Accidentally forgot to make a mark on my grinder before taking it appart, and I cant find any mark from the jura engineers. Now the pucks are coarse and loose so I would like to calibrate my grinder. Does anyone know how to?
SOURCE: grinds coffee too coarse
Hi Sounds like you have a broken grind adjustment ring. You should contact Baratza and see if you can get a replacement. 877-701-2021 8:00am to 5:00 PST Monday thru Friday.
SOURCE: How to calibrate my Bunn grinder.
It would be easier to pick up the manual in the commercial section under products from bunn.com, rather than me explaining it.
You have to loosen the nut on the adjustment wheel, then pull out slightly and turn towards coarse a few numbers, then push back in and turn grinder on and slowly turn toward fine, until the burrs slightly touch, you will hear a little metal on metal, at that point turn the grinder off, back off about slightly, then pull out adjuster and turn it to Turkish and tighten screw.
Testimonial: "Thank you very much for your help. I did it. Yeah..I lost the manual book. I was looking for the nut to adjust. I just found it. Thank you."
SOURCE: Does anyone know how to take apart Jura Impressa
I hope this Jura F90 dismantling guide may offer some clues for your E-series machine. Before you start remind yourself of the risks. In case of a mess up, below I've listed a firm selling spares in Europe. In the UK it is assumed that it you can afford the BMW of coffee machines, you can afford to fix and service it too. However I haven't tried any of the servicing firms so they, and yours could be really, really helpful and cheap. You will need about 4 different torx; hexagonal and possibly unique screwdriver bits to remove all screws. A plastic pry tool (used for mobile phones) will help where plastic lugs hold on the side and top panel. Empty beans; water store and remove the waste tray. On the Jura F90 use pliers to undo two oval headed screws at the back at the top. You'll be able to remove the top panel after using a pry tool to disconnect two lugs at the front edge. You don't want to dismantle the coffee grinder and its hopper. Retain the hopper's rubber seals or glue them in place before you lose them as I did. Four screws hold the central back panel. Slide out a white key underneath the machine (can't recall how crucial this was). The side panels are removed by using a pry tool to release lugs all down the edge where these panels meet the front. Work slowly to manoeuvre the side panels off. If you simply want to clean the brewing unit externally then just remove the panel on the water side. Find the water inlet just where the water tank sits. A screw here allows you to remove a plastic piece - but take a photo of how it slots in. This gives access to the lower end of the brewing unit. If the plastic piece is still it the way, you can ease off the water pipe from the water inlet and put it aside. A number of different brands are made by one firm and branded. Thus the guts of these machines are similar. The brewing unit in the Jura F90 is almost identical in many machines. The screws and attachment places are different. The water inlet and valve are different. Cleaning the parts you can now see may fix a Malfunction 8 without removing and dismantling the brewing unit. The machine is partly operable in this state - cover the exposed electrical connections and remind yourself of the danger here. Thus you can switch off the power when the brewing unit's white wheel is at the top and then at the bottom. In this way you will get access to places causing any jam. You might just need to clear the inner chamber and path for two plungers with two large O-rings. You can see the water inlet nozzle with its o-ring which can perish and cause coffee or water to go to waste. Silicone grease only where the O-rings slide. Leave the other plastic parts ungreased. As I said you might get away with not disassembling the brewing unit. You can however buy a maintenance kit or a new brewing unit from the shop below. You will want to avoid removing the nylon water pipes - unless they're actually leaking. These pipes are held in place with a wire clip (remove with a flat head screwdriver). Ease the nylon pipe with its brass collar out of its socket. The pipe goes into an O-ring in the pipe's socket - this might fall out. Removing a brewing unit is like removing a car engine. The link at the shop below has a pdf (Anleitung_Jura_E.pdf) There is no need to force anything. On the Jura F90 the brewing unit is removed by undoing two obscure screws from the coffee grinder side. I had difficulty removing these and I wish I had taken time to find the right tool instead of wearing down the screwhead. On the electronic side there's an optosensor (encoder) unit held in place with a steel clip. You might remove this to access one of the two screws. At the bottom of the brewing unit, the water inlet valve is fixed to the machine with a single screw. Next, on the water tank side, you'll see two lines of screws that hold the assembly in place. The middle screws of the screws allow you to separate the unit from the gears. The top two holes don't have screws. Coffee machine spare part supplies are not as common in the UK as they are in mainland Europe. You'll find this web useful because of the pictures: www.kaffeemaschinendoctor.de is a German web shop for machine spares AND there's a pictorial of how to dismantle the Jura F90 as a pdf. Google will almost translate it). Juradoctor.de also carry lots of spares but don't seem to ship to my country.
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