ZF 4642.353.009 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4642.353.009 SPUR GEAR is a critical power transmission component engineered specifically for the WG 150 Series transmission. This OEM genuine part functions as a precision-machined gear that transfers rotational force between parallel shafts within the gear train, ensuring smooth torque delivery and reliable load distribution under heavy-duty industrial conditions. The SKU 4642.353.009 sits within the intermediate shaft assembly, directly meshing with adjacent gears to maintain correct gear ratios and minimize energy loss. Its robust construction is essential for maintaining drivetrain integrity in demanding applications such as construction equipment, agricultural machinery, and material handling vehicles.

Symptoms of Failure

• Whining or grinding noise during gear engagement: A worn spur gear often produces a high-pitched whine or metallic grinding sound, especially under load, indicating tooth surface degradation or pitting.
• Intermittent gear slipping or loss of power transfer: As the gear teeth wear unevenly, you may experience sudden slipping or hesitation when accelerating, leading to reduced operational efficiency.
• Metallic debris in transmission fluid: Flakes or particles found during oil changes signal advanced gear wear, often accompanied by a burnt smell from overheated lubricant.
• Vibration through the driveline: Excessive play in the gear mesh causes noticeable vibration at specific speeds, which can worsen over time and damage adjacent components.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 150 Series transmission. Based on its gear geometry and spline configuration, it is also compatible with the WG 180 and WG 200 models, which share similar internal gear train layouts. Additionally, it may be used in select WG 120 and WG 250 variants where the intermediate shaft assembly requires a 34-tooth spur gear with a 4.0 module. Always verify tooth count and shaft fitment before installation.

When replacing the 4642.353.009 spur gear, it is essential to inspect the TRANSMISSION HOUSING (4642101114) for cracks or warping, as a damaged housing can misalign the gear train. Similarly, the TRANSMISSION HOUSING (4642301213) must be checked for bearing bore wear. For accurate identification, the TYPE PLATE (0730365125) provides the exact transmission model and serial number. Secure the assembly using a GROOVED STUD (0631311009) to prevent fastener loosening under vibration.

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