Introduction
In this guide you will taking the tool apart all the way down to the gears. You will be able to replace the reduction gear assembly. The reduction gear assembly will fail due to wear and tear. If you are experience grinding or slipping issues in the gearbox of your rotary hammer, the cause is mostly due to a faulty reduction gear assembly.
What you need
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Remove the two 10mm T-10 Torx screws that attach the top brush holders to the motor housing.
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Remove the two 10mm T-10 Torx screws that attach the bottom brush holders to the motor housing.
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