. Broken belt, replace this. Replacing a part can be a little tricky for those not used to DIY projects, but overall it wasn't too bad. Just search for shampoo on YouTube, videos are easy to find.
Pros
Wide Compatibility: Perfectly compatible with 1986, 2007, 1984 series Bissell ProHeat 2X Revolution models. Minor timing belt part number is 1611130, large pump belt part number is 1611129, large wheel flat belt part number is 1606428. (NOTE: THIS BELT KIT MAY NOT BE COMPATIBLE WITH BISSELL PROHEAT MODELS.)