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