Question about Hammer Drills
It is very likely the carbon brushes that contact the motor to transfer electricity to the windings. those tend to crack and get stuck or wear out. They need to be moving in and out freely and have spring pressure pushing them in towards the motor. you can get new ones cheap at ereplacementparts.com if they sell them.
Posted on Oct 12, 2018
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Posted on Jan 02, 2017
look at the back of the brush holder for a tab that the forward/reverse lever locks into, it might be broken not allowing it to shift.
Posted on Mar 03, 2009
SOURCE: Bosch 11247 Hammer drill works
Usually replacing the o-rings on the piston, striker and Impact bolt will solve any hammering issues. That is considering there is no damage to the mechanical parts in the hammer mechanism.
Posted on Apr 13, 2009
SOURCE: kango 950k
it sounds like it needs service,service is taking lower unit apart cleaning and regrease with special kango grease, if unit was serviced recently or not used much, grease could be real old and dry,sometimes you have to warm up unit before they start hitting correctly,,also if used a lot could be dirt build up,inside bit holder.remove bit holder clean out dirt regrease with heavy bearing grease,just grease the lower part,not very much grease is needed
Posted on Oct 05, 2009
Ureythn GE00 is madr by Fuchs in Germany - see their website.
Darina is made by Shell - see internet for comparable grease
Posted on Mar 02, 2010
SOURCE: my hammer drill won't hammer.
when was the last time serviced?? If not recently then you would need to replace the o rings and look for other sticking/worn parts. Give me the exact model number and I will try and find you a breakdown and a rebuild kit. They are not that bad if you are handy with tools and take your time. Let me know
Posted on Mar 21, 2010
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