ZF 4646.337.005 SPUR GEAR for WG200 | OEM Genuine Part

Overview

The ZF 4646.337.005 SPUR GEAR is a critical power transmission component engineered specifically for the WG 200 series of off-highway transmissions. This OEM genuine part functions as a direct-drive gear within the planetary gearset, transferring torque from the input shaft to the output shaft with minimal energy loss. The spur gear’s precision-cut teeth engage with mating gears to maintain consistent rotational speed and load distribution under high-stress operating conditions. As a factory-sourced component, the SKU 4646.337.005 ensures exact fitment and metallurgical integrity, preventing premature wear in heavy-duty applications such as construction loaders and agricultural tractors. This gear is typically housed within the main transmission casing, where it interfaces with the 4644101164 TRANSMISSION HOUSING and the 4644301371 TRANSMISSION HOUSING to form a sealed, lubricated assembly.

Symptoms of Failure

When the ZF 4646.337.005 spur gear begins to degrade, operators may notice distinct performance issues. Whining or grinding noise during gear engagement is a primary indicator, often caused by pitting or chipping on the gear teeth surfaces. Intermittent power loss under load occurs when worn teeth fail to maintain proper mesh, leading to slippage within the planetary set. Metallic debris in the transmission fluid is a clear sign of material fatigue, as fragments from the spur gear contaminate the oil system. Additionally, erratic shifting or delayed engagement can result from increased backlash between the spur gear and its mating components, compromising shift timing in the WG200 series.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 200 transmission series, including models such as WG200, WG210, and WG220. It is also compatible with the WG180 series in certain configurations, though verification of tooth count and shaft spline is recommended. The gear integrates with the 0730365067 TYPE PLATE for identification and the 0631311009 GROOVED STUD for secure mounting within the housing. For complete assembly, it works alongside cover plates such as 4644303060, 4644201011, 4644201010, and 4644301372, which seal the gear cavity and maintain oil pressure.

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