Multiquip 21898 STX Hydraulic Motor Kit Danfoss

The Multiquip 21898 STX Hydraulic Motor Kit Danfoss is a genuine OEM kit designed for the STX55J6 and STX55Y6 hydrostatic ride-on power trowels. This kit delivers a direct-replacement Danfoss hydraulic motor assembly sourced to Multiquip's exact specifications, ensuring the hydraulic drive system performs as engineered. Verified fitment for STX55J6 and STX55Y6 models makes this the confident choice when a full motor kit replacement is required.

Key Features

• Genuine OEM Danfoss Motor Assembly — Sourced directly through Multiquip, this kit matches the original Danfoss hydraulic motor specification for correct displacement, port configuration, and output torque.
• Complete Kit Format — Includes the components needed for a full motor replacement, minimizing the need to source individual parts separately during a repair.
• Confirmed STX Series Fitment — Designed specifically for STX55J6 and STX55Y6 hydrostatic ride-on trowels, ensuring correct hydraulic circuit integration without adaptation.
• Maintains Hydraulic Drive Performance — A correctly functioning hydraulic motor keeps blade speed and drive response consistent across the trowel deck; a worn or failing motor causes erratic blade rotation and loss of drive control.
• Hydraulic System Integrity — Using the correct OEM-specified motor assembly helps preserve system pressure ratings and seal compatibility throughout the hydraulic circuit, reducing the risk of secondary component wear.

The hydraulic motor in a hydrostatic ride-on trowel converts pressurized hydraulic fluid from the machine's pump into mechanical rotation, driving the trowel blade gearboxes and propelling the unit across the concrete surface. On STX-series machines, this motor is central to both blade pitch control and forward drive response — if it begins to wear or lose efficiency, operators will notice sluggish blade engagement, uneven finishing passes, or reduced ground speed. Replacing the motor with a correct-specification Danfoss kit restores full hydraulic output and keeps the trowel operating as intended.

Multiquip 21898 is sold by DHS Equipment as an authorized Multiquip parts distributor. For fitment questions or parts support, 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.