ZF 4642.252.005 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4642.252.005 SPUR GEAR is a precision-engineered component designed for the WG 150 series transmission, playing a critical role in torque transfer and gear synchronization within the planetary gear set. This OEM genuine part ensures optimal power flow from the input shaft to the output assembly, directly influencing shift quality and load-bearing capacity. The SKU 4642.252.005 is manufactured to ZF’s exacting tolerances, featuring hardened tooth profiles that resist pitting and wear under high-stress industrial applications. When installed alongside the 4642101108: TRANSMISSION HOUSING and the 4642301208: TRANSMISSION HOUSING, this spur gear ensures proper alignment and reduced backlash, extending the service life of the entire drivetrain assembly.

Symptoms of Failure

When the ZF 4642.252.005 spur gear begins to wear, operators may notice distinct operational issues. Whining or grinding noises during gear engagement are common early indicators, often caused by tooth surface degradation or spalling. Another frequent symptom is intermittent power loss under load, where the transmission struggles to maintain torque during heavy hauling or incline operations. Metal particles in the transmission fluid—visible during routine oil changes—signal advanced wear of the gear teeth. Finally, erratic shifting or delayed engagement can occur as the worn gear disrupts the synchronization between planetary carriers, requiring immediate inspection of the 0730365125: TYPE PLATE for correct part identification before replacement.

Technical Specifications

Compatibility

This spur gear is specifically engineered for the ZF WG 150 series, but its design parameters also support the WG 180 and WG 200 models due to shared planetary gear architecture. It is compatible with transmissions using the 0631311009: GROOVED STUD for secure mounting within the housing. For optimal performance, verify the gear’s tooth profile matches the output shaft spline count in your specific unit. The part is not recommended for WG 120 or WG 250 series without consulting a ZF service manual, as torque ratings differ significantly.

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