Eureka & Sanitaire HEPA Cartridge Filter - SC5713B, SC5745B, SC5815E, SC5845

Part 61840 is a pleated HEPA cartridge built for Eureka's LiteSpeed commercial uprights and the same machine sold under the Sanitaire name. It sits downstream of the bag, positioned to trap the fine dust that slips past bag media before that air ever gets pushed back out into the space being cleaned.

Restriction here works against a commercial machine twice at once. A loaded cartridge forces the motor to work harder while pickup at the nozzle drops, and once the pleats are saturated past their limit, fine material starts riding straight through instead of staying trapped, leaving behind the telltale dusty smell of a room that looks vacuumed but was not actually cleaned.

Coverage spans the SC5713B and SC5713D, the SC5745B, the SC5815E, and the SC5845B and SC5845D, sold under both Eureka and Sanitaire branding since the two names cover identical commercial hardware. Swap the cartridge once the pleats have visibly darkened rather than waiting for a complaint about weak pickup, since performance has already dropped well before that point.

Pulling the cartridge for a look takes only a moment, since it is meant as a routine service item rather than something buried under other parts. Hold it toward a light source and check the pleats: even light blocking across the whole surface means it is still working, while a patch letting noticeably more light through than the rest usually points to thinning or a small tear rather than ordinary dust loading.

• Part: 61840, HEPA cartridge filter
• Fits: Eureka/Sanitaire SC5713B, SC5713D, SC5745B, SC5815E, SC5845B, SC5845D
• Symptom: lingering dusty smell after cleaning, motor running hot under load
• Construction: pleated cartridge mounted on the exhaust side