First, press on the foot pedal and lower the vacuum … How to Change a U-Belt on a Eureka Vacuum. The air should sound louder and higher pitched where there is a leak. Belts should be replaced every twelve months for optimal performance. Turn unit on and walk around house listening for a leak, starting in these areas. 3) After the 30 minute period, plug the vacuum back in and turn on the switch. Eureka Vacuum Cleaner 2940. Eureka Upright Vacuum Cleaner Household Type Owner's Guide 2940, 2969, 2970, 2999 30 minutes before attempting to use the vacuum. Verify all vacuum inlets are installed correctly and … If the vacuum still does not work, call the Eureka customer service helpline. Next, we will learn how to change a u-belt on your Eureka Vacuum.