{"product_id":"rocket-zylinder-keramik-bruehgruppe-reparatur-kit","title":"Rocket Ceramic Cylinder for the Brew Group – Repair Kit, R299906767","description":"\u003cdiv class=\"ccc-mobile-wrapper\"\u003e\n\u003cstyle\u003e.ccc-mobile-wrapper{max-width:880px;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#1d1d1f;line-height:1.65;font-size:17px}.ccc-mobile-wrapper h2{font-size:1.7em;line-height:1.25;margin:0 0 .6em;font-weight:700}.ccc-mobile-wrapper h3{font-size:1.3em;line-height:1.3;margin:1.8em 0 .5em;font-weight:700}.ccc-mobile-wrapper h4{font-size:1.05em;margin:1.1em 0 .2em}.ccc-mobile-wrapper p{margin:0 0 1em}.ccc-mobile-wrapper a{color:#0b6b5f;text-decoration:underline}.ccc-compare-table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.97em}.ccc-compare-table th,.ccc-compare-table td{text-align:left;padding:10px 12px;border-bottom:1px solid #e3e3e6;vertical-align:top}.ccc-compare-table th{width:42%;font-weight:600;color:#3a3a3c}.ccc-roastery-tip{background:#eff6f4;border-left:4px solid #0b6b5f;border-radius:10px;padding:16px 18px;margin:1.6em 0}.ccc-return-note{background:#fdf3ef;border-left:4px solid #b4532a;border-radius:10px;padding:16px 18px;margin:1.6em 0}.ccc-faq h4{font-weight:700;margin:1.2em 0 .2em}@media(max-width:600px){.ccc-mobile-wrapper{font-size:16px}.ccc-mobile-wrapper h2{font-size:1.45em}.ccc-mobile-wrapper h3{font-size:1.18em}}\u003c\/style\u003e\n\u003ch2\u003eThe hard heart of the brew group, for when your shots become unsettled\u003c\/h2\u003e\n\u003cp\u003eInside the brew group, a piston runs in a cylinder, and this cylinder is made of ceramic. Ceramic is used because it is very hard, very smooth and completely indifferent to hot water – exactly what you need in a place where something constantly slides back and forth at almost a hundred degrees. This repair kit has the part number R299906767.\u003c\/p\u003e\n\u003cp\u003eWear shows up in the shot, not in the part. The lever runs rough or unevenly, the pressure no longer holds steadily, the shot collapses, or water leaks out somewhere it never did before. Open the group at that point and you will find a cylinder with scoring or a dull, roughened running surface. Resealing no longer helps in this state – the new seal wears in on the rough surface straight away.\u003c\/p\u003e\n\u003ch3\u003eWhen it's due\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour shots have become unsettled and the pressure fluctuates.\u003c\/li\u003e\n\u003cli\u003eThe lever or piston runs rough, sticky or unevenly.\u003c\/li\u003e\n\u003cli\u003eWater escapes from the group even though the seals are new.\u003c\/li\u003e\n\u003cli\u003eThe seals only last a short time before they wear in again.\u003c\/li\u003e\n\u003cli\u003eThe cylinder shows visible scoring, limescale crusts or a dull running surface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003ctable class=\"ccc-compare-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eCeramic cylinder, repair kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLocation\u003c\/th\u003e\n\u003ctd\u003eInside the brew group\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eRocket espresso machines – the documentation does not name a specific model series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eScope of delivery\u003c\/th\u003e\n\u003ctd\u003eThe scope follows the manufacturer's specification for number R299906767. The complete brew group is not included.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003ctd\u003eR299906767\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVersion\u003c\/th\u003e\n\u003ctd\u003eAs a repair kit. Dimensions are not given in the documentation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003eFitting by a professional is recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRocket Espresso\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWho it's for\u003c\/h3\u003e\n\u003cp\u003eFor workshops and experienced home mechanics who overhaul a brew group rather than replacing it entirely. If you only need a new seal, this isn't the right part; but if you're resealing for the second time and it still won't hold, this is usually exactly your problem.\u003c\/p\u003e\n\u003ch3\u003eImportant for installation\u003c\/h3\u003e\n\u003cp\u003eThe cylinder sits inside the brew group, in a pressurised and very hot area. Before any work, the machine must be switched off, unplugged, completely cooled down and depressurised. We deliberately don't give step-by-step instructions here – dismantling a brew group takes experience and the right tools. Ceramic is hard but brittle: it can't take a knock or being used for leverage.\u003c\/p\u003e\n\u003ch3\u003eWhat goes with it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/en\/products\/rocket-zylinder-keramik-bruehgruppe-komplett\"\u003eComplete ceramic cylinder including metal screw, RA99905814\u003c\/a\u003e – the other version, different number, different scope of delivery.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-nockenwelle-bruehgruppe\"\u003eCamshaft for the brew group, C219900425\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-flanschdichtung-bruehgruppe\"\u003eFlange gasket for the brew group, C449900767\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en\/products\/rocket-feinfilter-bruehgruppe-r619905546\"\u003eFine filter for the brew group\u003c\/a\u003e and \u003ca href=\"\/en\/collections\/serviceteile\"\u003eall spare parts\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"ccc-roastery-tip\"\u003e\u003cp\u003e\u003cstrong\u003eFrom our workshop in Bern and Zürich\u003c\/strong\u003e\u003cbr\u003eWe run a fingernail across the running surface before we decide. If it catches, the cylinder is due; if everything feels smooth, a seal kit is enough. This one simple check has already saved us many unnecessary orders. That's our routine, not a manufacturer requirement. Once the group is back together, we pull three espressos in a row as a final check – ideally with \u003ca href=\"\/en\/products\/nutty-delight-kaffee-blend-brasilien-indien\"\u003eNutty Delight\u003c\/a\u003e or \u003ca href=\"\/en\/products\/cozy-chocolate-natural-brasilien-kaffeebohnen\"\u003eCozy Chocolate\u003c\/a\u003e, or something stronger with \u003ca href=\"\/en\/products\/very-nutty-kraftiger-robusta-aus-indien\"\u003eVery Nutty\u003c\/a\u003e. More under \u003ca href=\"\/en\/collections\/kaffeebohnen\"\u003ecoffee beans\u003c\/a\u003e.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"ccc-return-note\"\u003e\u003cp\u003e\u003cstrong\u003eReturns excluded\u003c\/strong\u003e\u003cbr\u003eSpare parts are excluded from exchange and return. They are sourced specifically for each order and cannot be resold once they have been fitted or test-fitted on a machine. So before ordering, check the model, year of manufacture and serial number of your machine – or drop us a quick message and we'll clarify the fit together. Your rights in the case of defective goods remain unaffected.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"ccc-faq\"\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat is the difference from number RA99905814?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThey are two different items with clearly different numbers. This one is listed as a repair kit, the other as a complete ceramic cylinder including metal screw. The exploded view tells you which one belongs to your machine – or we do, if you send us the serial number.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat exactly is included?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe scope follows the manufacturer's specification for number R299906767. The documentation doesn't break it down, and we won't claim anything. What is definitely not included is the complete brew group.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eIs this an electrical part?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eNo. The ceramic cylinder is a purely mechanical component in the brew group with no electrical function whatsoever.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eIsn't a new seal kit enough?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eIf the running surface is still smooth, yes. If the cylinder is scored or dull, every new seal will wear in again straight away – then the cylinder is the right way to go.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCan I look at the part in your showroom?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes, gladly. You'll find us in Bern at Gerberngasse 44 and in Zürich at Hagenholzstrasse 50b. Bring the serial number or the old part with you.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eQuestions about the fit? Write to us at \u003ca href=\"mailto:office@coffeecoachingclub.ch\"\u003eoffice@coffeecoachingclub.ch\u003c\/a\u003e. We deliver across Switzerland and to Liechtenstein in 2-4 working days.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the difference from number RA99905814?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They are two different items. This one is listed as a repair kit, the other as a complete ceramic cylinder including metal screw.\"}},{\"@type\":\"Question\",\"name\":\"What exactly is included?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The scope follows the manufacturer's specification for number R299906767. The complete brew group is not included.\"}},{\"@type\":\"Question\",\"name\":\"Is this an electrical part?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The ceramic cylinder is a purely mechanical component in the brew group.\"}},{\"@type\":\"Question\",\"name\":\"Isn't a new seal kit enough?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"If the running surface is still smooth, yes. If the cylinder is scored, every new seal will wear in again straight away.\"}},{\"@type\":\"Question\",\"name\":\"Can I look at the part in the showroom?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. We are in Bern at Gerberngasse 44 and in Zürich at Hagenholzstrasse 50b.\"}}]}\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Rocket","offers":[{"title":"Default Title","offer_id":56310658498945,"sku":"A02763","price":73.15,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/2265\/2931\/files\/A02763_1.jpg?v=1790158674","url":"https:\/\/coffeecoachingclub.ch\/en\/products\/rocket-zylinder-keramik-bruehgruppe-reparatur-kit","provider":"Coffee Coaching Club GmbH","version":"1.0","type":"link"}