Sanitaire SC684 drive belt replacement - iFixit Repair Guide
Sanitaire Force SC5845 Commercial Upright Vacuum (w/ HEPA Filtration)
Amazon.com: Replacement Part For Eureka/Sanitaire Repl Hose Assembly for Mighty Mite, 3670 S3681 S3686 SC3683# compare to part 60289-7RL : Home & Kitchen