I recently bought a model U4053 (orange, no headlight, one speed, rear conversion) Hoover Convertible. I disassembled and cleaned it, lubricated the brushroll and motor bearings, put on a new bag and belt, and replaced the old vinyl bag with a new cloth one. I've been using it, and it works well except belts keep snapping, and I had the bag blow off of the fill tube once, causing the outer bag to fill up with junk. I bought some new bag rings (a pack of Hoover Lark belts) to try out, any idea why the belts keep snapping? The brushroll and motor both spin freely, and I can't find any burrs or obstructions in the belt path. The belts aren't 'wearing' in the way I'm used to vacuum cleaner belts failing (burning smell, evidence of burnt rubber on belt and brushroll/motor shaft) but just plain snapping.
Also, as a random observation: it's possible to use the front-conversion tools on a machine with rear conversion, the front converter fits onto the brushroll cover just fine.
Also, as a random observation: it's possible to use the front-conversion tools on a machine with rear conversion, the front converter fits onto the brushroll cover just fine.