ZF 4699.302.074 HEXAGON NUT | OEM Genuine Part

Overview

The ZF 4699.302.074 HEXAGON NUT is a critical fastening component engineered for high-stress environments within ZF construction machinery transmissions. This OEM genuine part secures rotating assemblies and maintains precise axial clearance, preventing unwanted movement that could lead to drivetrain misalignment. The SKU 4699.302.074 is specifically designed to withstand extreme vibration and torque loads found in heavy equipment gearboxes. When installed correctly, it works in concert with the 4699101046 HOUSING and the 4699301109 HOUSING to create a sealed, stable internal environment for gear clusters.

Symptoms of Failure

• Transmission oil leaks at the housing interface: A loosened or worn hexagon nut allows the 4699301017 BEARING COVER to shift, breaking the seal and causing fluid seepage during operation.
• Audible gear rattle or clunking under load: When the nut loses its clamping force, axial play develops in the shaft assembly, producing metallic knocking sounds that worsen with acceleration.
• Premature bearing wear and overheating: Insufficient nut torque permits bearing race movement, generating excess friction and localized heat that degrades lubricant viscosity.
• Erratic gear engagement in WG series transmissions: A failing nut on the output shaft can cause intermittent slipping or delayed engagement, particularly in reverse gear operations.

Technical Specifications

Compatibility

This hexagon nut is a standard fitment across multiple ZF heavy-duty transmission platforms used in construction machinery. It is commonly specified for the WG180, WG200, and WG210 series gearboxes, where it secures the main drive shaft bearing retainer. The part also appears in select 4WG-200 and 6WG-200 variants. For proper installation, always pair this nut with a new 4699301085 COVER to ensure correct preload and sealing integrity.

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