Question about Drills
Two years old and used regularly, but it is well treated and cared for, but this problem just started happening as we were chipping out some concrete around a tub drain.
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Posted on Jan 02, 2017
Depends what damage has been done to the motor. If the tool is still running but sparking you need to check what sort of sparks they are. Short fat blue sparks only going halfway round the commutator (brush end of motor/armature) then it is 90% probable that just your field coil assy is blown. If it is thinner, whitersparks going all the way around then it is the armature and possibly the field aswell. Another way to check is to remove the brushes via the covers on either side at teh bottom of the motor and check the contacting surface. If it is fairly shiney and polishe then there is little sparking and hopefully no cause for concern. If one or both is pitted and dull it has been sparking and burning. If one is shorter and darker than teh otehr this indicates a problem with the field coil. It isn't a massivly hard job to change the motor parts. If you need more advice let me know.
Posted on Oct 25, 2008
I order parts for my Bosch tools at WWW.toolpartsdirect.com. They have the parts lists also so it is easy to find what you need. Don't forget to order some bosch grease for your tool because you will need to carefully wash-out all the old grease with metal bits. Good luck with you repair. Enjoy
Posted on Dec 16, 2008
It is if you continue to use it. The best way to check is unplug the tool and find where the brushes are and check their condition and the condition of the brush spring for burning. when you have them out rotate the tool by hand and look into the brush tube for discoloration of the surface the brushes ride on (commutator) if they are raised or badly discolored then you might have a serious problem with the electrical portion. If the brushes are worn shorter than 1/4" I would replace them Let me know the brand and model and I will try and find a schematic for you to make it easier.
Posted on Apr 21, 2011
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