ZF 4143.352.028 OUTER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.352.028 OUTER CLUTCH DISK is a critical friction component engineered for the HL 100 and HL 270 series transmissions. This OEM genuine part sits within the clutch pack assembly, where it transfers torque between rotating shafts under hydraulic pressure. As the outermost plate in the clutch stack, it provides the final friction surface necessary for smooth engagement and disengagement of gear sets. The SKU 4143.352.028 is precision-machined to ZF’s exacting tolerances, ensuring consistent clamping force and heat dissipation during heavy-duty industrial operations.

Symptoms of Failure

When the 4143.352.028 outer clutch disk wears beyond specification, operators typically notice these specific failure modes:

• Delayed gear engagement or “clutch slip” under load — The disk loses friction material thickness, causing the transmission to hesitate before moving.
• Burnt transmission fluid odor — Excessive heat from slipping generates a distinct acrid smell, often accompanied by darkened oil.
• Erratic shifting or harsh engagement — Worn friction surfaces create uneven pressure distribution, leading to jarring gear changes.
• Visible metal particles in the oil filter — Advanced wear sheds friction material and steel debris, contaminating the hydraulic system.

Technical Specifications

Compatibility

This outer clutch disk is designed for ZF’s HL 100 and HL 270 series transmissions. It is also compatible with the following ZF models that share the same clutch pack architecture: WG180, WG200, 4WG180, and 4WG200. Always verify the clutch pack stack height and spline count before installation. For complete assembly, this disk works in conjunction with the 4143101016 HOUSING and the 4143301039 HOUSING, which contain the clutch pack. Use a new 0501318136 GASKET and 0636101084 CAP SCREW during reassembly to prevent fluid leaks.

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