Eureka & Sanitaire Pre-Motor Filter - 5840 Lite-Speed Series

Part 71480 is a pre-motor filter built for Sanitaire's 5840 Lite-Speed upright and the identical machine Eureka sold under its own badge. It occupies the small gap right before the motor inlet, positioned as the last line of defense for whatever a bag lets through.

This is one of the least expensive parts in the machine and also the one most likely to get skipped during a routine bag swap. Once it clogs, pickup weakens even with a brand new bag installed, and the motor starts running warmer than normal simply from being starved of air rather than from any mechanical fault. A pad that has turned stiff and grey, instead of staying soft and pale, has already stopped doing useful work.

Coverage includes the C5712A and C5712A1, the SC5713B and SC5713D, and the SC5745B, SC5815E, SC5845B and SC5845D, spanning the two brand names this same platform carried, Eureka and Sanitaire alike. Check it whenever the bag comes out for a look, since a quick glance costs seconds while a starved motor is a far more expensive problem to fix.

In a building where several machines get serviced in one run, this is the filter most often missed, because a bag change becomes routine long before anyone thinks to look any further in. Writing the date of the last filter change somewhere on the machine is a low-effort way to keep a vacuum that runs every day from drifting years past due on a part that costs very little to replace.

• Part: 71480, pre-motor filter
• Fits: Eureka/Sanitaire C5712A, C5712A1, SC5713B, SC5713D, SC5745B, SC5815E, SC5845B, SC5845D
• Symptom: pickup weak despite a fresh bag, motor running warm
• Change alongside: inspect it whenever the bag compartment is opened