Philips Homerun 2000 Grinding Gearbox Fix

ID: 206118

Description: Hi, this guide is made to Fix the Grinding...

Turn off the Device with the Switch at the bottomside
Lay the robot upside down and remove the clipped in Main-Brush cover
lift the brush on one side and pull it out of its housing
Pull out the Front Sweeping brush. its simply clicked in place.
Pull out the Water and dust tank. if there is still water in the tank you may need to turn the bot around to not spill water on it. the robot needs to be upside down for the next step.

Locate the Battery housing close to the free-spinning frontwheel
Remove the 4x PH1 Screws securing the battery compartment
Use the pulltab in the middle of the battery to gently pull it out
Unplug the battery from the system and store it somewhere safe during the repair.

With the robot beeing upside down, locate the 4 "grabbing pins" you find them where the Dust/water tank was.
Use a screwdriver or any other suitable tool to push these in to gain access to the top cover. Be Care full to not break these of.
Turn the robot on its wheels
use a small Pry tool or simply your hands to lift off the top cover. there are more "grabbing pins/Claws" holding it so you need to use a little bit of force. dont just bend the top away, use the shortest possible lever point to unclip
The top cover is not connected to anything once removed, simply put it to the side till assembly
Near the Top Laser scanner (the round orange thingy) there are two PH2 Screws in a recess about 20mm deep. Dont mismatch them with the screws at the surface directly at the surface near the laser unscrew these 2 recessed screws and mark them for the reassembly.

For this step, there are no Hidden screws under a cover or sticker. all screws should be visible.
Turn the robot upside down again
Unscrew all 8 PH1 screws on the Front bumper and unclip the C-shaped cover. you can now remove the whole bumper by pushing it downwards. this doesnt need force, it almost should fall down by its own
Unscrew the 6 PH2 Screws at the bottom, there are once again in a Recess about 20mm Deep make sure to remove the screw from the hole and store it somewhere safe to not loose it in further steps
For the next step, you need to use your force very carefull, dont just rip the housing apart there is a cable connecting both halves inside wich needs to be unplugged with the bottom halfway removed
You can now pull apart the whole housing, use the two overhangs near the dust container and gently lift the bottom up. there are a few clips holding it down so it may make a cracking sound while opening it and you need a little bit of force. if it doenst come off with a bit of force, check for screws you may forgot to unscrew
Carefully use a kitchen knive or another suitable tool to disconnect the wire harness used for the laser sensor at the top. you can use your fingers instead but dont pull on the wires directly to not harm the connector.

With the housing open you can now access the Motor+Gearbox driving the Main-Brush.
you can, but dont need to disconnect the motor from the Mainboard. the wires are long enough to work without removing.
At the Gearbox there are two PH1 screws wich need to be unscrewed.
Rotate the Gearbox 100° Counter clockwise and lift the whole motor+gearbox out of the housing
Carefull pull of the Foam Seal from the Gearbox cover, but leave it sticking to the gearbox itself.
Remove the 4 PH1 screws holding the Gearbox cover.
You should now see the reason for the Grinding Noise. the gearbox is filled with gunk wich failed to leave the gearbox trough the hole at the bottom.
You can, but dont need to disconnect the gearbox from the motor. Removing it could make the following step a bit more easy.

Only use a Dry Cloth for cleaning, the belt may react to water.
Clean the belt and the inside of the gearbox until it mostly white again. make sure to not bend the belt to much especially it its older, it may break. should be a non-issue for a newer device
Remove Stuck dirt from the cogs with the tip of the PH1 screwdriver or the cloth

If Removed, screw the gearbox back to the motor
Put the belt in the Gearbox again and make sure the belt is sitting on both cogs correctly. put the Main brush in the square hole on the output side of the gearbox and spin it a few times per hand to make sure its spinning freely and without grinding.
Look inside the motors ventilation holes to make sure the belt is connected to the output side, if you spin the gear and the motor doenst move, it may isnt connected right
if it doenst spin at all, or only with force, the belt may be stuck or pinched somewhere. in both cases disassemble the gearbox again and check if the belt is sitting right. repeat these steps if needet.
After rebuilding the gearbox and making sure it spinns freely, you can now re-assemble the device by doing all steps in reverse order.
After Assembly of my device and turning it on for the first time, it made a horrible Squeak for a 3-4 seconds, after this initial Squeak the bot has been silent as Factory new and vacuums like a champ again.

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