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Bosch GSR 14,4-2-LI - Sparking - worn brushes - how to replace?

errol 28125 14
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16970451
    errol
    Level 9  
    Hello.
    My Bosch GSR 14,4-2-LI screwdriver for several years recently began to spark like on the attached video. At low speed it is ok but when the engine stops at high speed, sparks fly and smell. I suspect brushes, so now the question is how to disassemble and replace them on this engine? It is pressed on the back. New, original costs PLN 200 (e.g. here ) so its replacement is unprofitable - it is better to buy a new screwdriver.
    Or maybe they are not brushes? I am asking for help in solving the problem.

    [Film: 00778562e2] https://filmy.elektroda.pl/42_1516272673.mp4 [/ film: 00778562e2]
    [Film: 00778562e2] https://filmy.elektroda.pl/87_1516272733.mp4 [/ film: 00778562e2]

    Bosch GSR 14,4-2-LI - Sparking - worn brushes - how to replace? Bosch GSR 14,4-2-LI - Sparking - worn brushes - how to replace?
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  • #2 16970644
    Kamilpl123
    Level 15  
    Hello, brushes in this model are unchangeable. It only remains to buy a new one.

    greetings
  • #3 16971116
    TomekB123
    Level 20  
    Sparking when the engine stops is normal.
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  • #4 16971398
    errol
    Level 9  
    Yes, but not so much spark. Besides, there should not be a smell of burning.
  • #5 16971843
    wiertacz
    Level 35  
    And you can not see the brushes through all the holes in the motor housing?
    The motor can be undressed only not easy because it is pressed.
    You have to work a little to do it.
    Tighten the motor in a vise and use a small screwdriver to straighten these creases.
    I was opening a similar engine once.
  • #6 16972120
    errol
    Level 9  
    With the opening and assumption there will be no problem, I wonder more about whether I will get the right brushes on the market and whether they can be replaced. Because if it's not the only thing that's left to me, I'll get the engine to the end.
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  • #7 16972290
    stanislaw1954
    Level 43  
    errol wrote:
    I am more concerned about whether I will get the right brush on the market
    errol wrote:
    With the opening and assumption there will be no problem
    If you can dismantle a pressed engine, it should not give you a problem to find similar brushes, or to make them.
    errol wrote:
    if they can be replaced.
    Someone put them there ...
  • #8 17062289
    Jacek1983rr
    Level 24  
    High probability that the engine will fit from makita 6281 only the rack will need to be pierced. Enter the external dimension of the impeller, but without the enclosing metal, as it also goes through and the length without the mandrel.
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  • #9 17159621
    ziomekorko
    Level 19  
    Hello. It looks like the engine is fine. You have a screwdriver that has an auto-stop function, ie when you turn it off with the button, the engine stops immediately. For a fraction of a second after releasing the switch, the voltage is applied in opposite phase to stop the motor immediately. At this point, the sparking on the brushes increases, the higher the higher the engine speed. The motor and brushes are okay, the normal operation of this motor in this screwdriver.
  • #10 17174264
    linuxa
    Level 2  
    Hello. I have such a screwdriver, at the beginning there was no sparking, then it appeared, and recently when the holes in plastic pots were drilled, the engine got smoky. The engine was replaced at the authorized service center and after replacing the replaced spark. This bothers me, because in my opinion such sparking shortens the life of the engine. I do not need the auto brake function, can anyone know how to turn it off?
  • #11 17174351
    LENIWIEC_PL
    Level 28  
    linuxa wrote:
    This bothers me, because in my opinion such sparking shortens the life of the engine.

    That's right. But if a screwdriver walked forever then you would not have to buy another one, right? In those times everything is produced in such a way that it would break down as quickly as possible. The Auto - stop function is intended to immediately stop the drill or screw, which prevents it from breaking, etc. ;) For me, the option is not useful.
    errol wrote:
    With the opening and assumption there will be no problem, I wonder more about whether I will get the right brushes on the market and whether they can be replaced. Because if it's not the only thing that's left to me, I'll get the engine to the end.

    If it works, you have nothing to worry about. The engine is already very tired and will probably die soon. Look for another engine or a second screwdriver. These engines are disposable like the motors in toys that look similar. Similar engines also sit in dryers, blenders, etc.
  • #12 17493685
    Bałdyzer
    Level 12  
    I do not want to create a new topic, I will ask if the carbon brushes can be ground off the side, because they fit too tightly into the brush holder? It's about grinding 0.1-0.2mm on the side.
  • #13 17493852
    jerry1960
    Level 36  
    You can sand down. the brush should slide loosely in the brush holder.
  • #14 17494328
    Bałdyzer
    Level 12  
    jerry1960 wrote:
    You can sand down. the brush should slide loosely in the brush holder.

    thanks for the quick answer
  • #15 18154755
    lewkowicz17
    Level 12  
    Hello.
    I have a problem with this screwdriver. It filled me with screwing on a tightly tightened screw that she didn't unscrew and didn't turn on anymore. I haven't undressed her yet.
    What could go wrong?
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Topic summary

The Bosch GSR 14,4-2-LI screwdriver has been reported to spark excessively, particularly when stopping at high speeds, leading the user to suspect worn brushes. Responses indicate that the brushes in this model are not replaceable, suggesting that purchasing a new screwdriver may be more economical. Some users noted that sparking can be normal due to the auto-stop function, which increases brush sparking upon motor shutdown. Others discussed the possibility of disassembling the motor to inspect or replace brushes, although this may be challenging due to the motor being pressed together. There are also mentions of compatibility with Makita motors and the potential for modifying brushes to fit better in their holders.
Summary generated by the language model.
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