My filter was fine, but after disassembling the front end of the unit, and taking apart the turbine/gearbox for the brushes, I found the bushings for the main turbine to be severely corroded. I just cleaned eveything up and ran some scotchbright through the bushing, and now it works. Talk about planned obsolescence.
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My cordless Shark Vacuum brush bar would stop working each time after a few minutes of use. I was getting ready to throw the vacuum cleaner away, but decided to pull the bottom cover and check it first. I did the following modification and now it works great!
Just a few notes before attempting this tip: You need to be carefulafter this modification if you see the brush bar stop as this couldmean the bar is really jammed and there is a risk of the brush barmotor burning out. Most of the time disabling any fuse or circuit breaker is a very bad idea and could ruin equipment and even cause a fire. In the case of this tip, only consider the modification if you areready to get rid of the Shark because of the brush bar problem. Another option is to replace the circuit breaker, however consideringthe time and money involved vs. the cost of the vacuum cleaner it mayor may not be worth it to you. I did this modification to my cordlessShark about 4 months ago, and have had no further problems with it. I takes about 15 minutes to do this modification using a screw driver and wire cutters.
1. With the vacuum cleaner off, check the brush bar by manually rotating is with you hand. It should not be jammed or very difficult to turn. If so, remove the brush bar and clean it. Try the vacuum again. If you still have a problem with the brush bar stopping, proceed to next step. 2. Remove bottom cover around brush bar / motor. 3. There are two wires going to the brush bar motor, one wire includes a small circuit breaker. 4. Clip the circuit breaker out of the wire and reconnect the wire straight to the motor. 5. Re-install bottom cover.
brushes not turning are usually caused by the turbine bearings have seized. The turbine cost is about $35 average. on the bottom you can check a pull out filter to clean. there are also 2 screws that are recessd check by hand for tightness that hold the turbine. checkthe brushes for cleaning and free of debris. check the square shaft on the brushes as well. take it to a trusted vac shop who works on hoovers if you are not mechanically inclined for this type of repair.
Flip the vacuum cleaner over and check the roller brush. Is it full of string and hair? If so, unscrew the four phillips-head screws holding the plate on that covers the roller brush; pull out the brush, and cut off/clean off all the hair and string. Replace everything and try running the vacuum. Alternate solution: perhaps the belt that makes the brush go around is broken. If so, follow the above steps to remove the roller brush, then replace the belt.
The front brush motor will not engage until the power is turned on and the handle is in the down position. In the upright position the brush motor wont engage. Typical faults will be the belt is broken and needs replacing or the fornt brush motor needs replacing.