ZF 4644.252.019 SPUR GEAR for WG200 | OEM Genuine Part

Overview

The ZF 4644.252.019 SPUR GEAR is a critical power transmission component engineered specifically for the WG 200 Series transmission family. This OEM genuine part sits within the planetary gear set assembly, where it precisely transfers rotational torque from the input shaft to the intermediate shaft, ensuring smooth gear engagement and consistent power flow under heavy-duty industrial loads. The SKU 4644.252.019 is manufactured to ZF’s exacting tolerances, guaranteeing a direct replacement that maintains original equipment performance. When installed alongside the 4644101249 TRANSMISSION HOUSING and 4644301402 TRANSMISSION HOUSING, this spur gear forms the core of the gear train, enabling reliable operation in demanding applications such as construction machinery and agricultural vehicles.

Symptoms of Failure

When the ZF 4644.252.019 spur gear begins to wear, operators may notice distinct failure indicators. Gear whining or grinding noise during acceleration is a common early symptom, often caused by pitting or chipping on the gear teeth. Intermittent gear slipping under load occurs when tooth profiles become worn, reducing contact area and torque capacity. Metallic debris in the transmission oil filter signals advanced wear, as particles from the spur gear contaminate the lubrication system. Vibration through the driveline during steady-state operation indicates uneven tooth wear or misalignment, which can accelerate damage to adjacent components like the 4644301298 COVER PLATE and 0634306323 O-RING.

Technical Specifications

Compatibility

This spur gear is designed for the ZF WG 200 Series transmissions, including models WG200, WG180, and WG210. It is also compatible with select variants of the WG 150 Series where the gear train architecture matches. The 4644.252.019 is frequently used in ZF’s off-highway transmissions for wheel loaders, dump trucks, and forklifts. For proper installation, ensure the transmission housing is free of wear by inspecting the 4644101249 TRANSMISSION HOUSING and 4644301402 TRANSMISSION HOUSING for cracks or distortion. Always replace the 0634306323 O-RING during reassembly to prevent oil leaks.

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