ZF 4143.351.028 OUTER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.351.028 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 during gear engagement. Designed to withstand high thermal loads and continuous pressure, the 4143.351.028 disk ensures smooth power flow and precise shift timing. When paired with the 4143101009 HOUSING and the 4143301025 HOUSING, this outer disk forms the core of the clutch coupling system in heavy-duty ZF transmissions.

Symptoms of Failure

• Delayed or harsh gear engagement — Worn friction material on the outer clutch disk causes hesitation when shifting from neutral to drive, often accompanied by a noticeable clunk.
• Transmission fluid overheating — A glazed or warped 4143.351.028 disk generates excessive heat, leading to burnt-smelling oil and potential thermal damage to the 0634313603 O-RING seals.
• Slipping under load — When the disk loses its friction coefficient, the transmission fails to hold torque during acceleration, causing RPM flare without corresponding vehicle speed increase.
• Metallic debris in oil pan — Advanced wear produces fine metal particles that contaminate the hydraulic circuit, often requiring replacement of the 4475280018 SCREW PLUG during service.

Technical Specifications

Compatibility

This outer clutch disk is designed for ZF HL 100 and HL 270 series transmissions, including models such as WG180, WG200, and WG210. It is also compatible with certain 4WG-200 and 6WG-200 variants used in off-highway equipment. For proper installation, always inspect the 0501342341 SUPPORT RING and the 4143298457 SEAL KIT to ensure complete clutch pack integrity.

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