The Filter Queen Motor Guard Disc Filter (Part# 1404000600) — also called the Motor Guard or flat disc filter — is the secondary pre-motor filter used in Filter Queen canister vacuum cleaners. Positioned between the primary filtration cone and the motor compartment, this disc filter acts as the last line of defense before air reaches the motor, capturing fine dust particles and debris that pass through the primary cone. The Motor Guard safeguards the motor and keeps it in optimum working condition. When this filter becomes clogged or is left unchanged too long, the motor is forced to work harder against restricted airflow — leading to reduced suction, increased heat, and accelerated motor wear. Replacing it on schedule is one of the simplest and most effective maintenance steps a Filter Queen owner can take.

This is the circular disc filter for the motor, made from white fiber filtration material. The flat, round design seats directly below the filtration cone housing and above the motor intake, forming a clean, secure barrier without any clips or adhesives required. Its fiber construction allows it to trap fine particulate while maintaining enough airflow to keep motor temperatures in check. The 5-5/8" diameter is consistent across all Filter Queen canister platforms, meaning one part number covers the entire canister lineup without any size variants to manage. Each package contains one disc filter.

The Motor Guard should be changed every 6 months. It fits all Filter Queen vacuum models including the 31X, D31X, D33, RN92, PNG92, AN95X, Majestic, 75th Anniversary, Triple Crown, 360, and Princess. Installation is as simple as lifting the filtration cone assembly, removing the old disc, dropping the new one into place, and reassembling — a 60-second swap that requires no tools. For Filter Queen owners on a maintenance schedule, this filter is best replaced at the same time as the primary cone to ensure both filtration stages are fresh simultaneously. Pairing it with fresh cone filters at each 6-month interval gives the motor complete, uncompromised protection.

At Swiss Boy Vacuum, we stock genuine OEM Filter Queen maintenance consumables because we know these machines are built to last — but only if they're maintained correctly. Filter Queen canister vacuums are precision-engineered systems with outstanding filtration capability, and the Motor Guard disc is a low-cost component that protects a far more valuable one: the motor itself. Whether you're a long-time Filter Queen owner doing routine maintenance or getting a recently acquired machine back into shape, we have the filters you need in stock and ready to ship. Shop online at swissboy.biz or call us at 801-298-3656 — our team has been servicing Filter Queen vacuums across the Wasatch Front since 1963.

Why Choose This Product?

• Protects the Motor Directly — Positioned as the final filtration layer before the motor, the Motor Guard catches whatever the primary cone misses, preventing fine dust from entering and damaging motor windings.
• Fits the Entire Filter Queen Canister Lineup — One part number, one disc size (5-5/8"), covers every Filter Queen canister ever made — no guessing which variant you need.
• Simple 6-Month Maintenance Item — Replaces in under a minute with no tools; pairing it with a fresh cone filter every 6 months keeps the entire filtration system performing at factory spec.
• Genuine OEM Part — Manufactured to Filter Queen's original specifications for exact fit, correct fiber density, and reliable motor protection.
• Extends Motor Life — A clogged or missing Motor Guard forces the motor to overheat and work against restricted airflow. Regular replacement is one of the lowest-cost ways to extend your vacuum's service life.
• White Fiber Construction — The disc visually shows loading over time, making it easy to assess whether a change is due — even before the 6-month mark in high-use environments.
• Available Individually — Sold as a single disc, ideal for top-up purchases between full filter kit replacements or when only the motor guard needs changing.
• Backed by Swiss Boy's Expertise — Sold by a vacuum specialist with over 60 years of Filter Queen service experience. We can help you build a complete maintenance schedule for your machine.

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