Multiquip 11378 Pump Coupling

The Multiquip 11378 Pump Coupling is a genuine OEM component designed for HTX44K4 and HTX44K5 hydrostatic ride-on power trowels. As a direct factory replacement, it ensures the hydraulic pump connects and transfers drive force exactly as the original equipment requires. Sourced directly through authorized Multiquip distribution, this part carries the same specifications as the unit installed at the factory — no guesswork on fitment for HTX44K4 or HTX44K5 operators.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's exact dimensional and material tolerances, ensuring the coupling engages the pump shaft and drive with correct load-bearing capacity for hydrostatic trowel applications.
• Direct-Fit Replacement — Designed to install in the same position and orientation as the original, with matching bore, keyway, and interface geometry for the HTX44 platform.
• Confirmed Fitment — Compatible with HTX44K4 and HTX44K5 heavy-duty hydrostatic ride-on trowels, covering both Kubota K4 and K5 engine variants in the HTX44 series.
• Hydraulic System Integrity — A correctly functioning pump coupling maintains positive, slip-free power transfer to the hydraulic pump, preserving blade pitch control and drive response across the trowel's operating range.
• Verified Part Number — Multiquip part number 11378 matches the OEM bill of materials for the HTX44K4 and HTX44K5, giving you confidence you are ordering the correct component the first time.

The pump coupling connects the engine's output shaft to the hydraulic pump, transmitting rotational force that powers the trowel's hydrostatic drive and blade pitch systems. When this coupling wears, cracks, or fails, the hydraulic pump loses its drive input — resulting in loss of blade control, reduced finishing consistency, or complete loss of machine propulsion. Replacing a worn coupling promptly restores full hydraulic function and protects downstream pump components from the stress of an improperly loaded interface.

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.