ZF 4651.351.016 SPUR GEAR for WG100 | OEM Genuine Part

Overview

The ZF 4651.351.016 SPUR GEAR is a critical power transmission component engineered specifically for the WG 100 Series transmission family. This OEM genuine part, identified by SKU 4651.351.016, functions as a precision-machined gear that transfers rotational torque between parallel shafts within the gear train assembly. It sits directly within the intermediate shaft cluster, where it meshes with adjacent gears to maintain correct gear ratios and smooth power flow. The spur gear’s straight-cut teeth design ensures high efficiency and minimal axial thrust, making it essential for consistent performance in heavy-duty industrial applications.

Symptoms of Failure

When the ZF 4651.351.016 spur gear begins to wear, operators often notice distinct operational issues. Whining or grinding noises during gear engagement are common early indicators, as worn tooth profiles create uneven contact patterns. Intermittent gear slipping under load occurs when the gear’s teeth lose their hardened surface, reducing torque capacity. Metallic debris in the transmission oil filter is a clear sign of spalling or pitting on the gear flanks. Finally, vibration through the shift lever or chassis can develop when the gear’s balance is compromised by uneven wear.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 100 Series transmission models, including the WG100, WG120, and WG150 variants. It is also compatible with certain WG180 and WG200 configurations that share the same intermediate shaft geometry. The gear interfaces directly with the 4651101009: TRANSMISSION HOUSING, which provides the precise bearing bores and alignment features. For proper sealing, the 0634303928: O-RING must be installed between the gear hub and the shaft. Additionally, the 4651301025: HOUSING and 4651301031: HOUSING components enclose the gear cluster and maintain proper lubricant distribution.

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