ZF 4143.020.167 2 HL 270 Hydrostatic Drive Assembly | Complete Unit

Overview

The ZF 4143.020.167 2 HL 270 Hydrostatic Drive Assembly is a complete, factory-sealed unit designed to manage variable-speed power delivery in heavy-duty ZF transmissions. This assembly integrates the hydraulic pump and motor within a single housing, converting engine torque into infinitely variable output for demanding off-road and industrial applications. As a core component of the HL 100 and HL 270 series, the SKU 4143.020.167 replaces worn or failed hydrostatic units to restore precise speed control and eliminate drivetrain shudder. This complete unit eliminates the need for separate pump and motor rebuilding, ensuring a direct OEM-specification fit for your transmission overhaul.

Symptoms of Failure

• Hydrostatic drive slipping under load: When the 4143.020.167 assembly loses internal sealing, the machine will struggle to maintain speed on inclines or under heavy load, often accompanied by a whining noise from the transmission.
• External oil leaks at the housing interface: Worn seals or a cracked 4143101048: HOUSING can cause hydraulic fluid to weep from the joint between the drive assembly and the main case, leading to low oil levels and overheating.
• Erratic or jerky forward/reverse engagement: A failing hydrostatic unit will cause sudden lurching or hesitation when shifting directions, indicating internal piston or swashplate wear within the 4143.020.167 assembly.
• Excessive transmission fluid temperature: Internal leakage generates heat; if the drive assembly is failing, the transmission will run hotter than normal, potentially damaging the 0634303266: O-RING and other seals.

Technical Specifications

Compatibility

This hydrostatic drive assembly is engineered for ZF transmissions in the HL 100 and HL 270 series. It is a direct replacement for units used in the WG180, WG200, and WG210 models, commonly found in telescopic handlers, forklifts, and agricultural loaders. The 4143.020.167 interfaces with the main 4143298040: CASE and the secondary 4143301055: HOUSING to form a sealed hydraulic circuit. Always verify the transmission serial number to ensure the 2 HL 270 variant matches your application. The assembly also requires the 0631329135: SPRING PIN for proper alignment during installation.

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