I have a roomba 560 in which the Red CHM started to die. After some help from vic7767, I decided to replace it with the new generation 700 series CHM. I also decide to see how much better the new 700CHM is. For this purpose I will be running the CHM with out any modifications for a month every day and then open it up to see how well it holds up to picking up hair, dust and crap. For now I do have initial impressions, as well as preview of what this CHM will be dealing with on daily basis.
The Image bellow shows what the redCHM, and brushes looks like after a cleaning run at my apartment. (This was run for about 30 min as I am trying to revive the battery, but it’s a good representation for comparison)
CHM from top
Typical hair build up on the connection edge ( there is similar amount under the bearing side as well)
The Side where Brushes enter the gearbox, you can see hair being compressed against the bearings(those are about 1 year old.)
Bellow is what the 700CHM looks like in my 560 after running for about 40 min at my apartment.
Here is what the 700CHM looks like from top after cleaning.
Hair at bearing side, which there is not as much as usual, especially human hair is very limited in buildup. It is also ALLOT easier to clean those then the red brushes
Bearing condition of the big bristle brush ( no cleaning was done before taking pictures)
Bearing condition of the beater bar, lots of hair built up on the fat side of the cover, not as much hair was between the short section and on the metal pin it self (this seems to cure a problem where hair will wind up on metal pin and push the bearing out, causing increased friction and CHM failure)
Now on to the Side of the CHM gearbox, not much hair was built up around the gear area and on brush ends
The gear opening, there was very little hair but it seemed to be entering the gear box.
The brushes cleaned with crap that was on them
The AeroVac 1 bin filled with crap
The bristle brush is made of rubbery like material. The 700CHM seems to pick up a lot more stuff then my old red CHM, as well is its way easier to clean. So far I believe the bearing mod should still be done, but now the bearings should last much longer as there is much less hair and crap built up around that area, most definitely extending their life span.
Should you get the 700CHM?
If you already have a CHM with bearings, I don’t think there is a need to change it out for the 700CHM. If your CHM died, then upgrading to 700CHM might be a good idea as the brushes are easier to clean, as well as it seems to pick up more stuff, and finally it costs the same as the green CHM.
Roomba 560 with 700 CHM and AeroVac 1 bin.