While you wait for answers, we may have found some information which could help you.
Click here for Vacuum Cleaner Replacement
Eureka 4870 vacuum?
Eureka Boss Smart Vac Thermal Cutoff ?
How to fix idler clamp assembly (hardwood/carpet switch) on Eureka SmartVac?
need diragram for a Eureka The Boss Pro?
Eureka "boss" #5893 stops sucking after 10mins?
Eureka Model 4870 Motor Replacement?