Multiquip 43186 O-Ring Size 2-226 Viton

The Multiquip 43186 O-Ring Size 2-226 Viton is a genuine OEM seal designed for STXDF, MD80, and MD105 ride-on power trowels. This Viton-compound O-ring delivers the chemical and heat resistance required to maintain hydraulic integrity in demanding finishing applications. As a direct OEM replacement, 43186 matches the exact sizing and material specification of the original seal, ensuring a proper seating fit within the hydraulic system. Sourced directly through Multiquip's authorized parts network, this is the same component used in original assembly.

Key Features

• Viton Compound Construction — Fluoroelastomer material provides superior resistance to hydraulic fluid, heat, and compression set compared to standard nitrile seals, maintaining a leak-free barrier under continuous operating pressure.
• Exact Size 2-226 Specification — Dimensionally matched to the 2-226 dash size standard, this O-ring seats correctly in its designated groove without shimming, trimming, or adaptation.
• Genuine OEM Component — Manufactured to Multiquip's original design intent, ensuring the seal performs to the same tolerances as the part it replaces in production-built machines.
• Confirmed Fitment — Compatible with STXDF dual-fuel hydrostatic trowels and MD80 and MD105 mid-sized hydrostatic ride-on trowels.
• Hydraulic Leak Prevention — A failed or worn O-ring in the hydraulic circuit can cause fluid loss, pressure drop, and loss of blade pitch control; replacing it promptly restores full hydraulic function.

An O-ring is a circular elastomeric seal seated in a machined groove to prevent fluid from passing between mating components under pressure. In a hydrostatic ride-on trowel, O-rings are used throughout the hydraulic system — at pump ports, valve bodies, motor connections, and fittings — to hold working pressure and prevent external leaks. When an O-ring degrades, cracks, or takes a permanent compression set, it can no longer form an effective seal, leading to hydraulic fluid weeping, reduced system pressure, and inconsistent or unresponsive blade and drive control. Replacing a worn O-ring with the correct Viton-rated part restores the hydraulic circuit to its intended operating condition.

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.