Cant figure out what kinda of screw driver is used to change the belt in the bissell home health vacuum

SOURCE: bissell power force

turn vac over, take of the access plate covering the brush roll, may be 2 to 4 screw. Then you can get to the brush roll and belt. It uses a Bissell Style 7 belt.

SOURCE: belt on this vacuum

Take off the bottom plate covering the brush roll, take out the brush roll, check it to make sure the ends turn freely, the belt goes around the end of the brush roll, then stretch it to go over the motor shaft.

SOURCE: how to change belt on bissell proheat powersteamer

Following in a link to the owners manual. This covers some information regarding the belt. From the manual it says instructions should of came with the belt. Hope this helps.

http://www.bissell.com/images/UserGuides/7901_207.pdf

SOURCE: How to replace the belt on my bissell model 3512-9 vacuum

There are two tabs on the bottom that release the plate and allow the plate to be snapped in and out. They are easy to spot. But, there are also screw holes in some models and there may be screws in them. You might have to deal with both. The screws are unecessary and you can leave them out when you put the plate back on.

SOURCE: repair bissell belt

Here is a link to the belts you need and a manual that you can view which has instructions:

Bissell 3910 Belts & Manual