ZF 4646.337.019 GEAR for WG250 | OEM Genuine Part

Overview

The ZF 4646.337.019 GEAR is a precision-engineered helical gear designed for the WG250 series of industrial transmissions. This OEM genuine part functions as a critical power transfer component within the intermediate shaft assembly, converting rotational torque from the input shaft to the output shaft with minimal energy loss. The gear’s tooth profile is optimized for high-load applications, ensuring smooth engagement under constant stress. The SKU 4646.337.019 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty machinery. When installed, this gear meshes with adjacent components such as the TRANSMISSION HOUSING and the HOUSING, which provide structural support and alignment. The gear’s surface-hardened steel construction resists pitting and wear, extending service intervals in demanding environments like mining or construction equipment.

Symptoms of Failure

• Whining or grinding noise during gear engagement: As the 4646.337.019 gear teeth wear down, they produce a high-pitched whine under load, often mistaken for bearing failure. This noise intensifies during acceleration or deceleration.
• Intermittent gear slipping under torque: Worn tooth profiles cause the gear to lose positive engagement, leading to sudden slippage when the transmission is under heavy load. Operators may notice a momentary loss of drive power.
• Metallic debris in transmission oil: Flaking or chipping of the gear surface introduces fine metal particles into the lubricant. This contamination accelerates wear on the COVER and other internal parts.
• Vibration through the shift lever: Uneven gear wear creates rotational imbalance, transmitting vibration through the driveline. This symptom is especially noticeable at specific RPM ranges.

Technical Specifications

Compatibility

This gear is specifically designed for the ZF WG250 transmission series. Based on its tooth count and module, it also fits the WG180 and WG200 models when used in the intermediate shaft position. The 4646.337.019 gear is not compatible with the WG120 or WG300 series due to differing shaft diameters and center distances. For proper installation, ensure the CONNECTING PART is inspected for wear, as it secures the gear to the shaft. Always replace the gear in matched sets with the corresponding countershaft gear to prevent uneven wear.

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