Multiquip 20939 Thrust Collar Assembly

The Multiquip 20939 Thrust Collar Assembly is a genuine OEM component designed for MD and STX/HTX series hydrostatic and heavy-duty ride-on power trowels. This part is sourced directly from Multiquip and meets the same specifications as the original equipment, ensuring a direct fit for models including MD105, MD80, HTXD6i, STXD6i, STX55Y6, STX55J6, STX6H, STXDF, HTX6H, HTXG6DF, HTX44Y5, and HTX44Y4. As a genuine OEM replacement, it delivers the fitment accuracy and durability that professional concrete finishing crews depend on. Confirm your model number before ordering to ensure compatibility with your specific trowel configuration.

Key Features

• Genuine OEM Construction — Machined to the same tolerances as the original part, maintaining the precise axial load management the trowel's rotor system requires.
• Direct Drop-In Fitment — Engineered to install in the same location and orientation as the factory collar, with no rework needed to the surrounding assembly.
• Broad Ride-On Trowel Compatibility — Confirmed fitment across MD105, MD80, STX, STXDF, HTX, and HTXD6i series hydrostatic and heavy-duty ride-on power trowels.
• Maintains Blade Pitch Control — A correctly functioning thrust collar keeps the pitch adjustment mechanism operating smoothly, allowing operators to fine-tune blade angle consistently across a full finishing pass.
• Protects Adjacent Drive Components — Proper thrust collar function prevents unwanted axial movement that can accelerate wear on surrounding bearings and pitch control hardware.

The thrust collar assembly manages axial load within the trowel's rotor and blade pitch system, acting as a locating and load-bearing interface that holds rotating components in correct alignment along the shaft axis. When the collar is worn or damaged, operators may notice inconsistent blade pitch response, increased play in the pitch control linkage, or accelerated wear on neighboring bearings and housings. Replacing a worn thrust collar assembly restores the tight tolerances the pitch system needs to deliver a flat, consistent finish across large concrete slabs.

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.