We need the OPERRATING MANUAL for Hoover Steamvac 6020-900

are you shore it's not the turbine that you have a problem with

The hole the brush shaft goes into is the turbine that turns it. If it will not turn it is seized and should be replaced.

brushes do not spin

You can reach under the brush (on top) and pull down. The manual for an all terrain is here to download

F7452900

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_b96ba3f038cf317c

The brushes are turning by an air driven turbine. The turbine has a pivot bushing made of steel inside of it that gets rusty because of the water that is running through it. The turbine will have to be replaced. You can find a genuine hoover replacement part by following the link below.

Hoover SteamVac Replacement Turbine Brush Gear Part # 91001097

F7425 Parts Link

http://www.usavacuum.com/Hoover-Steamvac-s/109.htm

The brushes are turning by an air driven turbine. The turbine has a pivot bushing made of steel inside of it that gets rusty because of the water that is running through it. The turbine will have to be replaced. You can find a genuine hoover replacement part by following the link below.

Hoover SteamVac Replacement Turbine Brush Gear Part # 91001097

F7425 Parts Link

http://www.usavacuum.com/Hoover-Steamvac-s/109.htm

The brush system on this model has a poor engineering design in that the brushes are running off an air turbine, which uses a steel bushing to spin the turbine which gets rusty from the moisture when the machine is being used. No long term solver. I would replace the machine with a Dirt Devil Platinum Force model

The brushes are turning by an air driven turbine. The turbine has a pivot bushing made of steel inside of it that gets rusty because of the water that is running through it. The turbine gear will have to be replaced. You can access the turbine gear by removing the hood. You can find a genuine hoover replacement part by following the link below. Just find the model number of your Steamvac.

http://www.usavacuum.com/Hoover-SteamVac-Parts-s/105.htm

The brushe until needs to be snapped in very hard; to line up correctly. Pull the unti off and put it back in, good luck.

You should be able to get a manual from Hoover.