Title:
BELT HST 44 (KU-K121112120)
Description:
The KU-K121112120 HST belt delivers precise, reliable power transfer within the hydrostatic transmission system, ensuring smooth and responsive drive performance. As a critical component in the HST (hydrostatic) system, it actively transfers engine power to the transmission—so your machine maintains consistent speed control and seamless operation.
Kubota engineers this belt to handle continuous drive loads and frequent speed adjustments typical of hydrostatic systems. Its reinforced construction resists stretching and deformation, allowing it to maintain accurate tension over time. As a result, you minimise power loss, reduce slippage, and ensure smooth acceleration and deceleration during operation.
The belt’s flexible V-profile improves pulley contact and enhances heat dissipation, which is essential in transmission applications. Consequently, it reduces wear, limits vibration, and extends the lifespan of both the belt and surrounding drivetrain components.
In addition, the durable rubber compound resists heat, oil, and abrasion—ensuring dependable performance in demanding working conditions. Because it meets OEM specifications, you can install it quickly and accurately, restoring optimal transmission efficiency with minimal downtime. Ultimately, this belt keeps your Kubota machine operating smoothly, efficiently, and reliably.
Model Fitment:
Kubota Lawn & Garden Tractors
- Kubota TG1860
- Kubota TG1860G
- Kubota TG1860AU
Kubota Mower Deck / Transmission Systems
Commonly used as the hydrostatic (HST) drive belt within TG series tractors.
Part Details:
- Part Number: KU-K121112120
- OEM Reference: K1211-12120
- Application: Hydrostatic transmission (HST) drive belt
- Belt Type: V-belt (HST drive)
- Function: Transfers engine power to hydrostatic transmission
- Construction: Reinforced rubber with high-tensile cords
- Key Features:
- Maintains consistent tension under variable load
- Supports smooth speed control and drive response
- Resists heat, oil, and wear
- Reduces vibration and slippage
- Extends transmission component lifespan
