ZF 4699.801.080 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.080 GK10 is a critical OEM genuine gear set assembly designed for heavy-duty construction machinery transmissions. This component, identified by SKU 4699.801.080, functions as the primary gear cluster within the transmission housing, managing torque distribution and rotational speed between the input shaft and the output shaft. Positioned directly inside the main HOUSING, the GK10 assembly ensures smooth power transfer under extreme loads, making it indispensable for wheel loaders, graders, and dump trucks operating in demanding environments. Precision-machined from case-hardened steel, this part maintains gear mesh integrity, reducing vibration and wear across the drivetrain.

Symptoms of Failure

When the ZF 4699.801.080 GK10 begins to fail, operators often notice distinct operational issues. Common failure symptoms include:

• Gear slipping under load: The transmission may unexpectedly disengage from a selected gear, especially during uphill climbs or heavy digging operations.
• Whining or grinding noises: Worn gear teeth produce a high-pitched whine or metallic grinding sound, particularly in lower gears.
• Oil contamination with metallic debris: Visible metal shavings in the transmission fluid indicate advanced gear surface fatigue.
• Hard shifting or delayed engagement: The transmission struggles to engage gears smoothly, often accompanied by a clunking sensation.

These issues frequently arise when the GK10 assembly loses tooth profile integrity, often due to inadequate lubrication or shock loading from sudden torque spikes.

Technical Specifications

Compatibility

This ZF 4699.801.080 GK10 gear set is engineered for use in several ZF transmission models commonly found in construction machinery. It is directly compatible with the ZF WG180 and ZF WG200 series transmissions, as well as the ZF 4WG-200 and ZF 6WG-200 variants. These transmissions are typically installed in equipment from manufacturers such as Caterpillar, Volvo, and Komatsu. For proper installation, ensure the HOUSING COVER is correctly aligned, and use a new SNAP RING to secure the gear cluster axially. Additionally, replace the O-RING on the housing cover to prevent fluid bypass and maintain internal pressure.

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