Multiquip 20685 Operator Seat Pivot Block

The Multiquip 20685 is a genuine OEM Operator Seat Pivot Block designed for Whiteman ride-on power trowel models including the HTX44, STX55, HTX6H, STXD6i, HTXD6i, and HTXG6DF series. As a direct OEM replacement sourced from Multiquip, part 20685 is manufactured to the same standards as the original component installed at the factory. This block is a confirmed fit across a wide range of STX and HTX series hydrostatic trowels as well as select HHXD and HHXG series mechanical ride-on trowels. When you need a dependable, correctly specced replacement, the Multiquip 20685 is the part to order.

Key Features

• Genuine OEM Construction — Machined to the same dimensional tolerances as the original pivot block, ensuring correct load distribution at the seat mounting point.
• Drop-In Replacement — Engineered to align with existing mounting hardware on STX and HTX series trowels, so installation follows the same procedure as the original.
• Broad STX & HTX Fitment — Confirmed for HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, HTX6H, HTXD6i, HTXG6DF, STX55J6, STX55Y6, STX6H, STXD6i, HHXD5, HHXD5-ES, HHXDF4-DF5, and HHXG5 models.
• Structural Integrity at the Operator Station — A correctly functioning pivot block keeps the operator seat stable and properly articulated during machine operation; a worn or cracked block introduces unwanted seat movement that affects operator control and comfort.
• Operator Safety Relevance — The seat pivot block is a structural component of the operator station; using a genuine OEM part maintains the integrity of the seating system as originally engineered for these machines.

The operator seat pivot block is the structural mounting component that allows the operator seat on a ride-on power trowel to rotate or pivot relative to the machine frame, letting the operator turn to face the direction of travel as the trowel moves across a slab. It bears the full load of the seated operator during use and must maintain its shape and mounting integrity under repeated stress cycles. When this block cracks, deforms, or becomes loose, the seat loses stable articulation, which disrupts operator positioning and can compromise safe machine control.

For questions about fitment or to confirm this part is right for your machine, contact the DHS Equipment team before ordering.

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.