$29.95 Buy It Now or Best Offer
free,30-Day Returns

Seller Store juracapressodoctor
(4760) 100.0%,

Location: Wilmington, North Carolina
Ships to: US,
Item: 115231316738

Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
Compatible Brand:Jura
Jura:Jura
Type:Brew Group
MPN:BIGKITMICRO

This listing is for a set of O-rings for the Eugster Frismag brew group used in most Jura coffee machines.The grease included in this kit is NSF/ANSI 51/61 certified and safe for use in food processing and in your coffee maker. Beware of equivalent kits using grease of unknown certification, origin, or freshness as it may not comply with United States food safety laws. The grease comes from a fresh batch with documented origin. Manufacturing Lot# H053M2H005 with a shelf life of 22-JAN-2027. Watch out for products of unknown origin or stale products – the grease in your brew group comes in direct contact with the coffee you’re drinking.The set contains:One O-ring for upper piston (can be replaced without dismantling the brew group)One O-ring for lower piston (brew group needs to be dismantled to replace this)One O-ring for the lower piston water inlet pipe on the drainage valve assembly (this is the small black O-ring packaged with the two lip seals)Three lip seals for the drainage valve (located on the bottom of the brew group) One O-ring for the drainage valve arm (found on the newer models of the brew group)One O-ring for the vacuum docking nozzle (found on the new PEP models)Two 4mm O-rings.Two O-rings for the raiser tube (located inside the upper piston).Two stainless steel E-clips for the steel rod on the bottom of the brew group (the original clips easily break when removed)Water tank lip seal. As of October 3, 2024 the kit contains a BLUE (premium) seal.One 6 gram bag of NSF 51/61 food grade silicon grease for lubricating the pistons and cylinderOval head tool (stainless steel)You may notice that the kit does not include the aluminum cap for the drainage valve rod. The reason is because we do not recommend replacing the original white cap. Instead, you should do the following permanent and reliable fix: Simply add a drop of 5-minute Epoxy glue in the two slots on the original white cap. Twist the cap to let the Epoxy get everywhere inside the cap. Let dry. This repair guarantees that the cap won’t ever come off. To our knowledge the O-rings will work for these machines. Please note that this list is not complete:Jura: A1, A5, A7, A9, ENA 8, ENA Micro 1, ENA Micro 5, ENA Micro 8, ENA Micro 9, ENA Micro 90, ENA Micro EasyNOTE: This kit is ONLY for the Jura ENA8, Jura ENA MICRO series, and for the A-series that use smaller piston O-rings. This kit is NOT the correct one for the rest of the Jura series, but it is the right one for the ENA 8, ENA Micro, and A-series. The product that works for other models can be found hereThe O-rings ship with a 6g portion back of DOW 111 NSF51/61 food processing approved grease. (DOW 111 is the exact same compound as the OKS 1110 used in Europe when servicing Jura machines). The grease is used for lubricating the O-rings and the cylinder walls. By keeping the cylinder lubricated (relubricating every 6-12 months), these O-rings should last you up to 10 years or more. (The O-rings go bad when the lubricant wears off and they are run dry). The 6-gram pack of lubricant will last you a long time. To replace O-rings in brew group:Snap off the top cover (near the white gear) by gently prying it off in the corners.Snap off the left and right cover. Each cover is attached with 4 tabs (note that one of the tabs is hidden).Remove the two control arms and pay attention to the two metal bearings that will fall off. (Don’t lose them!) Unscrew the white gear and note what side goes upwards for reinstallation (for instance use a black marker and put a dot on the side that faces upward).Now the upper piston can be removed. Make a note of the orientation for reinstallation (it can be rotated 180 degrees and it may not be obvious what way it goes unless you make a note of it).Change the O-ring on the upper piston. Remember to apply grease to the O-ring.Optional: Unscrew the screw that holds the metal filter mesh in place and clean it. If the mesh is visibly dented or damaged you should consider replacing it since a dented filter may affect the ability to achieve a good crema. Filter can be purchased here: https://www.ebay.com/itm/122910552946Pull out the valve assembly (it slides out toward the bottom of the brew group) and replace the O-ring on the water inlet pipe. Note that it’s the thinner of the two O-rings in the set that goes here. Again, remember to apply grease to the O-ring.Remove the two 7mm locking rings on the bottom of the group and slide out the metal rod. Swing the bottom assembly with the gears to the side. Again, watch for two more bearings that will fall out!Press the bottom and top part of the assembly together all the way to release the lower piston.If you decide to remove the lower gear assembly for cleaning, pay attention to the orientation! It’s easy to accidentally put it in the wrong way resulting in a non-working brew group. (If all coffee goes in the tray, this is probably what you’ve done wrong)Replace O-ring, clean everything, apply fresh silicon grease to the O-ring and to the cylinder walls.When reinserting the lower piston, make sure to press the gear assembly and the cylinder assembly (the brown parts) firmly together, then insert lower piston with a firm press engaging it into the gears.Insert the steel rod (don’t install the two locking washers yet). Install the two inner bearings.Test the track movement and make sure the piston does not jam against the black plastic. If this happens, the piston was not properly installed, Go back and redo these steps.Install locking washers.Slide valve assembly into place.Slide upper piston into place (make sure it’s inserted in the correct orientation)Screw on the white gear making sure to get the correct side upwardsInstall outer bearing on one side, put control arm in place (rotate white gear to line things up), snap cover on. Do the same on the other side.Snap on top cover. Test function (see note below). DONE! IMPORTANT: Do not apply grease to the tracks where the four metal bearings run. These tracks must be clean and free of lubricant. This is important because the tracks are equipped with one-way feather stops, and if you grease the tracks the grease may cause the bearings to jump the stops and the brew group will malfunction. Grease should ONLY be applied to all O-rings and to the inside of the lower cylinder. Do NOT apply grease to any other parts. The plastic (Delrin) is self-lubricant. Applying grease to the mechanism will not do any good and results in coffee grounds and dirt getting stuck and eventually results in things gumming up. BROKEN GEAR: A common problem with these brew groups is that the lower piston gear shaft comes loose. DO NOT GLUE IT! The material is Delrin (POM). Glue won’t stick well and ruins the brew group by preventing proper future repair. The parts need to be chemically welded using Hexafluoracetonesesquihydrate or alternatively molten together (using an SMD hot air pencil works great). Contact seller if you have a broken gear that needs repair. When testing the brewing group movement, ALWAYS turn the white gear fully in one direction until it stops and then turn it all the way in the other direction until it stops. Never change direction midway! Before installation, turn the gear counterclockwise all the way. Then clockwise until the brew group is in “coffee loading mode”. (The cylinder is underneath the hole in the frame with the plunger in the bottom position, ready to be filled with coffee).Shipping: In most cases your item will be shipped the same day if payment is received by noon eastern time (12 PM EST, 16:00 GMT Monday-Saturday). Items paid after this cutoff time may be shipped the next business day. International customers: Please note that the default shipping is by First Class Mail. The US Postal Service does not guarantee timely delivery for this mail class, and although most shipments arrive within 7~14 days, on some occasions it has taken up to 30 days for international First Class Mail shipments to reach their destination. If you’re in a hurry, please choose Priority Mail shipping!

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