The Multiquip 21989 Spacer.75 x 2.0 x 4.5 UHMW Black is a genuine OEM component designed for Whiteman hydrostatic ride-on power trowel models HTX44Y4, HTX44Y5, STXD6i, and HTXD6i. As an authorized Multiquip OEM part, 21989 is manufactured to the same specification as the original, ensuring a direct fit with no guesswork at installation. DHS Equipment sources this spacer directly through official Multiquip channels, so you can order with confidence knowing the part number has been verified against current OEM fitment data. Whether you are performing routine maintenance or addressing wear on your trowel, having the correct spacer on hand keeps your machine operating as intended.
Key Features
- UHMW Material Grade: — Ultra-high-molecular-weight polyethylene construction delivers low friction, high impact resistance, and excellent wear life in the demanding mechanical environment of a ride-on trowel.
- Exact OEM Dimensions: — Sized at .75 x 2.0 x 4.5 inches to match the original manufactured specification, seating correctly within the assembly without shimming or modification.
- Genuine Multiquip OEM Part: — Sourced directly from Multiquip, part number 21989 carries full OEM quality assurance for the application it was engineered to serve.
- Broad HTX and STX Series Fitment: — Confirmed compatible with HTX44Y4, HTX44Y5, STXD6i, and HTXD6i hydrostatic ride-on trowels, covering both HTX and STX platform families.
- Maintains Mechanical Alignment: — A correctly fitted spacer holds proper component spacing and alignment within the trowel's drive or blade system; a worn or missing spacer can lead to uneven load distribution and accelerated wear on surrounding parts.
A spacer is a precision positioning component used to maintain a fixed gap or alignment between two mechanical parts within an assembly. In a hydrostatic ride-on trowel, spacers help ensure that rotating and sliding components remain correctly positioned under load, preventing metal-to-metal contact and preserving the geometry of the drive or blade pitch system. When a spacer wears, cracks, or goes missing, surrounding components can shift out of alignment, causing uneven blade wear, increased vibration, or premature failure of adjacent hardware.
Part Details
| Part Number | 21989 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Spacer .75 x 2.0 x 4.5 UHMW Black |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX44Y4 |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | HTXD6i |
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.
