Question about Black & Decker Leaf Hog Blower Bv4000

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My blower is electric, and it also vacuums. I accidentally vacuumed up a plastic trash bag that was under a pile of leaves. It made a terrible sound, smelled hot, and won't come back on. I've removed all the pieces of plastic bag from it, and replaced the cord, but it still won't come back on. A friend looked at it, and said the motor "sparks". I can't find anyone in Lexington, KY who will work on this. Can you help? I have piles of leaves!!

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Hi, It sounds to me that when the plastic caused the motor to overheat, that it actually took out the windings to the electric motor. Most motors have an internal overload to prevent this from happening, but it sounds like it has open windings or shorted to ground. If you or you're friend can get together, and if you have an electrical voltage meter, you can check the motor alone to see if it will run. If you can disconnect all moving mechanical parts and isolate just the motor with no load on it, you can use the cord that is attached to the unit and make sure you are getting 120 volts directly to the motor to see if it will run, or use a different cord and bypass the switch and anything that may be between power and the motor, wire the cord to the motor and see if it runs. If not, after applying 120 volts to it, the motor is gone and you will have to replace it. It sounds to me like you are mech. inclined and would be able to handle this with no problem.You might compare the price of a new motor to a new unit to decide if the cost is worth it, and have the motor shipped overnight. If the motor does run under no load and you have an amp probe, the data plate will tell you what the R.L A. should be and the F.L.amps also. I doubt if it will ever run again, and that's to bad the internal did not open and save this motor. But check the motor, you replaced the cord, just bypass the on/off switch and put power directly to motor to solve knowing the condition, and go from there. I hope this has helped you out.
Sincerely, Shastalaker7
PS If it does run after bypassing the switch, look at replacing the switch. You can still use it without one until you get one. Lets hope its that and not the motor. Good Luck

Posted on Nov 17, 2009

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  • Master
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First off, what make and model is your blower? Second, all electric motors "spark"; if you don't believe me, take your electric drill and pull the trigger and look in the case while it's turning...you will see "sparks". Now, what KIND of sparks is your friend seeing? Third, what do you mean, when you say you "replaced the cord"?

Without answers to the questions I have posed, there is little chance of being able to actually repair the blower/vac. However, I can give you some generic electrical motor advice. You said the bag was picked up and the blower/vac made a noise and smelled hot...the smell most likely was electrical in nature and that means the motor may be fried.

When you try to turn it on, do you hear something like a buzzing or humming noise coming from the blower? If you are hearing that noise, the motor is fried and unrepairable (it's not cost-effective to rebuild or replace the motor).

If you don't hear any noise at all, it may be because of a fuse, fusible link or internal breaker. Electric blowers usually have a fuse, fusible link or internal breaker of some sort between the plug, switch and motor housing. If that is the case, it should be a simple matter of replacing or resetting the link, but like I said earlier, I need to know the make and model number to say for certain if there is a fuse, fusible link or internal breaker.

Posted on Nov 17, 2009

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