While you wait for answers, we may have found some information which could help you.
Click here for Vacuum Cleaner Repair Power Cord
How to fix idler clamp assembly (hardwood/carpet switch) on Eureka SmartVac?
eureka 4870B smartboss, upright vaccum?
How do I remove the canister motor 116.21514?
how can I fix my Eureka 431?
Eureka "boss" #5893 stops sucking after 10mins?
Eureka Model 4870 Motor Replacement?