Instructions for replacing motor brushes on a Bosch washing machine

The operation of an automatic washing machine is organized according to the principle of coordinated operation of all components. To do this, all parts must retain their full functionality.

But as a result of long-term use, the elements of the machine wear out and require repair. One possible problem is the need to replace the brushes.

We will tell you further how to replace the brushes on a Bosch washing machine yourself.

How can you tell if parts are worn out?

Bosch washing machines are predominantly equipped with commutator motors. In such devices, when the rotor moves, contact occurs between the commutator and the graphite brushes.

With prolonged use of Bosch, they begin to wear out. As a result, the engine loses its power or stops completely.

Worn brushes in a Bosch washing machine determined by the characteristics characteristic of this breakdown:

• uncharacteristic engine noise;
• reduction in engine power;
• sudden shutdown of the engine, which is not caused by a power outage;
• the appearance of a smoke smell when the washing machine is operating;
• weak spinning of things due to reduced engine power (even when the speed was set to high);
• failures that are characterized by pauses and jerks in engine operation.

But these signs can be “symptoms” of other disorders in Bosch, so an accurate diagnosis cannot be avoided. For example, a decrease in engine power may also indicate problems with the drive belt.

A noise when the engine is running may be caused by a foreign object caught between the tank and the drum, loose bearing assembly, etc. Codes E02 and F21 on the washer display may also indicate a problem with the brushes.

Without partial disassembly of the washing machine and high-quality diagnostics, it is almost impossible to determine the exact cause of the problem.

How to get to the brushes?

To access the Bosch motor brushes, you need to carry out a number of preliminary steps. You should start with these points:

• disconnect the washing machine from the power supply - pull out the plug from the socket;
• close the water supply tap to the washing machine;
• check that there are no things in the drum;
• move the washing machine away from the wall so that it can be approached from all sides;
• check that you have the necessary set of tools for opening the housing and dismantling the motor (screwdrivers, pliers, wrenches, etc.).

After preparation, you can proceed to disassembling the Bosch washing machine. You should act slowly. All removed screws should be put in one place so as not to get lost.

Procedure for parsing Bosch washing machine:

1. Remove the screws that hold the back panel in place.
2. Remove the back panel and set it aside.
3. Remove the drive belt from the pulley by prying it with your hand and at the same time turning the large wheel.
4. Remove the belt from the motor located below the drum.
5. Place the belt aside.
6. Take photographs of all engine connections. This will help with subsequent assembly after repair work.
7. Disconnect the wires by pulling the connectors towards you.
8. Remove the screws that hold the motor in the socket.
9. Remove the engine.

The first thing that brush wear will indicate during a visual inspection is graphite dust on the surface of the engine itself. Before replacing Bosch brushes, the motor must be wiped of graphite dust (or run over it with a vacuum cleaner).

Further it is necessary to inspect the collector, measure the resistance with a multimeter. If there is an electrical leak to the housing, then simply replacing the brushes will not be an effective solution to the problem - the motor will not start working.

How to change?

To make it easier to work with a Bosch engine, it is best to move it to a table, providing good lighting for the workplace. After this, you can proceed to the process of replacing the brushes.

Procedure:

1. Disconnect the power wire from the contact of each brush.
2. Pull out the brush contact and remove it.
3. If parts show signs of wear, they must be replaced with new ones.
4. Conduct an analysis of the reservoir condition. Minor scratches can be sanded out.
5. Insert new brushes so that they are in tight contact with the commutator. If there is no perfect fit, grinding needs to be done. To do this, apply fine-grained sandpaper to the commutator. One brush is installed and rotated in one direction and then in the other direction. After this, the process is repeated with another brush.
6. Wipe the collector from coal dust.
7. Connect the power wires.
8. Secure the brushes with screws.
9. Rotate the engine by hand to check for proper assembly. If everything is done correctly, you can hear clicks.

You can watch the video to see how to carry out the repair in detail:

Rules for reassembling a Bosch washing machine

After installing the new brushes, the Bosch motor is ready to be placed in the washing machine body. Procedure:

• put the engine in place in the mounting socket;
• fix the motor with screws;
• we connect all the connectors - for this you can use the photographs taken earlier;
• To completely grind in the brushes, it is advisable to carry out the first start without load - the washing machine is plugged into the socket, the “spin” mode is set to the minimum possible speed, the belt is not put on;
• this cycle is run without laundry (without load);
• disconnect the washing machine from the power supply;
• put the drive belt on the motor;
• put the drive belt on the large pulley, turning the wheel slowly, making sure that the belt does not come off the motor;
• install the back cover of the washing machine;
• secure its position with screws;
• put the washing machine in place;
• connect disconnected communications.

Subsequent operation of the household appliance

After the repair has been carried out with the replacement of Bosch brushes, it is necessary to give the new parts time to get used to them.

For this It is important to carry out the first 10 washes in a gentle mode - with the drum not fully loaded. Moreover, overload is prohibited.

During the first starts, the engine may be noisier than usual. This is a normal temporary situation. In the future, you can use the washing machine as usual.

To ensure that the installed brushes in Bosch last longer, It is necessary to adhere to the following preventive measures:

1. The drum should not be overloaded. If there are a lot of things to wash, it is better to divide them into several batches.
2. You should not start the washing machine over and over again without allowing the motor to rest.

Where to buy spare parts, at what price?

The brushes in the engine are replaced not one at a time, but as a set at once. You can purchase spare parts in advance at a specialized store that sells parts for washing machines or order brushes through an online store. When choosing, it is important to consider the Bosch washing machine model. The cost of brushes in online stores on average starts from 300 rubles per pair.

Call the master

Replacing Bosch motor brushes is a job that not every washing machine user can do themselves. If you have doubts about your own abilities, it is better to call a specialist from a company that repairs washing machines. All details and the approximate cost of the work can be discussed with the dispatcher by phone.

On average in the capital, replacing the motor brushes of a Bosch washing machine will cost from 1,800 rubles. Plus the cost of the parts themselves. If other faults are additionally identified, the price increases. After completing the work, the master gives a guarantee and conducts testing.

Conclusion

Failure of brushes in Bosch washing machines is one of the typical engine problems. The problem is solved by replacing parts, after which the washing machine will continue to work for a long time. If you cannot do such work yourself, you can call a repairman.