The Multiquip 21855 is a genuine OEM Hydraulic Motor Sauer Danfoss Omtw315 designed for HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, and HTXG6DF hydrostatic ride-on power trowels. As a direct Multiquip OEM component, part 21855 meets the original engineering specifications for the HTX series hydraulic drive system. This motor is a critical drivetrain element, and sourcing the correct OEM unit ensures full compatibility with the machine's hydraulic circuit without modification. If your HTX series trowel is showing loss of drive power or inconsistent blade speed, replacing this motor with the genuine Multiquip 21855 restores proper hydraulic output.
Key Features
- Genuine OEM Hydraulic Specification — Matched to the original displacement and port configuration of the Sauer Danfoss Omtw315 motor used in HTX series trowels, ensuring correct flow and torque output.
- Direct-Mount Replacement — Engineered to bolt directly into the HTX44 hydraulic drive circuit, aligning with existing hydraulic line connections and mounting points.
- Broad HTX Series Compatibility — Fits HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, and HTXG6DF ride-on power trowels, covering Kubota and Yanmar diesel-powered variants in the heavy-duty hydrostatic lineup.
- Consistent Blade and Drive Performance — A properly functioning hydraulic motor delivers steady rotational force to the trowel blades; a worn or failed motor causes erratic blade speed, loss of drive, or complete hydraulic circuit failure.
- Hydraulic System Integrity — Using the correct OEM-rated motor prevents pressure imbalances in the hydraulic circuit that can lead to premature wear on pumps, valves, and associated components.
The hydraulic motor on an HTX series ride-on trowel converts hydraulic pressure generated by the machine's engine-driven pump into rotational mechanical force, which drives the trowel blade rotor and propels the machine. On hydrostatic trowels like the HTX44 series, this motor is central to both blade pitch control and forward drive — making its condition directly tied to finish quality and operator control. When the motor wears internally, it loses volumetric efficiency, resulting in slow or uneven blade rotation, sluggish drive response, and increased heat buildup in the hydraulic system.
For assistance confirming fitment or to place your order, contact the DHS Equipment parts team.
Part Details
| Part Number | 21855 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hydraulic Motor Sauer Danfoss Omtw315 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX44K4 |
| Whiteman Ride-On Power Trowels | HTXG6DF |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | HTX44Y4 |
| Whiteman Ride-On Power Trowels | HTX44K5 |
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.
