How to test a generator without special equipment

How to test a generator without special equipment
How to test a generator without special equipment
Anonim

Of course, a complete repair of the generator is not shown to be done by hand, but a check can always be provided. The most important component of the test will be a multimeter, or, as it is also called, a tester.

Now we start by checking the regulator relay. How to check the generator with a tester? Very simple. We take a multimeter and put the switch in the "measurement" position. We start the car and measure the voltage at the battery terminals, as well as at the outputs of the generator itself. Its component should reach no more than 14.2 V. Next, the accelerator is pressed and the voltage is measured again. A deviation from the norm, even half a watt up, means the regulator is not working properly.

how to check the generator with a tester
how to check the generator with a tester

Also, the generator includes a diode bridge, which also needs to be checked. In this case, we switch the multimeter to the "Sound" mode and begin to carry out the test. It is worth noting that this part includes 6 diodes, they are divided into 2 equal parts - positive andnegative. When checking, a squeak will occur. But it is worth noting that the check must be carried out in both directions. If a squeak occurs in both cases, then you need to replace the part, as this symbolizes that the bridge is broken.

how to check generator
how to check generator

Now we will learn how to check the generator, namely its parts - the rotor and stator, without which its operation is unthinkable. First, disconnect the stator output from the diode bridge. Since it is a cylinder with an internal winding, it is worth first making a visual inspection. Next, a multimeter is taken and the “resistance measurement” mode is turned on. A good winding will tend to infinity on the scale of the device, but readings below 50 kOhm mean a quick replacement of the generator.

How to check the generator and stator is more than clear, but the rotor is a little more difficult to handle. What is this device? This is a metal rod with an internal excitation winding, on one of its sides there are contact rings, with the help of which the brushes slide along them. Just like the stator, the rotor must be inspected for damage after removal. It is best to find out from knowledgeable people how to check the generator, or contact a car repair shop, since it is preferable to inspect the rotor on specialized equipment. The brushes that are placed on this part have a certain protrusion from the holder, which is not more than 5 mm. It is also worth evaluating how freely they move on the holder and whether they are worn out. When installing the generatorplace must be done with care and carefully checked.

how to check a vaz generator
how to check a vaz generator

Also, how to check the VAZ generator can be found in the special literature. Do not forget about checking the bearings of the generator, because their incorrect operation can lead to serious damage. When these parts wear out, a characteristic noise occurs, which is clearly audible, even if you are near the car. Wear may be due to incorrect alternator belt tension.

Well, now we know a little about how to check the generator on our own, and yet it is better to seek help from specialists.

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