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I have a Bosch CSB 850 2Ret drill . When I try to start it the motor appears to be strainign and the chuchk will not tutne of turns very slowly. If I try and start it very slowly sometinmes it will get going but then If I stop it I have the same problem sometimes even when it is going but not actually being used the chuck will stop as it the torque control has cut in because it is being overloaded.

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Hello. Your Bosch drill's motor is on it's last legs and needs to be replaced. If you want to send your drill into a Bosch Service Center for the repair, go to this link

If you want to repair the drill yourself, go to this link for the exploded parts diagram showing how to disassemble and reassemble the drill.

If you want to buy the part directly from Bosch go to this link.


Posted on Nov 10, 2010


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Posted on Jan 02, 2017


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