ZF 4143.020.216 2 HL 290 Hydrostatic Drive Assembly | Complete Unit

Overview

The ZF 4143.020.216 2 HL 290 Hydrostatic Drive Assembly is a complete, pre-assembled unit designed for variable-speed propulsion in heavy-duty off-highway vehicles. This assembly integrates the pump and motor into a single, sealed package, converting hydraulic energy into precise mechanical output for ZF transmissions. As a direct replacement for the OEM unit, the SKU 4143.020.216 ensures exact fitment and restores full hydrostatic functionality. It sits within the transmission’s hydraulic circuit, controlling torque flow to the final drives, and is critical for smooth acceleration and braking in loaders, graders, and industrial tractors.

Symptoms of Failure

When the ZF 4143.020.216 hydrostatic drive assembly begins to fail, operators typically notice these specific issues:

• Hydrostatic drive slipping under load: The vehicle loses pulling power or speed when climbing or pushing, indicating internal wear in the pump or motor swashplate.
• External oil leaks from the assembly housing: Seepage around the main seal or mating surfaces often points to a compromised 4143101030: HOUSING or 4143301055: HOUSING.
• Erratic or jerky vehicle movement: Stuttering during acceleration or deceleration suggests contamination or scoring inside the rotating group.
• Excessive hydraulic fluid temperature: Overheating combined with whining noise signals internal bypassing, often linked to a damaged 0631329135: SPRING PIN that has loosened internal components.

Technical Specifications

Compatibility

This hydrostatic drive assembly is engineered for ZF’s HL 100 and HL 270 series transmissions. It directly replaces units in the WG180, WG200, and WG211 models commonly found in telescopic handlers and compact loaders. The assembly also fits select variants of the WG150 and WG250 where a 2 HL 290 pump-motor unit is specified. Always verify the transmission serial number against the SKU 4143.020.216 to confirm interchangeability.

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