How to change brushes on a Bosch washing machine

The failure of the electric motor in the washing machine is quite possible, especially if the machine has worked for several years. The main cause of the malfunction is the worn carbon brushes. Their replacement will solve the problem of breakage, and the machine will work again, as before. How to replace brushes in a Bosch washer - you will find out about this by reading this article. Such repairs are classified as medium complexity, so this work can be done independently.

Preparatory stage

At the first stage, it is necessary to prepare the machine for partial analysis. It must be disconnected from all communications and extended to an empty seat in the room, providing access to the back cover. Without partial analysis it is impossible to say with absolute probability that the brushes have broken. With such a malfunction, of course, there are characteristic symptoms:

• firstly, the drum spins at a slower set speed;
• secondly, a characteristic noise appears, but it is difficult to understand from the noise that the brushes are faulty;
• third, on the display of the washing machine Bosch error appears F21 or E These errors are related to the engine, but not the fact that the cause is damage to the brushes.
• fourthly, rarely, but it happens that the engine sparks, a burning smell appears.

So, in order to unequivocally establish a breakdown, you need to remove the engine from the machine body, for this:

1. unscrew the back cover of the case with a hex screwdriver;
2. remove the drive belt from the pulley;
   
3. disconnect chips with wires from the engine;
4. using the socket wrench, unscrew the screws that hold the motor;
5. remove the engine, swinging to the sides if necessary.

Note! On some Bosch washing machine models, brush replacement can be done without removing the motor.

Essential tool

As for the brush replacement tool in the engine, nothing is needed. It is necessary to prepare:

• flat screwdriver;
• tester;
• markers for marking wires or a camera.

To replace, buy a pair of carbon brushes for a specific brand of the Bosch washing machine. They can be purchased in a specialized store, in a service center or ordered on the Internet. When choosing brushes, you need to be careful, because they all seem to be alike, but nevertheless they can have different lengths, widths and thicknesses, and besides, they can have different contact lengths and places for contact output. On Bosch Maxx series washing machines, they usually put brushes 5 * 12 or 5 * 36 mm with a contact from the center in the form of a spring with a terminal.

If you are not sure which motor brushes to buy for the Bosch brand washing machine, it is best to first remove the old brushes from the motor, and only then, having a sample in your pocket, go buy new ones.

Completing of the work

All preparation is over, now we are waiting for the replacement of the motor brushes for the Bosch brand washing machine. First you need to find the engine brushes. Some people don’t understand anything at all about the design of the collector motor, and they don’t have any desire to disassemble it, fortunately for this work we only need to pull out the brushes.

The carbon brushes of the Bosch washing machine motor are located on the sides of the cabinet. The brushes have wiring, the power supply and a spring are suitable for it, which squeezes them and presses them to the rotating lamellas. The appearance of the brushes is quite colorful, you can not confuse them with anything.

In order for the replacement of the motor brushes of the Bosch brand washing machine to be successful, it is necessary to correctly remove the old worn carbon elements. How to do it?

• We take a flat screwdriver or pliers and gently prying off the terminal of the power wiring we take it off.
• Now we take the contact of the motor brush of the Bosch brand washing machine and shift it away from the wiring.
• We pull the contact very carefully up, after which the spring-loaded brush pops up and can be pulled out. When pulling out the brush, remember which side it stood in order to put the new motor brush in exactly the same way.
• We inspect the old engine brushes of the Bosch brand washing machine, determine how worn they are and decide whether to change or not.

If replacement is required, unpack new carbon brushes. We insert them into the engine traverses as well as the old brushes. Then we push the spring into the traverse. It is inconvenient to do this, since the spring is long and it will have to be compressed all the way so that it completely crawls into the yoke. Next, we insert the terminals into the clamps of the upper part of the traverse and shift them to the side of the supply wiring, thus fixing the carbon brush of the electric motor.

Now we just have to put the connector with the wiring on the terminal of the carbon brush and we can begin to replace the second brush. Wizards advise you to always change the brushes in pairs, even if the second brush is intact, this extends the life of the engine. The second brush is replaced in a similar way, then the reliability of all contacts is checked and the engine can be considered ready for installation on a washing machine. Brush replacement done!

Similar collector motors are installed on washing machines of many brands, not just Bosch. By performing the above steps, you can swap brushes on an Indesit washing machine, Ariston, Siemens, AEG, washing machines of other brands.

What to do after replacement

Replacing the brushes does not guarantee that the Bosch brand washing machine engine will work stably right after repair. New brushes should grind, so we put the engine in place, plug it in, assemble the washing machine, install it and make a test run. At this stage, do not spare the engine, set as long as possible the spin program at maximum speed. The more intensive the engine will work for the first time, the better - the brushes will rub faster and the engine will start to work stably.

Do not be surprised if the engine will work noisily for the first time, it will pass soon.

In conclusion, we note that if your Bosch washing machine needs a simple repair, which consists in replacing the electric motor brushes, there is no need to rush to call the master. In such a situation, it is quite possible to save a couple of thousand rubles and do it yourself, the main thing is to be careful and have a desire to work a little. Have a good repair!