The Multiquip 21985 Orifice Fitting 6Mj-6Mo X.078 is a genuine OEM fitting designed for the STXD6i and HTXD6i hydrostatic ride-on power trowels. As a direct Multiquip OEM component, part 21985 is manufactured to the exact dimensional and flow specifications required by the hydraulic system in these machines. Confirm your model code before ordering — this fitting is verified for the STXD6i and HTXD6i series. DHS Equipment supplies genuine Multiquip parts to keep your trowel running at full capacity.
Key Features
- Exact OEM Orifice Diameter: — Manufactured to the precise .078 orifice specification, ensuring correct hydraulic flow restriction and consistent system pressure in your trowel.
- 6Mj-6Mo Port Configuration: — Matches the OEM inlet and outlet thread configuration for a direct, tool-ready installation into the existing hydraulic circuit.
- Confirmed Fitment for STXD6i and HTXD6i: — Verified genuine OEM replacement for Multiquip hydrostatic ride-on trowel models STXD6i and HTXD6i.
- Hydraulic System Integrity: — A correctly sized orifice fitting maintains calibrated fluid flow to critical hydraulic actuators; an incorrect or worn fitting can cause erratic blade pitch response or drive instability.
- Genuine Multiquip OEM Part: — Sourced directly through the Multiquip OEM supply chain under part number 21985, ensuring material grade and dimensional accuracy you can count on.
An orifice fitting is a precision hydraulic component that controls the rate of fluid flow through a specific circuit by restricting flow to a fixed internal diameter. In a hydrostatic ride-on trowel like the STXD6i and HTXD6i, orifice fittings are used to meter hydraulic pressure to blade pitch or drive control circuits, keeping response smooth and predictable. When an orifice fitting is damaged, clogged, or replaced with an incorrect size, the hydraulic circuit loses calibration — resulting in sluggish controls, uneven blade adjustment, or pressure fluctuations that affect finish quality and operator control.
Need help confirming this part fits your machine? Contact the DHS Equipment parts team with your model and serial number for verification before ordering.
Part Details
| Part Number | 21985 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Orifice Fitting 6Mj-6Mo X .078 |
Compatibility & Fitment
| Name | Model |
|---|---|
| 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.
