Multiquip 1146 Air Filter with Dust Seal

The Multiquip 1146 Air Filter with Dust Seal is a genuine OEM replacement designed for a wide range of Multiquip and Whiteman equipment, including HTN, HHN, JWN, and CA series power trowels, MRH601DS and RX1575 rollers, QP4TK and QP4TKT trash pumps, and DLW300ES and DLW400ES series welders. As a factory-sourced component, the 1146 meets the original design specifications set for each compatible machine. This part ships as a complete air filter and dust seal assembly, so everything needed for a proper service replacement is included. Confirm your model code against the fitment list before ordering to ensure this is the correct filter for your application.

Key Features

• Genuine OEM Filtration Media — Factory-sourced filter element matched to the original airflow and filtration efficiency rating required by Kohler, Onan, and Honda engine applications across compatible models.
• Integrated Dust Seal Included — The dust seal ships as part of this assembly, ensuring the filter housing seats correctly and prevents unfiltered air or fine debris from bypassing the element at the sealing surface.
• Broad Multiquip Fitment — Compatible across HTN, HHN, JWN, and CA series power trowels, MRH and RX series rollers, QP4TK trash pumps, and DLW series light welders — one part number covering multiple machine families.
• Protects Engine Internals — A properly seated air filter with an intact dust seal prevents abrasive particles from entering the combustion chamber, which directly affects cylinder wear, oil contamination, and engine service life.
• Direct OEM Drop-In Replacement — Produced to the same dimensions and mounting interface as the original, allowing straightforward installation during routine air filter service intervals.

The air filter is the engine's first line of defense against airborne dust, concrete particles, and debris — all of which are present in high concentrations on flatwork and compaction jobsites. The filter element captures contaminants before they can enter the carburetor and combustion chamber, where even fine particles cause accelerated wear on pistons, rings, and cylinder walls. The dust seal works in tandem with the filter element by closing off any gap between the filter and its housing; a cracked or missing seal allows unfiltered air to bypass the element entirely, making the filter itself ineffective. Replacing both the filter and dust seal together — as this assembly provides — ensures the air intake system is fully restored at each service interval.

For fitment questions or to confirm this part is correct for your specific machine, contact the DHS Equipment team directly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.