Do-it-yourself delonghi kg 79 coffee grinder repair

In detail: do-it-yourself repair of the delonghi kg 79 coffee grinder from a real master for the site my.housecope.com.

Thank you Sergey!
Finally, now I can find the right grind for espresso!

Thank you very much, Sergey! It helped a lot :-)

Thanks, I did the same.

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Thanks a lot for the article. Very much helped out with grinding.

Thank you very much ha instruction.

remove the upper millstone, disassemble it and put a washer between it and its holder. Set the grind coarser and gradually adjust. No food with disassembling the grinder, the result is about the same

washers used usual for bolts d4, thickness 0.3-0.5 mm, sold in any store for fasteners. After these manipulations, the grind regulator is already going tight to the very minimum, so I set it to about 40%. Grinder namomoloa very little coffee, grind very fine. Set the grind regulator to maximum. The amount of coffee has increased, but the grinding is still very fine compared to what was before.

I used d3 washers, I did not measure the thickness, visually 0.2-0.3 mm, the grinding regulator goes to the very minimum, and not tight. If grind for min, a pressure of 15 bar pushes the water
with difficulties. Well regulated. I'm happy with the result. Thanks!

Thanks more for the article. It helped a lot. Was going to change the coffee grinder

Thank you very much, all hands did not reach. Disassembly and adjustment for a maximum of 10 minutes. As many as 9 clicks until the millstones touch, left 8 clicks, grinding to dust.

Man, thank you very much! I thought that I would have to carry it to repairs because of grinding. But I did everything thanks to your article.

Huge human THANKS.

Thanks for the description! I don’t understand how I managed to turn the gears, but I began to grind very coarsely. Now everything is OK!

Video (click to play).

By the way, the following problem that could be with it:
... protection began to work from some kind of fright. For three years it worked flawlessly, except that the indicator light stopped burning during grinding after about a year, and flashed for a split second and went out, but the quality of work did not affect. And now the grind turns on for a couple of seconds, then the coffee grinder turns off. So you stand and press your finger every two seconds, grinds, of course, but delivers specifically.
and the solution:
... replaced the encoder 47k275v-x2 (large yellow on the board), works without questions.

I hope it helps someone, but I already sold mine along with the coffee maker. I bought a coffee machine.

Thanks for the advice with the Conder, I didn't have to look for a malfunction, the symptoms were the same - I immediately got up after pressing the button, I had to poke continuously.
well, at the same time, I adjusted the grinding to a minimum, as described in the article

The same problem, I will look for a Conder and change it.

Many thanks! It is painted in great detail, and most importantly - photos on the same resource. They do not disappear after six months, as in other places.

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Thanks! It also turned out 4 clicks, millstones were already clinging to the fifth. But, another jamb got out. At the finest grind, now, it starts to idle. Those. feeling that the grains no longer fall on the millstones. You have to take the grinder during grinding and swing it left and right or shake it, then it grinds normally ..

Good day! I just can't remove the coffee amount regulator. Are there any tricks? I'm afraid to ruin the appearance with a screwdriver, I put plastic cards, but no click happened.

Are you talking about this lid that is connected to the gear? If so, take a look at the paws in the photo. Just push hard and pull out. With your fingers. =)

The regulator is the one that was removed from the end with just the paws. And the one with the number of porridge in front, I just can't take it off. In the photo, it is not entirely clear how it is attached.Pry off with a screwdriver? I'm afraid there will be dents.

Hang up, it worked. Thanks! I will continue.

With a screwdriver or hard plastic, gradually in a circle

Sergey, many thanks to you!
Grinding is now what you need. I was really thinking about replacing the grinder.

Initially, I wanted to buy a millstone coffee grinder for flour and cereals - but it didn't work, this coffee grinder began to be capricious and did not work when I put the beans. The millstone came off. Later, I put on the millstone properly - it must be closed, turned towards the lock.

The upper millstone must be turned and closed when you put it on. Then I had a problem that he flew off during work, the grind turned out to be coarser - apparently, I closed it badly, that means.

The grinding came out quite coarse, larger than in the video about this coffee grinder, which I watched! And I realized that even for such a coffee grinder this is not the limit, and I saw that something needed to be done! With a Phillips screwdriver, I tightened the upper nails, the upper millstone bolts, so that they sat deeper and did not "look out". They were a little too loose. These are claims to the assembly, to the manufacturer! It's good that you can do something about it.

As you can see, the millstones are made of PLASTIC. Hard and strong, since he grinds coffee. Screwed in with iron.

The black plastic at the top smells like plastic - but it doesn't taste the coffee in any way.

And here is a photo of the grinding. This is the finest grind that I got after I twisted the cloves, at the smallest mark on the handle adjuster. Perhaps, in some photos, autofocus shows very large. The grinding is not very uniform - there are very small particles, and it is like granulated sugar.

DISADVANTAGES: Again, despite the name Delonghi, the assembly is lame, assembled in China, and someone has no luck. (A capricious machine because of this.) And there was also the case that the grinding size mark shifted during grinding - this means you need to clean, wash the coffee grinder and possibly hold the regulator during operation.I believe that for almost 3000 rubles you can buy quite a decent machine - so let him work out this money, without any modifications on our part. For example, there is a Vitek Vitek millstone coffee grinder, it is even cheaper by as much as 1 thousand rubles, if not more !! It is necessary to regularly clean the millstones. I don't wash it that often. Wide and high, the dimensions are not small. The same Vitek has a larger knife grinder in size, but smaller than this one.

Read also: Lg wd 10180 n DIY repair

Completely similar sequence diagram when disassembling another Soviet model - ECMU 50. But modern electric coffee grinder "MIKMA»ECMU IP-30 from a Moscow manufacturer (a subsidiary version of the Soviet prototype), the algorithm is the same up to the fifth point inclusive. Then you need to do the following:

do not remove the bar, but carefully lift and move to the side;
before disconnecting the conductor, you need to push it out of the button body and remove it to the right;
take out the electric motor;
remove the oil seal from the engine shaft;
free the shields from rubber shock absorbers;
remove the spring from the groove inside the device to remove the button;
unscrew the two screws hidden under the rubber ring on the bottom to disconnect the power cord from the case.

Straume 3 is another coffee grinder made in Riga during Soviet times. And here's how she understands you can watch the video:

Probably the easiest disassembly method of all coffee grinder samples. Bosch mkm-6003... The algorithm of actions is as follows: to remove the knife, you just need to unscrew it clockwise, and you can pull out the motor by loosening the power cord and pulling the motor towards you. That's all.With model Bosch mkm-6000 one person can no longer cope. Need outside help or access to a good vice. First, you need to fix the unit in the hands of an assistant or clamp it in clamps so that it is strictly in a horizontal position. Further, with a screwdriver or a probe, you need to pry the bottom in the area of \ u200b \ u200bthe attachment of the power cord. Then, having driven the first screwdriver to a depth of one centimeter, the second needs to grope for the latches and carefully separate them. In this case, you should hold the bottom so that the motor does not fall out, which it presses against. The apparent simplicity of the process should not be misleading, since the main difficulty lies precisely in the latches, the disconnection of which requires great skill and patience.

Basically, all coffee grinders are easy to disassemble. Usually it is enough to unscrew 2-3 screws from the bottom of the case. Sometimes you have to tinker with the latches. But there are also secrets, like a model Bork j700: to get to the printed circuit board, you need to remove the grind switch knob, which is attached instead of the nut with a washer (it is this that needs to be unscrewed). The original opening is also characteristic of the coffee grinder Elmaz... The nuance lies in the fact that you first need to turn the bottom with your palm, and then remove it from the hooks in the body.

Advice! Separately, we can say for the model Vitek 1540... It is not recommended to disassemble it at home. This can only be done by qualified service technicians.

The following will describe methods for repairing coffee grinders that do not require in-depth knowledge. Namely:

the device does not turn on;
knives spin unevenly;
malfunctions in the motor;
break in the power cord;
other typical simple breakdowns.

When the device shows no signs of life, then first of all you should look for a violation of contacts and wire breaks. If the inspection did not reveal a problem, then the reason lies in the electric motor, which can only be eliminated in the workshop, since special knowledge is needed.

Important! When the knives are spinning with sticking, then there is an obvious fault of the burned-out motor winding. At home, for a person ignorant of such matters, rewinding the winding is simply not realistic.

But if the motor works with effort and there is a burning smell, you can try to do without a specialist. Most likely this is due to contamination of bearings or sleeve bushings. To fix the problem, you need to free the shaft and wipe it with alcohol. In case of obvious corrosion, you can treat it with WD-40 or neatly with a sandpaper. For interruptions in engine operation, brushes may be responsible. In this case, cleaning or their complete replacement is required. You can wipe the entire manifold with alcohol if dirt has accumulated on it.

Break points and breaks at the power cord immediately catch the eye. If it is not possible to replace it with a new one, then the wires at the break point should be stripped, re-soldered and re-insulated. There are also cases when, due to contamination of the push mechanism, the blocking fails. This issue can be easily solved by disassembling and cleaning the non-working unit.

Advice! Some grinders (notably the Delonghi KG 79) have a weak link in the form of a capacitor on the electrical board. Over time, it swells up and needs to be replaced with a new one.

In order for the coffee grinder to work as long as possible, you need to follow simple rules of operation and prevention..

Do not leave ground coffee in the device for a long time.
After every grinding need to wipe the inner bowl and knives with a damp cloth.
Do not immerse the device in water when washing, it is better to limit yourself to a wet rubdown.
Machines with plastic enclosures can overheat and fail after long continuous operation. Such failures are frequent with the brands Moulinex and Saturn. If take short breaks in grinding every 20 seconds, the service life of the grinder can be increased.
Need to try to avoid chopping other foods... There is a blender for this.
Should timely change dull knives and millstones... The latter must be replaced after grinding 300 kg of grains, and the former much more often.

Fulfilling simple rules for the care and operation of the device, regularly carrying out preventive work and timely performing minor repairs, you can extend the life of your favorite coffee grinder, which will delight you with many years of faithful service.

Delonghi KG 89/79 is the earliest espresso grinder to replace the discontinued Vitek 1548 Image - DIY coffee grinder repair delonghi kg 79

The Vitek VT-1548 coffee grinder until recently was a kind of starting point in choosing an inexpensive home coffee grinder, which I wrote about in its review, but at the moment it is not on sale. And it remained instead of her to be content with an analogue - a pseudo-grain coffee grinder Delonghi KG 79 or KG 89... The latter differs only in the finish - metal outer panels of the case. And it is she who appears in the photo.

As I already wrote in the review material on choosing a coffee grinder, a pseudo-grinder mill is the minimum acceptable for a carob coffee machine. The cheaper class of knife grinders is only good for Turkish coffee, that is, for a Turk. It is even more difficult for fans of the “alternative” (where a uniform coarse grinding is needed) - even this coffee grinder does not suit them.

By and large, Delonghi KG89 or KG79 are the most affordable burr coffee grinders on the Russian market.... There are, however, and cheaper ones, but these are completely obscene Chinese dairy products that work exactly the same as they cost.

You can choose from a pair of 79/89 solely for the price and appearance, if metal surfaces are important to someone. But I warn you right away that in theory the more expensive Delonghi KG89 is cheaper than the youngest one. And the steel panels of its body, by the way, perfectly collect fingerprints.

If we take apart Delongy 89 or 79 and take a close look at its millstones, we will see an unpleasant feature - teeth and cogs that rise above the main working surface. Unfortunately, it is these teeth (there are 6 of them), and not the notches on the disc itself, that do 80% of the work. Because of this, the coffee bean mostly breaks, crushes like on cheaper knife grinders, and does not grind gently.

However, the remaining approximately 20% of the work still falls on a flat millstone disc, which allows you to get a more or less uniform grinding, similar to the result of a real millstone device.

A regular reader might have noticed that I quoted exactly the same thing that was written in the Vitek 1548 review. This is not surprising, because the millstones are 100% exactly the same. I'm sure they are made at the same plant. Yes, the assembly is in China, it's not scary.

The technical characteristics of the described milk are slightly different from Vitek, but in nuances. In view of the same millstones, the result should be expected to be 95% the same:

Steel flat pseudo-crushed stones, 40 mm in diameter
Although the number of positions on the side dial is not signed at all, in reality there are intermediate values with characteristic clicks. In total, there are 16 degrees of grinding, the positions are fixed.
Dosing regulator (grinding timer) for 2 - 12 portions with intermediate values. In fact - stepless, you can choose very flexibly.
Power 110 W
Bean compartment for 120 grams, coffee hopper for 120 grams
The plastic looks good, without any unpleasant odor.
Cord length 85 cm excluding the plug. Yes, the cord is short, but there is a compartment for the excess at the bottom.

Delonghi KG89 / 79 sells for more than Vitek, which is sad. But the surcharge, in general, can be justified

One could immediately say with an ultimatum that where is the quality of Delonghi, and where is Vitek. But this is the case when Vitek was quite up to par.It happens. It is clear that Delonghi still looks like a class above. She has more strict and stylish, chopped shape, metal finishing in the case of the KG 89 also raises the status of the owner.

More objectively, it is better, and this makes the regulators more convenient. In general, there are two twists on the body, on the left side there is a grind regulator (no values are applied, just from fine Fine to coarse Coarse), in front there is a portion regulator (from 2 to 12). Both of them are made of soft-touch material, pleasant to the touch, not like the bare plastic in Vitka. The grind regulator is much more grippy. There is only one button upstairs, but it is backlit; during the operation of the milk, a soft blue glow comes from it.

The timer, when set to a minimum of 2 portions, grinds until the engine is turned off for 12 seconds. When set for 10 servings, 60 seconds. All intermediate values are proportional.

The final mass of ground coffee is traditionally highly dependent on the grade. But here there are significant differences from Vitka. At the finest grinding (position "Fine") for every two portions of milk grinds about 8 grams (Vitka had 13). On the largest one (position "Coarse") - about 14 grams (Vitka has 20).

This, generally speaking, is not enough. This is the same situation as a real Solis Scala grinder. She also threshed on a fine grind into two portions of 7-8 grams, which is only enough for a single espresso. On a large one, it gave out 15 grams, which is almost the same as Delongy's 14. In this regard, Vitek 1548, as well as Solis's competitor - Rommelsbacher EKM 300, produce more correct packaging.

Please note that these results of my measurements are for guidance. Depending on the grain, it may grind a little more or a little less. But this does not change the dosage conclusion.

The lower compartment for ground coffee is made entirely of plastic and has a lid. To the touch, it looks strong enough, with light impacts on the table, there is no sensation, which is even stronger, and it will crack.

Implemented a switch-on lock without a cover for the bean compartment or the lower hopper. When trying to reach the lower hopper, the grinder shuts off. An inconspicuous limit switch is responsible for this. Opening the top compartment lid also stops. The manufacturer called it Dual Safe - "double protection", but of course there is nothing "proprietary" here.

The speed of rotation of the millstones is not declared anywhere, but it feels like it is at the level of 1200-1300 rpm, the same as that of Vitek. This is quite a lot, but in this class it does not really matter, because the flaws are primarily caused by the structure of the discs, and the speed fades into the background.

As for the grinding, everything is expected - the same as at Vitek. The general problems are the same. Inhomogeneity, which is especially noticeable on a coarse grind. There are also large enough particles, and inclusions, as if from a minimum.

In the case of minimal grinding, the value is extremely close to the result of all other pseudo-grind. It is clear that for the Turks it will not suit exactly, but for espresso it is more or less adequate. Of course, I would like to be smaller. Real millstones, even the cheapest ones in the face of the aforementioned Rommelsbacher, are smaller and, most importantly, more correct, more uniform. Moreover, the coarser you grind on Delonghi KG 89 or 79, the more the unevenness increases, that is, you really need to operate at the minimum. If you are considering purchasing this grinder for alternative brewing methods, be aware that uneven grinding will have a disappointing result.

But uniformity is not the only thing that puts a spoke in the wheel. Photos cannot convey this, you need to shoot under a microscope, but fingers can clearly recognize it by touch. Like other pseudo-grains, where it is mainly not the surface of the disc that grinds, but the protruding elements on it, the coffee particles themselves are sharp, their edges prick the skin of the fingers to the touch. That is, the grains are rather not frayed, but broken, broken.

However, it can be called the starting point for brewing espresso. Although the very, very starting point. All pseudo-grain grinders give this result. The knife ones are even worse and are not at all suitable for espresso. An alternative option is to buy already ground coffee, but there is a different problem, the freshness is not the same.

You can find tons of instructions on the internet on how to upgrade your Delongy 79/89 coffee grinder to grind finer. The methods are different: gaskets, rearrangement of the adjusting ring, something else, I don't remember.

But this will not solve the main problem: crushing instead of grinding. Plus another nuance appears. Mounting of the upper millstone is plastic. But it's pretty durable. Softer are plastic gears that adjust the position of this mount, thereby adjusting the grind. The pressure at the minimum grinding (even reduced relative to the factory one) turns out to be excessive, especially if you screw up to the point that the upper teeth begin to cling to the lower ones. As a result, the very fastening of the upper millstone withstands, but the first gear, for which it clings, often breaks.

When it comes to reliability, the Delonghi KG 89 and 79 coffee grinders have one weak link. This is a CARLI 47k275v-x2 capacitor. Over time, after 5-6 years, with active use, it swells (like, for example, capacitors on motherboards in computers), which results in the interruption of work when the threshold resistance is exceeded. In other words, the grinder stops almost immediately after starting, and the finer the grinding, the faster it stops.

The solution is to simply replace it. It is located on the board, large in size and yellow. Sold freely on radio markets. Although straight arms and a soldering iron will be needed.

Such a coffee grinder should cost 2000-2500 rubles. And then this is a great purchase, you can safely take it for experiments. Four thousand are already plagued by doubts. Still, pseudo-grains are not what you need for high-quality espresso. And in the case of a French press, filter, geyser - it is also controversial due to the unevenness of the grinding, which is the greater, the larger the grinding you are going to get.

In short, an excellent grinder for the inexperienced beginner or to get started. For the "average" it is already a very compromise choice. But in the absence of a real alternative, which is on the second-hand market (millstone coffee grinders on Avito are sold from 5 thousand, keep in mind that real millstones are grinded, you need to check), which is on the primary one. Let me remind you that the next class of coffee grinders starts at 10,000 rubles, this is Solis Scala, Rommelsbacher EKM 300 or the older line of coffee grinders of the same brand Delonghi Dedica KG 521 (not to be confused with the usual knife KG40 and KG49).

If you are aiming to get an espresso at home little distinguishable from a drink from a coffee shop, then this (and all similar pseudo-grain milk) is not for you.

P. S. Anticipating questions - indeed, at the time of writing this review, the formally "cooler" 89th model is always cheaper than the simpler 79th model, which is also sold in few places. It's okay, not fake, it happens.

If you are not an expert, how to fix a coffee grinder? Instruction in pictures.

2. The grinder does not work at all.

It's cheaper to buy a new grinder.

3. The grinder turns slowly.
growls suspiciously suspiciously, a burning smell is felt from within.

Modern coffee grinders are without a doubt reliable and efficient, but they are designed for specific tasks. For example, the grinder may need repairs if sugar is ground in it instead of coffee beans. Other models, especially those made by Bork and Bosch, suffer from moisture penetration into the motor shaft area. But in any case, if the engine has not burned out, you can fix the device yourself.

Most coffee grinders have a fairly transparent disassembly algorithm. There are two types of devices:

knife coffee grinders;
millstone mills.

The latter have a separate algorithm for disassembling the grinding mechanism. The answer to the question of how to completely disassemble a burr-type coffee grinder depends on from a specific model devices. The general scheme is the same. The conical mill knives are attached to the drive shaft with three to four bolts. Unscrewing them is easy. However, when reassembling, care must be taken to ensure that the heads are fully seated in the seats. If you assemble the grinder without tightening the bolts, you can burn the grinder, or you can constantly find fine metal dust in the grind due to the protruding heads of the fasteners protruding into the zone of movement of the grinding mechanism.

Coffee grinder cases are easy to disassemble. It is required to unscrew a couple of self-tapping screws, which are often located on the lower plane, the bottom of the car. Access to them can be either open or protected by the device's legs.

A separate group of coffee grinders keeps on latches... For example, the Bosch MKM 6000 models, the Soviet ZMM apparatus, the EKMU 50 and EKMZ 125 millstones. Here, the lower part of the case is removed using thin probes or screwdrivers with which the latches are bent.

Pulling out the motor to inspect the condition of the bearings and shaft requires dismantle knives... They are filmed in different ways. The most common type of connection is threaded. In this case, the principle of self-tightening is used. If the knife moves clockwise, then a left-hand thread is cut at the connection. If counterclockwise - right. To dismantle the knife, you need to place the slot of the screwdriver in the corresponding slot in the shaft, and then turn the knife block clockwise or counterclockwise, depending on the thread.

Care must be taken when dismantling the knife. The indentation on the shaft is shallow, the metal is soft, so the screwdriver must be placed tightly, pressed down and when unscrewing the knife, apply force gradually.

Over time, the attachment area becomes clogged with the remnants of grindings, gets caught in oxides. Therefore, it is recommended to apply grease WD-40to remove dirt and easily unscrew the knife block. In the case when the clamping nut has a tapered thread and is made of bronze, you can slightly heat the connection area using a soldering iron.Further actions depend from the coffee grinder model... It is necessary to disassemble the device carefully, following the limiters, removing the structural elements from the grooves. More often than not, after removing the knife block, you need to do very little:

Unscrew the plastic fixing nut that secures the grinding bowl. The felt anti-dust pad attached to the fixing nut must not be lost.

Remove the steel axle washer.

Remove the bollard plate by gently pushing it down and out of the restrictive grooves in the body.

Saeco Grinder Detail Example

To repair the engine or determine its performance, a multimeter and knowledge of where to measure the resistance of the windings are needed. Therefore, we will only touch on the relative minor problemsthat can be eliminated even with minimal tool handling skills.

A broken power cable is visible to the naked eye. But if the bend is close to the case, you can detect a breakdown by simply moving the wire. If the device begins to show signs of life, it means that you will have to change the cable.

Lock failure occurs due to clogged pressure mechanism (is in line with the cover groove) or the inner plate is not pressed. Checking the blockage is simple - press on the protruding plastic element with a thin screwdriver. If, at a certain position, the coffee grinder comes to life, you need to disassemble it and remove the dirt.

There may be several reasons: from a cable break inside (to eliminate such a problem, you will need skills in working with a soldering iron) to engine failure. In this case, verification will require special knowledge.In this case, repairs are economically ineffective, rewinding or buying a new engine is required, it is often easier and cheaper to buy a new grinder.

One of the reasons is partial failure of the motor, burnout of one of the windings. Repairs can be a problem. Diagnostics, rewinding or expensive replacement will be required.

The most common cause is contamination and oxidation of bearings or sleeve bushings. This problem is very often observed in the Bosch 6000 series coffee grinders. To eliminate contamination, you need to carefully disassemble the device, check the ease of sliding of all blocks, lubricate the bearings. The Bosch 6000 models do the following:

the sliding sleeve is removed from the shaft (upper part);
the shaft is treated with alcohol;
if there are obvious signs of corrosion, it is removed using special tools or WD 40.

The shaft can be machined sandpaper-zero, you need to act carefully. The procedure shown in the following video is not a commonly used one. With diligence and constant repetition of this kind of maintenance, it is possible to change the gap in the sliding sleeve, resulting in all kinds of problems.

Video (click to play).

The coffee grinder can be repaired periodically. Maintenance procedures include lubrication and decontamination. To avoid accidents, do not operate the grinder in modes not recommended by the manufacturer. For example, grind sugar into powder, grind herbal spices, process large masses of grinding. Each technique has its own operating rules and if you do not violate them, the device will work for a long time and trouble-free.