Multiquip 12104 Engine JD4020TF005 55 HP

The Multiquip 12104 Engine JD4020TF005 55 HP is a genuine OEM engine assembly designed for STH series hydrostatic ride-on trowels. As a direct Multiquip OEM part, 12104 is built to the exact output and dimensional specifications required by the STH platform, ensuring the drivetrain and hydraulic systems operate as intended. Sourced directly through authorized Multiquip supply channels, this engine is the correct replacement when your STH trowel requires a full power plant swap.

Key Features

• Genuine OEM Power Output: — Rated at 55 HP to match the original engine spec on STH series hydrostatic ride-on trowels, maintaining the hydraulic pressure and blade-speed performance the machine was engineered around.
• Exact OEM Engine Code Match: — Engine designation JD4020TF005 confirms this is the correct assembly for the STH platform, eliminating fitment guesswork during replacement.
• STH Series Compatibility: — Confirmed fitment for Multiquip STH hydrostatic ride-on trowels; verify your model code before ordering to ensure correct application.
• Full Hydraulic System Support: — Delivers the sustained power output needed to drive the hydrostatic system that controls both blade pitch and machine travel — a worn or underpowered engine directly compromises trowel finish quality and maneuverability.
• Genuine OEM Sourcing: — Supplied as an authorized Multiquip OEM assembly, meaning component tolerances, mounting interfaces, and output ratings are held to the same standard as the original build.

The engine is the central power source for the STH hydrostatic ride-on trowel, driving the hydraulic system that controls both the trowel blade pitch and the machine's self-propelled movement. On a hydrostatic trowel, the engine does not simply turn the blades — it powers the hydraulic circuits that allow the operator to make real-time adjustments to blade angle and travel direction, which means any drop in engine performance directly affects finish quality and operator control. When the engine fails or degrades, the entire machine loses function; replacing it with the correct OEM unit, Multiquip 12104, restores full rated output and keeps the hydraulic system operating within its designed pressure range.

For fitment questions or help confirming this engine is correct for your specific STH trowel, contact the DHS Equipment parts 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.