Introduction
This is the replacement guide for the front caster wheel on the Shark IQ AV993 robot. When replacing the wheel remember to be careful moving parts and taking things out of the robot as some pieces are very sensitive and easy to break. Replacing the front caster wheel is necessary if it is clogged with debris and the sensors are dirty, causing the wheel to not function properly.
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Unscrew the two 14 mm screws on the battery panel using a Phillips #1 screwdriver.
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Remove the five 10 mm screws from the bottom of the device using a T15 Torx screwdriver.
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Flip over the vacuum so that the bottom is facing upwards.
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Remove the five 14 mm screws using a T20 Torx screwdriver.
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Remove the dust bin from the device by pressing down on the release button and pulling out the tray.
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Remove the five 14 mm screws from the bottom of the device using a T20 Torx screwdriver.
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Remove the three 10 mm screws using a Phillips #1 screwdriver.
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Off to the right and left sides of the robot you will find one clip leading to a smaller independent board. Remove the singular 9 mm screw using a T15 Torx screwdriver to free the edges of the plastic element holding the motherboard down. Repeat this for the other side.
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Detach the white connector from the plastic housing. Repeat this for the other side.
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Upon lifting up the motherboard, which will lift straight up, there is a singular clip that connects the rest of the bot. Unclip this, where the clip is large enough to undo with a finger.
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Once this is removed, the motherboard and the plastic it is clipped to can be removed from the rest of the bot.
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Remove two 12 mm screws using a Phillips #1 screwdriver to loosen the front caster wheel.
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This red clip belongs on the end of the piece highlighted in orange. Once broken off, it may be advantageous to replace the whole unit, but with some bending of this metal ring, it can be maneuvered back onto this metal piece. If this is not an option, replacement is the proper route here.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.