Overview
The ZF 4644.351.096 SPUR GEAR is a critical power transmission component engineered for the WG 201 series of industrial transmissions. This OEM genuine part, identified by SKU 4644.351.096, directly engages with the countershaft to transfer torque from the input to the output shaft, ensuring precise gear synchronization under heavy loads. Located within the main gear train assembly, this spur gear operates in conjunction with the TRANSMISSION HOUSING (4644101172) and the TRANSMISSION HOUSING (4644301390) to maintain structural alignment and reduce vibration during operation.
Symptoms of Failure
- Audible gear whine or grinding noise during acceleration: Worn or chipped teeth on the spur gear produce a distinct high-pitched whine, often mistaken for bearing failure, which intensifies under load.
- Intermittent gear slipping or loss of power transfer: As the gear profile degrades, the transmission may momentarily lose engagement, causing sudden RPM spikes without corresponding vehicle speed increase.
- Metallic debris in transmission fluid: Flaking or pitting of the gear surface contaminates the oil, visible as glitter-like particles during routine fluid changes, often requiring replacement of the O-RING (0634306198) and SEALING RING (0634801098).
- Hard shifting or delayed engagement: Excessive backlash from a worn spur gear prevents smooth synchronization, causing harsh engagement between forward and reverse gears.
Technical Specifications
| Part Number | 4644.351.096 |
| Gear Type | Spur Gear, Helical Cut |
| Material | Case-Hardened Alloy Steel (20MnCr5 equivalent) |
| Outside Diameter | 142.0 mm |
| Face Width | 32.5 mm |
| Bore Diameter | 45.0 mm |
| Number of Teeth | 38 |
| Weight | 1.85 kg |
| OEM Reference | ZF 4644.351.096 |
Compatibility
This spur gear is primarily designed for the ZF WG 201 series transmissions, commonly found in mid-range construction and agricultural machinery. It is also compatible with the WG 180 and WG 200 series models where the same gear train architecture is employed. The part integrates directly with the THREADED BUSH (4644301189) for shaft retention and the SCREW PLUG (0636302005) for housing sealing. Always verify the transmission serial number against ZF’s technical documentation before installation, as minor variations exist between early and late production runs of the WG200 family.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101172 | TRANSMISSION HOUSING | Encloses and supports gear train assembly |
| 4644301390 | TRANSMISSION HOUSING | Secondary housing for auxiliary gear sets |
| 4644301189 | THREADED BUSH | Provides wear-resistant thread for shaft retention |
| 0636302005 | SCREW PLUG | Seals oil passages in the housing |
| 0634306198 | O-RING | Prevents fluid leaks between mating surfaces |
| 0634801098 | SEALING RING | Static seal for cover plate joints |
| 0730365067 | TYPE PLATE | Identification plate with transmission specs |
| 0631311009 | GROOVED STUD | Alignment dowel for housing positioning |
| 4644301161 | COVER PLATE | Access cover for gear inspection |
| 0636100621 | HEXAGON SCREW | Fastener for securing cover plates |
ZF 4644.351.096 SPUR GEAR – Gear RFQ Support
Use ZF 4644.351.096 SPUR GEAR as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 4644.351.096 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: COUPLING
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4644.351.096 |
|---|---|
| Normalized SKU | 4644351096 |
| Part name | SPUR GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: diagram. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
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- ZF 2094.306.024 GEAR SHIFT RAIL
- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
