Do-it-yourself delonghi coffee grinder repair

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

The first mentions of coffee in Russia are found in documents from the middle of the 17th century, during the reign of Tsar Alexei Mikhailovich. Emperors Peter I and Catherine the Great were coffee fans. The quality of an invigorating drink is very much dependent on the grinding: fine dust will increase the bitterness, large particles will make the coffee watery. What are the types of coffee grinders, how to grind beans correctly? What are the malfunctions of coffee grinders, how to carry out a simple repair of a coffee grinder with your own hands?

The birth of the electric coffee grinder is marked in history on April 3, 1829. On this day, James Carrington received a patent for his electromechanical invention. Up to this point, coffee was ground manually, using a manual coffee grinder. Its device was a reduced copy of a mill, and coffee beans were ground by grinding them between two millstones. With the use of an electric motor, two designs of coffee grinders appeared. In one, all the same traditional millstones are used, and this type is called a millstone. In another, metal knives rotating at high speed took on the role of the grinder and therefore the coffee grinder is called rotary.

The millstone type of a coffee grinder consists of three sections. Whole grains are poured into one. In the second, they are ground and poured into the third section on their own in the form of a ready-to-use powder.

The rotary coffee grinder has one section, in which the loaded beans are ground by means of a crushing mechanism and poured out manually.

In addition, a modern coffee grinder is equipped with additional systems that allow more productive use of the machine's capabilities.

Video (click to play).

— Blocking of starting the engine when the cover is open.

Prevents spilling of grains when trying to turn on the motor with an open or loosely closed lid. As a rule, all grinders are equipped with this function. Blocking is especially relevant in rotary devices.

— Motor overheating protection.

Automatic shutdown of the motor in case of excessive heat. This function significantly extends the life of the unit.

— Pulse mode.

A very useful mode when crushing especially hard products. For example, when grinding dried rose hips or hawthorn berries before brewing. It consists in the fact that the operation of the engine alternates with short pauses, during which the speed of rotation of the working shaft decreases.

A timer in rotary coffee grinders regulates the grinding degree. The longer the grinding process takes, the finer the outgoing product becomes.

— Grinding "depth" regulator.

Usually used in grinders with burrs. Adjustment is carried out by decreasing or increasing the gap between the burrs. Numerous recipes for preparing a coffee drink are based precisely on different fractions of ground coffee beans.

So, for example, to make coffee in a Turk (cezve), you need the finest grinding "into dust". The espresso is slightly coarser for brewing, and the coarser grind is used for the French press. In total, experts have up to 25 degrees of coffee grinding.

Equipping a coffee grinder with an electric motor greatly facilitated the work of a housewife, since grinding coffee beans by hand is a rather tedious task.

The power of the grinder plays an important role in the processing of coffee beans. The more power, the higher the performance of the device. It usually ranges from 80 to 170 watts. On the housing, the power is indicated on the nameplate with the technical data of the electric motor. The label is glued or riveted on the bottom of the device.

True gourmets of the drink claim that when preparing coffee, the most important thing is its correct grinding. There is a whole science that describes all the nuances of this seemingly simple operation. Due to the fact that the popularity of coffee consumption has recently become enormous, narrow professionals have appeared in this area of cooking. Sometimes their opinions differ. However, in matters of grinding coffee beans, experts tend to believe that correct grinding takes place either in a manual coffee grinder or in an electric one equipped with a millstone. The rotary grinder grinds less evenly and the final product contains particles of different sizes. In addition, at high knife speeds, the coffee burns, which leads to a change in its taste.

The grinding time should not be long. As well as the time from grinding to brewing the drink. The longer the coffee is ground, the more essential oils evaporate. Therefore, the optimal grinding time is considered to be no more than 20 seconds.

Over time, the grinder began to be used not only for coffee. It can crush nuts, eggshells, cereals, salt, sugar and other bulk food products. For example, at home, using a coffee grinder, you can make powdered sugar from ordinary loose sugar.

To obtain powdered sugar, it is necessary to load a certain amount of granulated sugar into the capacity of the coffee grinder and turn on the engine for a few minutes. To obtain a high-quality powder, you need to bring the consistency of the powder to a state of fine dust. A little vanillin or vanilla sugar is added for a fragrant smell.

In culinary practice, powder with an admixture of fragrant nutmeg is also used. To do this, first grind a well-dried nut, and then add sugar to it and grind everything together.

It is not recommended to grind foods with a persistent odor in the same grinder. So, for example, you should not crush pepper in it, the persistent smell of which can then be transferred to the coffee drink.

In a manual grinder, the grind size is adjusted using manual adjustment. Typically, the adjusting screw is located where the rotating millstone is attached. By screwing or releasing it, you can achieve such a size of the gap between the millstones, at which the particle size will be optimal. However, you cannot overdo it when reducing the gap. If you set it too small, the metal surfaces will rub against each other, creating small chips that will mix with the coffee and get into the food.

If a rotary coffee grinder with rotating knives is used, the time for complete grinding is determined by visual inspection. To do this, by switching off the grinder, the lid is opened and the degree of readiness is assessed. If the powder is not fine enough, the procedure is repeated. Many grinders of this type usually have a transparent plastic lid. This allows you to control the grinding process without removing the lid or turning off the engine.If the coffee grinder works on the principle of grinding with millstones, then the degree of grinding is regulated using a special adjusting device. This mechanism allows you to increase or decrease the gap between the rotating millstones, and thus change the size of the powder at the exit. In practice, this is expressed in the rotation of the adjusting wheel located on the grinder housing. The adjustment algorithm is quite simple. Rotation of the wheel in one direction leads to an increase in the fraction of ground coffee. In the opposite direction - to decrease. In everyday life, everyone can, with a little experimentation, achieve the desired degree of grinding of the grains.Like any electrical appliance, the coffee grinder can only be used in compliance with the rules and regulations of use.In rotary coffee grinders, the main focus should be on regularly cleaning the working knife. It needs to be cleaned every time you grind coffee. This is done with a damp cloth or napkin.Remains of ground coffee must be carefully removed from the cutting edge of the knife, otherwise they can oxidize and become unusable over time. Naturally, the entire remaining cavity of the working container is subject to cleaning.In the millstones, there is no access to the working surface, but it is advisable to change the millstones themselves after a certain period of time. It is considered that replacement should take place after grinding work of about 250 kg. coffee. Such a durability resource is incorporated in the design of the apparatus, and when it is depleted, the grinding quality decreases.Do not wash the grinder by completely dipping it in water. Since in this case its electromechanical part may become unusable. It is permissible to wipe the case with a damp cloth.During operation, you must adhere to the optimal operating time of the device. According to experts, the continuous operation of the motor is more than 1 minute. negatively affects its durability. If there is a need to continue working, you need to pause for 15–20 seconds. and only then turn on the device again.From time to time, any technique malfunctions. This happens either due to wear of the mechanism, or with the occurrence of a particular emergency situation. The grinder is no exception in this regard. Despite the extreme simplicity of the device, problems occur in its operation. They can be conditionally divided into two categories.The first includes malfunctions that change the quality of work. This is, first of all, insufficient grinding of the coffee beans. This happens with prolonged use of the device without current routine maintenance. So knives and millstones need to be updated from time to time. If this is not done in a timely manner, the degree of grinding will gradually, but inevitably, decrease.In rotary coffee grinders, the crushing blade must be replaced. Sharpening it at home will not lead to anything good, since there is a high probability of disrupting the balance of the product. An unbalanced knife at high speeds will create vibration and the quality of chopping will not noticeably change. Since the cost of a replacement knife is quite democratic, replacing it will not cause financial stress. The replacement is made by rotating the knife in the same direction in which it works. In order to prevent it from turning with the drive shaft, the engine is jammed with a screwdriver. The old knife is removed, the new one is installed in its place.

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.

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. Image - Do-it-yourself delonghi coffee grinder repair

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.

This comment has been removed by a blog administrator.

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!

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.

This comment has been removed by a blog administrator.

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.

Modern household appliances are not durable. And if you still use the device not for its intended purpose, then the rate of its failure increases significantly. This can happen with a coffee grinder if sugar and other harder foods are ground instead of coffee beans. But, regardless of whether the device broke down due to improper operation or for other objective reasons, you should not rush to contact the service center. Most likely, it is quite possible to repair the coffee grinder with your own hands.

Today's electric coffee grinders are available in two types: millstones and percussion grinders. The lion's share space in the case the device is occupied by an electric motor - up to 80%. The rest of the area is dedicated to coffee beans. For instance, at millstones the grinder is divided into three sections. The first is filled with a portion of raw materials for processing. In the second, grinding takes place directly. And in the third, finished products are assembled.

V impact type designs installed knives. It is they who grind the grains into powder at a high rotation speed. Sometimes this mechanism is called rotary. And it only has one hopper that holds roasted coffee beans. Processing takes place in it. And the ground raw materials are simply poured into another container. In terms of its structure, such a coffee grinder is very similar to a blender.

Important! All devices are equipped with a motor lock when the lid is open and overheating protection. In many models, an additional pulse mode has been added, which with short engine stops helps when crushing harder products. For example, when you need to make powder from sugar.

Rotary coffee grinders often set a timer... It is needed to regulate the degree of grinding. The longer the process, the smaller the product yield. In millstone structures, this role is played by grinding depth adjuster... To do this, increase or decrease the gap between the millstones. Unequal grinding fractions are needed to prepare a drink according to different recipes.

Advice! To brew coffee in cezve, you need to grind the beans into dust. And for brewing espresso, a coarser grind is needed.

It is not difficult to disassemble the device if you know the diagram of the device. The design of all grinders is almost the same, but the assembly is different for different brands. And the famous Bosch company has two models with different disassembly methods.

It is easy to find people who still successfully use Soviet household appliances.Produced in a long-defunct country, coffee grinders are not inferior in productivity to their modern counterparts. They will open a list of instructions for the correct disassembly of such devices.

Made conscientiously back in Soviet times ZMM brand coffee grinder you have to disassemble, if not for repair, then at least for cleaning and maintenance work. The sequence of actions is as follows.

Free the knife. To do this, find a slot on the bottom of the case, insert a screwdriver into it and unscrew it counterclockwise.
Using a spanner wrench or pliers, unscrew the plastic nut by half a turn (left or right), which is located immediately under the knife.
Remove the plastic cup holder with the glass.
Remove the metal washer from the retaining axle.
To remove the plate, you must simultaneously press on it together with the blocker and turn it counterclockwise until it comes out of the grooves.
Bend back the retaining spring and release the switch.
Remove the dirt protection washer from the axle.
Move the ring at the bottom of the housing and unscrew the screws securing the electrical cable.
Take out the engine.

Important! When removing the knife, there is a risk of ripping off the slot. After this, further disassembly will be impossible. To prevent this from happening, you must first spray on it from a can of WD-40 and wait a few seconds. This will make it much easier to unscrew.

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:

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.

admin 03/06/2016 For home, for family Comments Off on DIY DeLonghi Coffee Machine Repair Disabled 3,426 ViewsAlmost everyone who drinks coffee made in a coffee machine in his home in the morning is inevitably faced with the fact that after a while, the trickle of coffee begins to degrade, the coffee machine begins to rumble, and by the end of the day it stops working altogether - i.e. the pump pumps water, the lights are on as needed, the boiling water drips a little, but not foam, not a full cup ... ..
If you have a DeLonghi espresso machine with a carob coffee machine, do not rush to take it in for repair, because modern service is built on the principle of doing as little as possible and getting as much as possible. If you have simple tools in your house and a minimum skill of working with your hands, then, following the instructions below, 90% will do without the help of a “master”.For the largest repairs, you will need tools (see Fig. 1.):
Image - Do-it-yourself delonghi coffee grinder repair

Fig 1.
• Screwdriver (1) with a counterpart for installing a curly nozzle (5);
• A set of shaped nozzles (5) - (for example, "A set of bits of type CR-V bits set Model 1041-01-SS4");
• Screwdriver (2) of the "cross" type;
• Traditional medium-sized screwdriver with a flat blade (3);
• Traditional small screwdriver with a flat blade (4) and a handle no more than 5 cm.

Next, we will follow the increasing rate of failures:

g) Using the Screwdriver (4) from the threaded hole of the dispenser, carefully remove and clean the spring valve;

h) Turn the coffee machine over and use two table knives (1) and (2) to remove the plastic handle (3), which regulates the flow of steam when preparing cappuccino coffee (see Fig. 4).
ATTENTION: To avoid damage to the machine parts, lift the plastic handle with gentle movements without skewing, moving it up along the slots on the steam regulator shaft.

Fig 4.
i) Using a screwdriver (1) with a shaped nozzle (5), unscrew the two screws and remove the upper cover (2) of the coffee machine. (see Fig. 5);

Fig. 5
As a result, we will gain access to the internal elements of the coffee machine (see Fig. 5).

ADDITIONAL MATERIALS
Video about the device of the coffee machine

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