ZF 4143.020.211 2 HL 290 Hydrostatic Drive Assembly | Complete Unit

Overview

The ZF 4143.020.211 2 HL 290 Hydrostatic Drive Assembly is a complete, pre-assembled unit designed for demanding mobile machinery applications. This critical component converts hydraulic pressure into mechanical torque, enabling precise speed control and smooth directional changes in ZF transmissions. As a core element of the HL 100 and HL 270 series, this assembly integrates seamlessly with the 4143101046 HOUSING and the 4143301055 HOUSING to form a sealed, high-pressure circuit. The SKU 4143.020.211 denotes a factory-tested unit, ensuring reliable oil flow and load-holding capability in wheel loaders, telehandlers, and industrial tractors.

Symptoms of Failure

• Hydrostatic drive slipping under load: When the assembly wears, internal pistons lose sealing, causing the machine to lose traction or creep unexpectedly during heavy lifting.
• Oil leaks near the drive housing: Deteriorated seals around the 4143298040 CASE or the 0631329135 SPRING PIN lead to visible hydraulic fluid puddles, reducing system pressure.
• Excessive noise or vibration during operation: Worn bearings or misaligned components within the 2 HL 290 produce a whining or knocking sound, indicating imminent failure.
• Erratic speed response: A failing unit causes jerky acceleration or deceleration, often accompanied by overheating of the transmission fluid.

Technical Specifications

Compatibility

This hydrostatic drive assembly is engineered for ZF transmission models that require high-torque, low-speed output. It is a direct fit for the WG180, WG200, and WG250 series, commonly found in construction and agricultural equipment. Additionally, it serves as a replacement unit in the HL 100 and HL 270 series, where it interfaces with the 4143101046 HOUSING and the 4143301055 HOUSING. Always verify your transmission’s serial number before ordering.

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