ZF 4143.251.002 INNER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.251.002 INNER 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 transmits torque between rotating elements under hydraulic pressure. Designed to withstand high thermal loads and repetitive engagement cycles, the SKU 4143.251.002 ensures precise power transfer and smooth gear changes in heavy-duty industrial applications. When paired with the 4143101009: HOUSING and the 4143301025: HOUSING, this disk maintains proper alignment within the clutch drum assembly.

Symptoms of Failure

• Erratic gear engagement or slipping under load — Worn friction material on the inner clutch disk reduces clamping force, causing the transmission to slip during acceleration or uphill operation.
• Delayed or harsh shifting — As the disk loses its friction coefficient, hydraulic pressure struggles to lock the clutch pack, resulting in noticeable shift lag or jarring engagement.
• Burnt transmission fluid odor — Excessive heat generated by a glazed or worn disk degrades the fluid, producing a distinct burnt smell and darkening the oil.
• Metallic debris in the oil pan — Advanced wear sheds friction material particles, which circulate through the system and can clog the valve body or damage the 0634313603: O-RING seals.

Technical Specifications

Compatibility

This inner clutch disk is primarily designed for ZF HL 100 and HL 270 series transmissions, which are commonly found in forklifts, wheel loaders, and industrial vehicles. It also fits select models within the WG180 and WG200 families when used in conjunction with the correct 4475280018: SCREW PLUG for pressure port sealing. Always verify your transmission model code before installation.

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