There should be 2 flat metal bars on the connection that are spring loaded. Depress and pull hose from vacuum. You may have to push in toward the vacuum while pressing if the seal is tight and/or the hose has not been removed for years. The tabs may be corroded in place and require some WD-40 or other penetrating oil to loosen them up.

Trevor,

does the hose spin freely at the tank end when connected? If not, you may have some corrosion which the wd40 will help with. If that doesn't work, insert a thin metal object, like a nail file, in at the location of the release tabs and see if you can depress the spring locks. Try rocking the hose and/or pushing in hard while depressing the release tabs, the other thing that comes to mind is that someone stuck a thick washer or o-ring which is putting pressure on the locking tabs.

Tom

love my vintage Electrolux vacuums. All of them are stellar performers with great suction/airflow and very, very quiet. My XXX's are still used for hard floors and above the floor cleaning, and later models with power nozzles are my daily drivers.

U can buy a new electrified hose from your local Aerus dealer