ZF 4642.308.516 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4642.308.516 SPUR GEAR is a critical power transmission component engineered specifically for the WG150 series transmission. This OEM genuine part functions as a direct-drive gear within the planetary gearset, transferring torque from the input shaft to the output assembly with minimal energy loss. Positioned in the intermediate gear train, the 4642.308.516 spur gear ensures synchronized rotation and load distribution across multiple pinions. As a genuine ZF part, it meets exacting tolerances for tooth profile and surface hardness, making it essential for maintaining factory-specified performance in heavy-duty industrial applications.

Symptoms of Failure

• Whining or grinding noise during gear engagement: When the 4642.308.516 spur gear teeth become pitted or worn, operators often report a high-pitched whine or metallic grinding sound, particularly under load or during acceleration.
• Vibration in the driveline at specific RPM ranges: A worn spur gear can cause harmonic vibrations that are most noticeable between 1,200 and 1,800 RPM, indicating uneven tooth contact or backlash issues.
• Intermittent power loss or gear slippage: As tooth profiles degrade, the gear may fail to maintain positive engagement, leading to momentary loss of torque transfer under heavy load conditions.
• Metallic debris in transmission fluid: Advanced wear of the spur gear produces fine metallic particles that contaminate the oil, often visible during routine fluid changes or when inspecting the SCREEN SHEET (4642301168).

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG150 series transmission, but it also shares dimensional compatibility with several other ZF industrial gearboxes. The 4642.308.516 is directly interchangeable with units in the WG180 and WG200 series when used in the intermediate gear stage. For proper installation, ensure the TRANSMISSION HOUSING (4642101109) is free of cracks or wear at the bearing journals. Additionally, the TRANSMISSION HOUSING (4642301205) variant used in later WG150 models requires the same gear geometry. Always verify the TYPE PLATE (0730365125) on your transmission to confirm the exact series designation before ordering. The GROOVED STUD (0631311009) must be torqued to specification when securing the gear to the shaft assembly.

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