Multiquip 21057 Eaton Vis30/6K 24Cid Motor

The Multiquip 21057 Eaton Vis30/6K 24Cid Motor is a genuine OEM hydraulic drive motor designed for the STX55J6 and STX55Y6 hydrostatic ride-on power trowels. As a direct OEM replacement, the 21057 delivers the correct displacement and pressure ratings required by the STX55 series hydraulic system, ensuring consistent blade pitch control and drive response on the finishing floor. Sourced directly through Multiquip's authorized parts program, this motor is built to the same specification as the original unit installed at the factory. If you're servicing an STX55J6 or STX55Y6, confirming fitment against part number 21057 before ordering is the surest way to get back to work without delay.

Key Features

• Genuine OEM Hydraulic Specification — Matched to the exact displacement (24 CID) and flow characteristics of the Eaton Vis30/6K series, ensuring correct hydraulic output within the STX55 drive circuit.
• Direct-Mount Replacement — Engineered to the same port configuration and mounting interface as the original motor, allowing straightforward installation without system modification.
• Confirmed STX55 Series Fitment — Verified for use on STX55J6 and STX55Y6 hydrostatic ride-on trowels; always cross-reference part number 21057 with your machine's serial plate before ordering.
• Maintains Full Blade and Drive Control — A properly functioning drive motor sustains the hydraulic pressure needed for responsive blade pitch adjustment and smooth forward/reverse travel; a worn or failing motor causes sluggish response and uneven finishing passes.
• Hydraulic System Integrity — Using a correctly rated OEM motor prevents pressure imbalances that can accelerate wear on connected hydraulic components including the pump and control valves.

The hydraulic drive motor on a hydrostatic ride-on trowel is the core component that converts hydraulic flow from the machine's pump into rotational force, powering both blade pitch actuation and ground drive on the finishing deck. On the STX55 series, this Eaton Vis30/6K unit operates within a closed-loop hydraulic circuit, and its internal displacement directly determines how much torque and speed are delivered to the drive system. When this motor begins to wear or fail, operators typically notice loss of drive power, inconsistent blade response, or hydraulic fluid bypassing internally — all of which compromise finishing quality and can lead to further damage downstream in the hydraulic circuit.

For assistance confirming compatibility or placing your order, contact the DHS Equipment parts 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.