Turn off machine, unplug its power cord (it's a good habit), and allow the machine to cool to room temperature.If you have been going chemical backflushes regularly this may not be necessary. This can be used to clean parts as they are disassembled. Mix some espresso machine cleaner (backflush detergent) in hot water in a large measuring cup and set it off to the side.Nitrile gloves (recommended to keep lube off your skin).Paper towels to wipe lube off your hands.Electrical tape (handy to put on the jaws of tools to protect chrome).One to dry and clean parts, and another one to place on the counter top to hold parts. Dow 111 or equivalent food-safe lubricant suitable for water exposure and high temperatures.Espresso machine Cleaner (TSP or equivalent).A source for replacement valves (see step 19 for details).Possibly other seals for the body assembly as needed.It is a good idea to have some spare parts on hand to eliminate down time. Socket or nut driver for removal of the Gicleur (if necessary).A 5mm hex key (for groups with socket-head bolts).For example, my Craftsman 12" adjustable wrench is too small to fit the infusion housing. For that reason I will not be discussing what size wrench you need. NOTE: the large nuts and other fittings on the groups have different sizes depending on the manufacturer. Most E-61 groups can be completely disassembled some simple tools: If the machine is about due for that task, schedule it ahead of time as well, although it certainly does not have to be done the night before. Much the same can be said for a descaling. You don't want to do a chemical backflush after an overhaul because it will wash away the lubricant and cause wear to internal parts of the group. This will help clean up some of the parts, and will also clean the exhaust portion of the brew path. The day before disassembling the group, and before shutting down, do a chemical backflush. This article will guide you though that complete disassembly and cleaning. If the group has been in service for a while (say, more than one year), or seen heavy use, it is a good idea to check the valve seals, and while it is apart, give everything a thorough cleaning. If your group may just need a quick lubrication of the cam, check out the sister article I wrote, Simple Lubrication of the E-61. I suggest getting a parts breakdown for your group before beginning to disassemble your machine, and compare the parts as shown on your diagram to what you read here. On the other hand, for the manual group, internally the general layout is the same regardless of the brand. If your has an electrical activation for brewing then there will be differences which you will have to investigate before beginning. I am showing the manual (lever) group from the Vibiemme Domobar line. I am going to detail the steps it takes to overhaul an E-61 group.īe aware that there are some difference between manufacturers when it comes to this group so yours may not look exactly like this one. It is simple to work on and it makes great espresso for a lot of reasons. The E-61 group has been around for over fifty years and for good reason. Overhauling and Lubricating the E-61 Group
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