle to the proper
start position for different reasons. Some of the reasons are:
• Brew group jammed or blocked
• Either one of the micro switches in the brew drive have gone bad.
• Brew drive motor Failure.
• Broken teeth on either of the brew drive gears.
• Dirty brew group, covered by coffee grinds.
• Brew group or gears not lubricated.
• Connections to the board from brew drive assy., or motor have gone bad.
A jammed or blocked brew group happens when the brew group starts the cycle but doesn’t finish it.

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