ZF 4143.351.079 OUTER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.351.079 Outer Clutch Disk is a critical friction component engineered for the HL 100 and HL 270 series transmissions. Positioned within the clutch pack assembly, this OEM genuine part transfers torque from the driving hub to the housing, enabling smooth gear engagement and disengagement. The SKU 4143.351.079 is precision-machined to withstand high thermal loads and repetitive stress, ensuring consistent performance in heavy-duty industrial applications. It works in concert with the 4143101025 HOUSING and the 4143301055 HOUSING to maintain proper alignment and oil flow within the clutch drum.

Symptoms of Failure

• Delayed or harsh gear engagement: When the outer clutch disk wears thin, hydraulic pressure cannot clamp the pack effectively, causing hesitation or jerky shifts during acceleration.
• Transmission oil overheating: A glazed or warped disk increases friction-generated heat, leading to elevated oil temperatures and potential thermal degradation of seals.
• Intermittent gear slipping under load: Worn friction material reduces torque capacity, resulting in momentary loss of drive power, especially when climbing or hauling heavy loads.
• Metallic debris in oil pan: As the disk material erodes, fine particles contaminate the hydraulic fluid, accelerating wear on the 0631329135 SPRING PIN and other valve components.

Technical Specifications

Compatibility

This outer clutch disk is designed for ZF HL 100 and HL 270 series transmissions, commonly found in forklifts, wheel loaders, and agricultural machinery. It is also compatible with ZF WG180, WG200, and WG210 models that share the same clutch pack architecture. For proper installation, ensure the 4143298040 CASE is free of scoring and that the housing bores are clean. Always replace the friction disks in sets to maintain balanced clamping force.

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