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Samsung's robotic vacuum featuring Wi-Fi connectivity. Model number: VR2AM7070WS/AA.

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PowerBot R7040 Runs with disengaged powerbrush

my powerbot recently started to show this glitch where it actually runs pretending like it is cleaning but without actually vacuuming anything.(no powerbrush running) If i hit pause and then start again it starts and runs as expected. I’m not sure how often does this happen since it cleans mostly when I’m not home. I was only able to catch this on weekend.

Answer this question I have this problem too

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same here, I just unplugged mine, tired it riding around dirty and not cleaning.

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Mine begin doing the same thing. It was also making a very loud noise like gears and grinding. I have taken the unit apart and determined the same answer as Jameso84. I was able to find that the belt inside the unit was simply a 3-D printer timing belt P/N 2M-136-6. This signifies that the belt is 136 mm in length, 6 mm wide, and has coggs spaced 2 mm apart. I have tried replacing the belt, and it worked for a while but began doing the same thing. I believe since it was grinding long enough, the teeth on the motor side have worn down to the point where it won’t engage the belt properly. I have now ordered the entire power brush motor assembly P/N DJ97-02486B. I have yet to receive it and install it but this should fix the problem.

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Where did you got the new belt? I can't find a place where I could order it.

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Amazon. Came from China.

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Mine did the same thing, and progressively got worse…I found that the small belt in the power brush drive has missing sections and eventually never moved again. It’s pretty difficult to get to.

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are there replacement belts available for it?

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I’m also looking for a belt. Incredibly difficult to find!

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Has anyone figured out where to get this belt? I would also like to find the two gears as well if possible. Ordering the entire assembly for $90 + shipping is one, expensive and two, a waste of a perfectly good motor.

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I just ordered the 2M-136-6 (GT2-136mm) belt from Amazon for $7.99: https://www.amazon.com/gp/product/B07VZ5... This is to get me up and running.

Since I was thinking about it I ordered 3 spares from China, $0.40 each plus $4.00 shipping: https://www.robotdigg.com/product/805/13...

Be sure to specify the 136-2gt-6 belt (136mm long, 2mm tooth spacing, 6mm wide), or whatever size you need.

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samsung should repair free of charge, this is a poor project

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I found that when I spun my brush, there were sections where it was hard to turn. I think that if the motor tries to start in those positions it would get stuck and the vacuum would "pretend" to clean.

I took the motor and belt assembly out (requires removing the vacuum motor and screw on the bracket of the right section camera mount.) There's a single screw holding the motor and belt assembly and you can slide it out to the side of the robot. The belt was loose so it was cogging on the pinion every few revolutions. I opened the clear cover and reseated the screws that mount the motor. This gave tension back to the belt and the brush spins smoothly now.

Good luck to you if you try this fix! The robot has many wire harnesses, be careful not to pull or pinch them!

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Andrey Smirnov will be eternally grateful.
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