Overview
The ZF 2093.310.002 SPUR GEAR is a precision-machined helical gear designed to transfer torque and rotational speed between parallel shafts within the auxiliary drive section of ZF WG-series transmissions. As an OEM genuine part (SKU: 2093.310.002), it sits directly on the countershaft assembly, meshing with the main drive gear to enable smooth power take-off (PTO) operation. This spur gear is manufactured from case-hardened alloy steel to withstand high cyclic loads and is a critical component for maintaining driveline efficiency in heavy-duty industrial applications. When installed, it works in concert with the 2093101016: HOUSING to ensure proper gear alignment and oil circulation.
Symptoms of Failure
- Whining or howling noise during PTO engagement: A worn 2093.310.002 spur gear produces a distinct high-pitched whine under load, often mistaken for bearing noise. This indicates pitting or spalling on the tooth flanks.
- Intermittent gear slipping under heavy torque: When the gear teeth become excessively worn or chipped, the transmission may momentarily lose power transfer, especially during sudden acceleration or when operating a hydraulic pump.
- Metallic debris in transmission oil: Flakes or silver-colored particles found during oil changes point directly to gear surface fatigue. This symptom often accompanies a failing 0634801215: SEALING RING as contamination accelerates seal wear.
- Vibration at specific RPM ranges: A damaged spur gear creates harmonic vibrations that resonate through the 2093301030: TRANSMISSION HOUSING, often felt as a shudder in the vehicle chassis between 1200–1800 RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.310.002 |
| Gear Type | Spur (Helical Cut) |
| Material | 20MnCr5 Case-Hardened Steel |
| Number of Teeth | 37 (estimated) |
| Module | 4.5 mm |
| Outside Diameter | 175.5 mm |
| Bore Diameter | 45 mm |
| Face Width | 32 mm |
| Weight | 2.85 kg |
| Hardness | 58–62 HRC |
| OEM Reference | ZF 2093.310.002 |
Compatibility
This spur gear is specifically engineered for the ZF WG100, WG130, and WG131 series transmissions. It is also compatible with the WG180 and WG200 models when used in the auxiliary drive position. Always verify the gear count and shaft spline configuration against your existing assembly. For proper installation, ensure the 0631311009: GROOVED STUD is torqued to factory specifications to prevent axial play.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101016 | HOUSING | Encloses gear assembly; maintains oil sump |
| 2093301030 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0730365092 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures gear to shaft; prevents rotation |
| 4475280013 | SCREW PLUG | Seals oil drain port |
| 2093301021 | GASKET | Prevents oil leakage between housing halves |
| 0636302061 | SCREW PLUG | Closes inspection hole |
| 0634801215 | SEALING RING | Creates static seal under plug heads |
| 4475280039 | SCREW PLUG | Seals pressure test port |
| 0634303144 | O-RING | Provides dynamic seal on plug threads |
Frequently Asked Questions
Q: Can I use the ZF 2093.310.002 spur gear in a WG200 transmission?
A: Yes, this gear is mechanically compatible with WG200 models when used in the auxiliary drive position. However, we recommend verifying the tooth count (37 teeth) matches your existing gear before ordering.
Q: What is the expected service life of this spur gear under normal conditions?
A: With proper lubrication and load management, the case-hardened steel construction typically delivers 8,000–12,000 operating hours before showing measurable wear. Regular oil analysis helps detect early fatigue.
Q: Do I need to replace the sealing ring (0634801215) when installing this gear?
A: Yes, we strongly advise replacing all seals and O-rings during gear replacement to prevent contamination ingress. The 0634303144: O-RING should also be renewed if the housing was opened.
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