Question about Makita Tools 18V 1/2" Lxt Lithium - Ion Hammer Driver - Drill Kit - BHP451

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Grinding noise While I was using my 6 month old 18v makita drill it started to smoke very alot. It reaked. Now it makes a grinding noise when I run it.

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Possible burnt out in the brush holder assy,checked the motor

Posted on Jun 03, 2008

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I have a makita 6391D cordless drill with 18v ni-cd 1.3ah batteries, just had one battery and charger stolen so have to buy replacements is there any way i can convert it now to lithium batteries if


I can't find a Makita model 6391D drill but they do have a model 6390D drill that takes the 18V Ni-Cd pod battery. The tools and radio don't care what type of battery you use, only that they are 18V. However, to date, Makita does not make a Li-Ion, pod battery. All of their Li-Ion batteries are the slide-on type. Your options for that 18V tool is the 2.6ah Ni-MH battery (PN 193159-1 for a single or 194158-6 for a twin pack), the 2.0ah (PN 192827-3) and 1.3ah (PN 194107-3) Ni-Cd batteries.

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Hi have a makita bhp 452 drill under a month old changed the battery twice still comes up with red green light?


take it back for warranty replacement, I would also take the charger to ensure it is not at fault.

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1 Answer

Drill stopped during a day of usage. Motor was getting hot and just started to smoke. I stopped using the drill so it could cool. Two hours later, it makes a buzzing noise, but the drill will not spin. ...


the heat has seized the motor or plastic gears im leaning more towards the motor
disassemble the drill and take a look all the parts pretty much stay in place see if
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motor that shooed do the trick

hope this helps you
good luck
bob

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Hi my makita 18v impact driver seems to be getting alot weaker throughout the years, still works but no enough torqe


Lithium batteries have a limited lifespan, typically 3 or 4 years, and their capacity between charges decreases over the years.
To extend the lifetime of a battery it should be run completely flat after every few charges rather than topping it up. New batteries need to be charged several times and run flat under normal use before they gain their full capacity.

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Hi i have a makita charger that flashes red and green indicating battery is no good but the batteries are perfect they charge fine on other charges an i even tried it with a brand new battery it starts...


there is a problem with the charger and given the age I would take it to an authorized dealer and get a replacement. If you give me your general area I will try and locate one close to you. Please before voting if you need more assistance let me know. Thank you

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there is a collar inside the clutch assemble that probably has the top of the teeth worn off. Unless you find a service center that has saved some good ones you probably will have to replace the whole clutch assembly.

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Makita 2071 Smoking, probably overheated but still working


When an AC motor is stalled, very high currents pass through the motor windings and melt the insulation on the windings; the smoke was the result of the motor winding insulation being melted. This causes a reduction in motor torque and premature failure.

You should suggest that your neighbor buy you a new drill and he keep the one that he ruined.

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How do i re-assemble a makita 18v cordless drill


check out ereplacementparts.com and type in your model eg bhp451 they should have an exploded diagram.

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The problem could be the brushes and if so it is be quit easy to replace them by pulling the drill apart and slipping the old ones out of there sleeves on the armature and slipping the new ones back in there place . you can buy these brushes at any good tool shop . all you will need is the model number of the drill which you can locate on the side case of your drill . hope this helps.

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