Overview
The ZF 4642.351.032 SPUR GEAR is a critical power transmission component engineered specifically for the WG 150 series. 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 shaft cluster, the 4642.351.032 spur gear ensures synchronized rotation and load distribution across the transmission’s internal gear train. Precision-ground teeth and case-hardened metallurgy guarantee long service life under high-torque industrial applications. When paired with a robust 4642101047: TRANSMISSION HOUSING, this gear maintains exacting alignment to prevent premature wear.
Symptoms of Failure
- Audible gear whine or grinding during acceleration: Worn tooth profiles on the 4642.351.032 create uneven contact patterns, producing a high-pitched noise that intensifies under load.
- Intermittent power loss under heavy torque: Damaged spur gear teeth can skip or slip, causing momentary disengagement between the input and output shafts.
- Metallic debris in transmission fluid: Flaking or pitting of the gear surface introduces ferrous particles into the oil, often visible during routine drain intervals.
- Vibration at specific RPM ranges: Imbalanced gear rotation from tooth wear transmits harmonic vibrations through the 4642301207: TRANSMISSION HOUSING, felt as a rhythmic shudder.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4642.351.032 |
| Gear Type | Spur Gear, Straight Cut |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Outside Diameter | 142.5 mm |
| Face Width | 38.0 mm |
| Bore Diameter | 45.0 mm |
| Number of Teeth | 32 |
| Module | 4.0 |
| Weight | 1.85 kg |
| OEM Reference | ZF 4642.351.032 |
| Hardness | 58-62 HRC |
Compatibility
This ZF 4642.351.032 spur gear is designed for the WG 150 transmission series, but its tooth geometry and shaft interface also support select models in the WG 180 and WG 200 families when used with the correct 0631311009: GROOVED STUD for axial retention. It is directly compatible with WG 150, WG 150-2, and WG 150-3 variants. For WG 180 and WG 200 applications, verify the bore diameter matches your output shaft; a 0730365067: TYPE PLATE on the transmission housing will confirm the exact series designation. Always inspect the mating gear set for wear before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Encloses and aligns the gear train |
| 4642301207 | TRANSMISSION HOUSING | Secondary housing for auxiliary gear sets |
| 0730365067 | TYPE PLATE | Identifies transmission model and specs |
| 0631311009 | GROOVED STUD | Secures gear axial position on shaft |
| 4642301168 | SCREEN SHEET | Filters debris from lubricating oil |
| 4642301169 | SCREEN SHEET | Fine-mesh oil filtration element |
| 0636100621 | HEXAGON SCREW | Fastens housing and cover components |
| 4642301186 | SCREEN SHEET | High-flow oil strainer for sump |
| 4644106300 | SHIFT SYSTEM | Controls gear engagement and selection |
| 4644306500 | COVER PLATE | Seals transmission access opening |
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