Multiquip 21771 Hose Assembly 3/8 ID x 11.50 6FJ Straight Ends

The Multiquip 21771 Hose Assembly 3/8 ID x 11.50 6FJ Straight Ends is a genuine OEM hydraulic hose assembly designed for Whiteman ride-on power trowel models including the STX55J6, STX55Y6, HTX44Y4, HTX44Y5, STXD6i, and HTXD6i. As a factory-original component, it meets the same specifications as the part it replaces, ensuring a correct connection within the hydraulic circuit of your hydrostatic trowel. DHS Equipment supplies this as a direct OEM replacement so you can restore your machine to proper operating condition with confidence. Confirm your model code before ordering to ensure this assembly matches your specific trowel configuration.

Key Features

• Genuine OEM Hydraulic Integrity — Factory-original hose assembly built to the exact pressure rating and dimensional spec required by Whiteman hydrostatic trowel hydraulic circuits.
• Straight 6FJ End Fittings — Straight-thread JIC-style female fittings on both ends connect directly to existing ports without adapters or rework.
• Broad Hydrostatic Trowel Fitment — Compatible with STX55J6, STX55Y6, HTX44Y4, HTX44Y5, STXD6i, and HTXD6i Whiteman ride-on power trowels.
• Maintains Hydraulic Drive Performance — A correctly seated hose assembly keeps hydraulic fluid routing to the drive and blade-pitch system at specified flow and pressure, supporting smooth trowel operation.
• Prevents Hydraulic Fluid Loss — A cracked or worn hose in this position can cause pressure drops, erratic blade pitch response, or fluid leakage — replacing it promptly protects the hydraulic pump and motor.

This hose assembly routes pressurized hydraulic fluid between components within the hydrostatic drive or blade-pitch control system of Whiteman ride-on trowels. Maintaining a sound, leak-free hose at this connection point is essential for consistent hydraulic pressure, which directly controls both machine travel and blade angle adjustment. When a hose in this position deteriorates — through cracking, abrasion, or fitting wear — operators may notice sluggish or unresponsive blade pitch, reduced drive responsiveness, or visible fluid loss, all of which require immediate attention to avoid further hydraulic system damage.

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.