ZF 4143.351.025 OUTER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.351.025 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 elements under hydraulic pressure. The SKU 4143.351.025 acts as the outermost plate in the clutch stack, providing the necessary surface area for smooth engagement and disengagement. When paired with a matching HOUSING, this disk ensures precise alignment and consistent clamping force during high-load operations.

Symptoms of Failure

• Delayed gear engagement or slipping under load: Worn friction material on the outer clutch disk reduces bite, causing the transmission to hesitate or slip when shifting into forward or reverse.
• Burnt transmission fluid odor: Excessive heat from a glazed or worn disk degrades the fluid, producing a distinct burnt smell during operation.
• Erratic shift quality or harsh engagement: Uneven wear on the 4143.351.025 disk leads to inconsistent hydraulic pressure application, resulting in jarring or unpredictable shifts.
• Visible metal debris in the oil pan: As the friction material wears down, metallic particles from the disk backing plate contaminate the fluid, often found during routine maintenance.

Technical Specifications

Compatibility

This outer clutch disk is designed for ZF HL 100 and HL 270 series transmissions, commonly found in industrial forklifts, telehandlers, and construction machinery. It is also compatible with select WG180 and WG200 models that share the same clutch pack architecture. For proper installation, always verify the condition of the HOUSING and replace the O-RING to prevent fluid bypass. The SCREW PLUG should also be inspected for thread wear during reassembly.

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