ZF 4143.000.160 2 HL 100 Hydrostatic Drive Assembly | Complete Unit

Overview

The ZF 4143.000.160 2 HL 100 Hydrostatic Drive Assembly is a complete, factory-sealed unit designed to manage variable-speed hydraulic power within ZF’s HL 100 and HL 270 series transmissions. This assembly integrates the pump and motor into a single, pre-assembled module, converting engine torque into smooth, infinitely variable output for heavy-duty mobile machinery. The SKU 4143.000.160 is the direct replacement for the original hydrostatic drive, ensuring precise control in applications such as wheel loaders, telehandlers, and industrial tractors. When installed, it interfaces directly with the 4143101009: HOUSING and the 4143301025: HOUSING to form a sealed hydraulic circuit, while the 0634313603: O-RING and 4475280018: SCREW PLUG secure the assembly against contamination and pressure loss.

Symptoms of Failure

• Erratic machine creep or surging – Worn internal pistons or valve plates in the 4143.000.160 cause inconsistent oil flow, making the vehicle lurch forward or drift unexpectedly at low idle.
• High-pitched whining under load – A failing hydrostatic drive often emits a metallic screech or whine when the transmission is under heavy torque, indicating cavitation or bearing wear inside the unit.
• Complete loss of forward or reverse drive – If the drive assembly cannot maintain hydraulic pressure, the machine will refuse to move in one or both directions, even with the engine revving.
• External oil seepage from the housing joint – Degraded seals around the drive assembly allow hydraulic fluid to weep from the mating surfaces, often pooling near the 4475280018: SCREW PLUG or housing flanges.

Technical Specifications

Compatibility

This complete hydrostatic drive assembly is engineered for ZF’s HL 100 and HL 270 transmission families. It is a direct fit for models including the WG180, WG200, WG210, and WG250 series, where it replaces the original 2 HL 100 pump-motor unit. The 4143.000.160 also integrates with the HL 270 series in heavy-duty wheel loaders and telehandlers. Always verify the housing alignment using the 4143101009: HOUSING and 4143301025: HOUSING to ensure correct spline engagement and port orientation.

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