~https://youtu.be/5S1f6nLt26A~ More on reddit.com

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Front soft brush was failing to spin on my 810. I found that belt pully had only been pressed on and was now slipping after about 4 years. Fix was to Dremel a keyway on the shaft and inside of pully and drive a brad in to lock it firm. (see image close-up) I think this was really bad engineering by the manufacturer to just press this pully on. Hope this might help someone with the same problem. More on reddit.com

Sharks aren’t repairable, nor do they sell parts. Use it until it breaks, then go for a better brand. More on reddit.com