Introduction

Quick guide on how to completely disassemble iRobot's Roomba 650 wheel module in order to clean all the internal dust/fiber buildup. The module was not designed to be easily cleaned. This guide involves some force and possibly even damaging the wheel housing

Tools

No tools required.

Parts

No parts required.

With the Roomba upside down and turned off, use the Phillip's 02 screwdriver to remove the one 3.5 mm screw from the center of the side-brush. Set the screw aside and pull the brush out.
  • With the Roomba upside down and turned off, use the Phillip's 02 screwdriver to remove the one 3.5 mm screw from the center of the side-brush.

  • Set the screw aside and pull the brush out.

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Unscrew the four screws that hold the bottom panel using the Phillips 02 screwdriver. The screws will not come out of the bottom panel. They were designed to become loose but not be removed. This prevents you from losing them, and prevents the Roomba from sucking them up if they came out during cleaning.
  • Unscrew the four screws that hold the bottom panel using the Phillips 02 screwdriver.

  • The screws will not come out of the bottom panel. They were designed to become loose but not be removed. This prevents you from losing them, and prevents the Roomba from sucking them up if they came out during cleaning.

  • Once you are sure that all the screws have been loosened as much as possible, then lift the bottom panel up off the Roomba.

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Unscrew the six 12mm screws holding the side wheels on using a Phillips 00 screwdriver. There should be 3 on each side. The screws do not come all the way out.
  • Unscrew the six 12mm screws holding the side wheels on using a Phillips 00 screwdriver. There should be 3 on each side.

  • The screws do not come all the way out.

  • Remove the wheels by pulling them out.

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Remove the shock spring to keep the wheel from jumping off when you remove the bolts
  • Remove the shock spring to keep the wheel from jumping off when you remove the bolts

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Black Friday
Broken doesn't stand a chance.
Push the pin that acts as the pivot point for the suspension. I got away with just pushing with a screwdriver Use pliers to pull from the other end to remove the pin completely
  • Push the pin that acts as the pivot point for the suspension. I got away with just pushing with a screwdriver

  • Use pliers to pull from the other end to remove the pin completely

  • Unscrew all the remaining bolts

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Unscrew the housing bolts Unscrew the two bolts that keep the motor in place Remove the plastic stopper that keeps the motor wires in place
  • Unscrew the housing bolts

  • Unscrew the two bolts that keep the motor in place

  • Remove the plastic stopper that keeps the motor wires in place

  • You should be able to take the motor out now

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With the motor out of the equation, try to move the wheel. If it's still stuck, than the problem is most likely the fibre buildup inside the wheel housing - as expected All the gears should slide right off. Except the last one - the one that actually drives the wheel.
  • With the motor out of the equation, try to move the wheel. If it's still stuck, than the problem is most likely the fibre buildup inside the wheel housing - as expected

  • All the gears should slide right off. Except the last one - the one that actually drives the wheel.

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Remove the main gear using a flathead screwdriver. This is the most difficult step - unfortunately the part was definitely not designed to be serviceable.
  • Remove the main gear using a flathead screwdriver. This is the most difficult step - unfortunately the part was definitely not designed to be serviceable.

  • This will require a decent amount of force and even though the gears seem to be made of nylon there's a chance it will break

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With the main gear out of the way the wheel should slide right off. In my case I had to wiggle it around a bit due to the fibre buildup
  • With the main gear out of the way the wheel should slide right off. In my case I had to wiggle it around a bit due to the fibre buildup

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Remove all the gross hair buildup from the axle. Should come right off. Remove all the gross hair buildup from the axle. Should come right off.
  • Remove all the gross hair buildup from the axle. Should come right off.

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Much better! As you can see the only think that keeps the wheel in place is the main gear. there is no problem of the gear slipping because the axle is splined.
  • Much better! As you can see the only think that keeps the wheel in place is the main gear. there is no problem of the gear slipping because the axle is splined.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

Nuno Covas

Member since: 10/01/2017

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