How to change brushes on a Bosch washing machine

replacing brushes Failure of the electric motor in a washing machine is quite possible, especially if the machine has been in operation for several years. The main cause of the malfunction is worn out carbon brushes. Replacing them will solve the problem of breakdown, and the machine will work again as before. How to replace brushes in a Bosch washing machine - you will learn about this by reading this article. Such repairs fall into the category of medium complexity, so this work can be done independently.

Preparatory stage

At the first stage, it is necessary to prepare the machine for partial disassembly. It must be disconnected from all communications and pulled out to a free place in the room, providing access to the back cover. Without partial disassembly, it is impossible to say with one hundred percent probability that the brushes are broken. With such a malfunction, of course, there are characteristic symptoms:

firstly, the drum rotates slower than the set speed;
secondly, a characteristic noise appears, but from the noise it is difficult to understand that the brushes are faulty;
Thirdly, on the washing machine display Bosch error appears F21 or E These errors are related to the motor, but it is not a fact that the cause is broken brushes.
fourthly, it is rare, but it happens that the engine sparks and a burning smell appears.

So, in order to unambiguously determine the breakdown, you need to remove the engine from the machine body, for this:

Unscrew the back cover of the case using a hex screwdriver;
remove the drive belt from the pulley;
disconnect the chips with wires from the engine;
Using a socket wrench, unscrew the screws that hold the motor;
remove the engine, if necessary, rocking to the sides.

For your information! In some models of Bosch washing machines, brushes can be replaced without removing the motor.

It's easier to get to the engine through the bottom

Necessary tool

As for the tool for replacing brushes in the engine, nothing special is required. You need 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 Bosch washing machine. They can be purchased at a specialty store, at a service center, or ordered online. When choosing brushes, you need to be careful, because they all seem to be similar, but nevertheless they can have different lengths, widths and thicknesses, in addition, they can have different contact lengths and contact points. On Bosch Maxx series washing machines, brushes of 5*12 or 5*36 mm are usually installed with a contact from the center in the form of a spring with a terminal.

If you are in doubt about which Bosch washing machine motor brushes to buy, then it is better 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 completed, now we are waiting for the replacement of the motor brushes of the Bosch brand washing machine. First you need to find the motor brushes. Some people understand absolutely nothing about the design of a commutator motor, and have no desire to disassemble it; fortunately, for this work we only need to remove the brushes.

where are the brushes on the motor

The carbon brushes of the electric motor of a Bosch brand washing machine are located on the sides of the body. The brushes have a wire that carries a power supply and a spring that squeezes them out and presses them against the rotating lamellas. The appearance of the brushes is quite colorful, you can’t confuse them with anything else.

In order to successfully replace the motor brushes of a Bosch washing machine, you need to correctly remove the old worn-out carbon elements. How to do it?

We take a flat screwdriver or pliers and carefully pry the terminal of the power supply wire and pull it off.
Now we take the motor brush contact of the Bosch brand washing machine and move it away from the wiring.
We pull the contact upward very carefully, after which the spring-loaded brush itself pops up and can be pulled out. When pulling out the brush, remember which side it was facing, so that later you can install the new electric motor brush in the same way.
We inspect the old motor brushes of a Bosch brand washing machine, determine how worn they are and decide whether it is worth replacing or not.

If replacement is required, unpack new carbon brushes. We insert them into the engine traverses in the same way as the old brushes were. Next we push the spring into the traverse. This is inconvenient to do, since the spring is long and you will have to compress it all so that it fits completely into the traverse. Next, insert the terminals into the clamps of the upper part of the traverse and move them towards the supply wire, thus fixing the carbon brush of the electric motor.

Now all we have to do is attach the connector with the wiring to the carbon brush terminal and we can begin replacing the second brush. Experts advise always changing brushes in pairs, even if the second brush is intact, this will extend the service life of the engine. The second brush is replaced in a similar way, then the reliability of all contacts is checked and the motor can be considered ready for installation on the washing machine. The brushes have been replaced!

Similar commutator motors are installed on automatic washing machines of many brands, not just Bosch.After completing the above steps, you can change brushes on an Indesit washing machine, Ariston, Siemens, AEG, washing machines of other brands.

What to do after replacement

Replacing brushes does not guarantee that the motor of a Bosch washing machine will work stably immediately after repair. The new brushes need to get used to it, so we put the motor in place, connect it, assemble the washing machine, install it and do a test run. At this stage, do not spare the engine; set the spin program to the longest possible speed at maximum speed. The more intensively the engine works at first, the better - the brushes will rub in faster and the engine will begin to operate stably.

Don't be surprised if the engine is a little noisy at first, it will soon go away.

In conclusion, we note that if your Bosch washing machine needs a simple repair, which consists of replacing the motor brushes, there is no need to rush to call a technician. In such a situation, it is quite possible to save money and do everything yourself, the main thing is to be careful and have the desire to work a little. Happy renovation!