ZF 4699.823.032 GP21 | OEM Genuine Part

Overview

The ZF 4699.823.032 GP21 is a precision-engineered OEM genuine part designed for the high-torque planetary gear sets within ZF heavy-duty construction machinery transmissions. This component functions as a critical interface element, ensuring smooth power distribution from the input shaft to the planetary stages. The SKU 4699.823.032 is specifically manufactured to ZF’s original tolerances, guaranteeing exact fitment and load-bearing capacity. It sits directly within the main gear train assembly, working in conjunction with the 4699100024 BASIC PARTS kit to maintain proper gear mesh and hydraulic pressure balance.

Symptoms of Failure

When the ZF 4699.823.032 GP21 begins to degrade, operators often notice intermittent gear slipping under heavy load, particularly during uphill travel or when engaging the PTO. A second common failure symptom is metallic grinding noises from the transmission housing, indicating surface wear on the engagement splines. Third, erratic shift timing or delayed engagement in forward gears can occur as the part loses its dimensional stability. Finally, visible metal particles in the transmission fluid filter are a clear indicator that this component requires immediate replacement to prevent cascading damage to the 4699300138 HOUSING assembly.

Technical Specifications

Compatibility

This GP21 component is primarily compatible with ZF WG180, WG200, and WG210 series transmissions used in wheel loaders, graders, and excavators. It also fits select models of the ZF 4WG-200 and 6WG-250 power shift transmissions. For proper installation, ensure the 4699300155 WHEEL SHAFT is inspected for wear, and the 4699300127 PLANET CARRIER is aligned within factory torque specifications. Always replace the GP21 in pairs when servicing dual-planetary configurations.

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