ZF 4143.351.012 OUTER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.351.012 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 disk in the clutch stack, it provides the necessary friction surface to engage and disengage gear sets smoothly. The SKU 4143.351.012 is precision-machined to ZF’s exacting tolerances, ensuring consistent clamping force and heat dissipation during heavy-duty industrial operations. When installed alongside the 4143101014: HOUSING, this disk maintains proper alignment within the transmission’s rotating assembly.

Symptoms of Failure

• Delayed gear engagement or clutch shudder – Worn friction material on the outer clutch disk causes hesitation when shifting, often accompanied by vibration during takeoff.
• Transmission overheating – A glazed or burnt outer disk generates excessive heat, leading to fluid breakdown and potential damage to the 4143301025: HOUSING.
• Loss of torque under load – Slipping occurs when the disk can no longer grip, resulting in reduced power transfer during uphill or heavy-load operations.
• Metallic debris in transmission fluid – Worn steel backing plates or friction material shed particles that can clog the 0634313603: O-RING seals.

Technical Specifications

Compatibility

This outer clutch disk is specifically designed for ZF HL 100 and HL 270 series transmissions. It is also compatible with WG180 and WG200 models that share the same clutch pack architecture. The disk works in conjunction with the 4475280018: SCREW PLUG to secure the clutch housing assembly. For optimal performance, always replace the 0634313591: O-RING and 0501342341: SUPPORT RING during clutch disk replacement to prevent fluid leaks and maintain proper stack height.

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