Multiquip 366640 90-Degree Fitting 4MJ 4FJ

The Multiquip 366640 is a genuine OEM 90-Degree Fitting 4MJ 4FJ designed for Whiteman ride-on power trowels and ride-on roller screeds, including the STXD6i, HTXD6i, WRS5200, and WRSPUDF. As a direct OEM component sourced from Multiquip, part 366640 delivers the exact thread specifications and dimensional tolerances required for a proper hydraulic or fluid line connection. This fitting is a critical sealing and routing component in the hydraulic circuit, and using the correct OEM part helps maintain system integrity across demanding troweling and screeding applications. Verify your model code against the fitment list before ordering to confirm compatibility.

Key Features

• OEM-Certified Thread Specification — Machined to the exact 4MJ to 4FJ thread engagement dimensions Multiquip specifies, ensuring a leak-free connection without relying on sealant patches or adapters.
• 90-Degree Routing Geometry — The right-angle configuration allows hydraulic or fluid lines to change direction in tight equipment housings without stressing hose ends or fittings.
• Direct Drop-In Replacement — Matches the original mounting orientation and port size on STXD6i, HTXD6i, WRS5200, and WRSPUDF machines, connecting directly to existing line ends.
• Confirmed Fitment Across Two Equipment Families — Verified for Whiteman hydrostatic ride-on trowels (STXD6i, HTXD6i) and Whiteman ride-on roller screeds (WRS5200, WRSPUDF).
• Hydraulic System Integrity — A correctly seated fitting maintains proper fluid pressure and flow; a damaged or mismatched fitting can cause fluid weeping, pressure drop, and loss of hydraulic control response.
• Fluid System Safety Compliance — Using the OEM-specified fitting ensures the connection holds at rated system pressures, reducing the risk of uncontrolled hydraulic fluid release during operation.

A 90-degree fitting is a threaded connector that redirects hydraulic or fluid lines at a right angle within a machine's plumbing circuit. It allows hoses and lines to route cleanly around structural members and housings without sharp bends that could crack or collapse a hose wall over time. When a fitting fails — through thread wear, cross-threading, or seal damage — fluid can leak at the joint, causing system pressure loss, erratic hydraulic response, or complete loss of function in pressure-dependent systems like trowel blade pitch control or screed drive circuits.

For fitment questions or to confirm part 366640 is correct for your specific serial number, 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.