ZF 4699.801.191 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.191 GK10 is a precision-engineered gear set component designed for the upper power take-off (PTO) drive train in heavy-duty construction machinery transmissions. This OEM genuine part, identified by SKU 4699.801.191, sits directly within the transmission housing and interfaces with the input shaft to transfer rotational force to the hydraulic pump drive. It is a critical wear item in ZF’s GK10 series, ensuring consistent torque delivery under high-load conditions. When replacing this unit, it is common to also inspect the 4699001070: GK10 assembly for matched wear patterns.

Symptoms of Failure

When the 4699.801.191 gear begins to degrade, operators typically notice these specific failure indicators:

• Intermittent gear slipping under load – A sudden loss of power to the hydraulic pump during digging or lifting operations, often accompanied by a grinding noise from the transmission housing.
• Metallic debris in transmission oil – Fine steel particles found during routine oil changes, indicating tooth surface spalling on the GK10 gear set.
• Oil seepage around the PTO cover – Worn gear bearings can cause shaft misalignment, leading to seal failure and visible leaks near the 4699101079: HOUSING interface.
• Vibration at idle or low RPM – Uneven gear tooth contact creates harmonic vibrations that resonate through the chassis, particularly when the transmission is in neutral.

Technical Specifications

Compatibility

This gear set is specifically engineered for ZF’s WG180 and WG200 series power shift transmissions commonly used in wheel loaders, excavators, and telehandlers. It also fits select variants of the WG150 and WG250 series where the GK10 PTO module is installed. For proper installation, ensure the 4699102158: INPUT shaft splines are free of galling, and verify that the 4699103064: OUTPUT flange is torqued to factory specifications. Always replace the associated seals and bearings when servicing this component.

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