The Multiquip 21814 is a genuine OEM 90 16Mj 20M0 Fitting designed for Whiteman ride-on power trowel models including STX55J6, STXD6i, HTXD6i, HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, and STX55Y6. As a direct OEM part, 21814 is manufactured to the exact specifications required by the original hydraulic circuit, ensuring a correct, leak-free connection in the hydraulic system. Sourcing a genuine Multiquip fitting means no guesswork on thread form, port angle, or tube sizing — the part seats exactly as intended. DHS Equipment stocks this part to keep your Whiteman ride-on trowel operating at full hydraulic capacity.
Key Features
- OEM-Matched Thread Specification — Manufactured to the exact 16Mj to 20M0 thread and port dimensions of the original hydraulic circuit, eliminating the risk of cross-threading or seal failure from mismatched fittings.
- 90-Degree Hydraulic Routing — The 90-degree bend routes hydraulic line in tight spaces without stressing hose or creating kinking risk at connection points.
- Direct-Fit Installation — Installs directly into the original hydraulic port on compatible Whiteman trowels with no rework, adapters, or thread modification needed.
- Broad Ride-On Trowel Compatibility — Confirmed fitment across STX55J6, STX55Y6, STXD6i, HTXD6i, HTX44K4, HTX44K5, HTX44Y4, and HTX44Y5 hydrostatic and super-sized trowel series.
- Hydraulic Integrity Protection — A correctly installed, properly rated fitting maintains full system pressure and prevents hydraulic fluid loss that would otherwise cause inconsistent blade pitch control or drive failure.
- Genuine OEM Part — Supplied as an authentic Multiquip component, traceable to part number 21814, meeting the pressure and dimensional tolerances of the original design.
A hydraulic fitting serves as the sealed junction point between hydraulic hose or tubing and the system's ports, maintaining pressurized fluid flow between components such as the pump, control valves, and drive motors. On hydrostatic ride-on trowels like the STX and HTX series, the hydraulic system governs both blade pitch adjustment and machine propulsion, meaning a leaking or improperly seated fitting can cause loss of blade control, sluggish drive response, or complete hydraulic circuit failure. Replacing a worn or damaged fitting with the correct OEM part restores full pressure integrity and keeps the hydraulic system performing as designed.
Part Details
| Part Number | 21814 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | 90 16Mj 20M0 Fitting |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | HTXD6i |
| Whiteman Ride-On Power Trowels | HTX44K4 |
| Whiteman Ride-On Power Trowels | HTX44K5 |
| Whiteman Ride-On Power Trowels | HTX44Y4 |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | STX55Y6 |
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.
