Overview
The ZF 4616.308.185 SPUR GEAR is a critical power transmission component engineered specifically for the WG 65 series transmission family. This OEM genuine part sits within the planetary gear set assembly, where it transfers rotational torque from the input shaft to the output shaft with minimal energy loss. The spur gear’s precision-ground teeth ensure smooth meshing with adjacent gears, reducing vibration and noise during operation. As part number 4616.308.185, this component is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in heavy-duty industrial applications. When installed alongside the 4616105413: OUTPUT and 4616203017: OUTPUT FLANGE, this spur gear forms the backbone of the WG65’s drivetrain.
Symptoms of Failure
When the ZF 4616.308.185 spur gear wears out, operators typically notice these specific failure indicators:
- Audible gear whine or grinding noise during acceleration or deceleration, indicating tooth surface pitting or chipping.
- Intermittent power loss or hesitation when shifting between forward and reverse gears, caused by worn tooth profiles failing to engage properly.
- Metallic debris in transmission oil during routine fluid changes, a clear sign of spur gear material fatigue or fracture.
- Vibration through the driveline at specific RPM ranges, often accompanied by increased operating temperatures due to friction from damaged gear teeth.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.308.185 |
| Gear Type | Spur Gear, Helical Cut |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Outside Diameter | 185 mm |
| Face Width | 38 mm |
| Module | 4.5 |
| Number of Teeth | 41 |
| Weight | 2.8 kg |
| OEM Reference | ZF 4616.308.185 |
| Hardness | 58-62 HRC |
Compatibility
This spur gear is designed for the ZF WG 65 series transmission, which includes models such as WG65, WG65-1, and WG65-2. It is also compatible with the WG180, WG200, and WG250 series when used in specific planetary gear configurations. The gear interfaces directly with the 4616101117: TRANSMISSION HOUSING and is secured using 0636011038: HEXAGON SCREW fasteners. For optimal performance, always pair this spur gear with the corresponding output shaft and flange assemblies from the same WG65 family.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from gear set to output flange |
| 4616203017 | OUTPUT FLANGE | Connects transmission to driveshaft |
| 4616101117 | TRANSMISSION HOUSING | Encloses and supports gear assembly |
| 0636011038 | HEXAGON SCREW | Secures housing and gear components |
| 0636016015 | HEXAGON SCREW | Fastens output flange to shaft |
| 0631306085 | CYLINDRICAL PIN | Aligns gear and housing during assembly |
| 0634313118 | O-RING | Seals housing joint against oil leaks |
| 0732611049 | FILTER INSERT | Removes debris from transmission fluid |
| 0634303718 | O-RING | Seals output flange connection |
| 0636610082 | STUD | Provides threaded mounting for housing bolts |
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