Question about Makita BDF452HW 18V Cordless Lxt Lithium Ion 12" Driver Drill Kit
Posted by Anonymous on
It could be that your brushes (PN CB440) are worn down so much that they can't make full contact with the armature or the armature (PN 619247-1) has a short in it causing excessive arcing. This would be evident by excessive burning or pitting on the commutator where the brushes make contact or missing sections of the commutator..
Posted on Jul 17, 2014
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Posted on Jan 02, 2017
Most cordless drill / drivers like this have electronic switchs which unfortunately would have to be fixed by a repair agent. Depending on it's age - make sure that you tell the agent that it never really worked properly, warrentys only cover parts that were faulty from manufacture and not wear and tear, so it may get fixed for free depending on the repair centre
Posted on May 19, 2009
I would recommend going to Makitatools.com and typing in your model number for a schematic. Basically all you have to do is remove the 4 screws on the front holding the gearcase and then remove all the other screws holding the handle halves together. Let me know if I can help
Posted on Jul 14, 2009
SOURCE: makita impact driver dead spots
Depends on model you have. There are 2 brushless models - BTD132 (14.4V) and BTD144 (18V) - both have big BL letters on housing. According to your picture, you have BTD140 which has brushes. When you open user manual, you can find section dedicated to changing brushes. In case it does not help, you migh want to check trigger. Juraj
Posted on Jun 08, 2010
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