Overview
The ZF 4646.252.049 SPUR GEAR is a precision-machined drive component engineered specifically for the WG 250 series transmission. This OEM genuine part functions as a critical power transfer element within the planetary gear set, ensuring smooth torque distribution and rotational synchronization between the input shaft and the intermediate assembly. The SKU 4646.252.049 is manufactured to exact ZF tolerances, providing reliable meshing with adjacent gears under high-load conditions. When installed correctly, this spur gear maintains the correct gear ratio and reduces vibration, directly supporting the durability of the TRANSMISSION HOUSING and the HOUSING assembly.
Symptoms of Failure
- Whining or grinding noise during gear engagement: Worn tooth profiles on the spur gear produce a distinct high-pitched whine, especially under load, indicating surface fatigue or pitting.
- Intermittent gear slipping or loss of drive: As the gear teeth wear unevenly, the transmission may momentarily lose torque transfer, causing hesitation or slipping during acceleration.
- Metallic debris in transmission oil: Flaking or chipped gear teeth shed fine metallic particles into the lubricant, often visible during oil changes or when inspecting the COVER drain plug.
- Increased operating temperature: Excessive friction from a damaged spur gear generates localized heat, which can be detected through elevated oil temperatures or thermal discoloration near the CONNECTING PART interface.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4646.252.049 |
| Gear Type | Spur Gear (Straight Cut) |
| Module | 4.5 mm (estimated) |
| Number of Teeth | 28 (estimated) |
| Outside Diameter | 135 mm (estimated) |
| Bore Diameter | 45 mm (estimated) |
| Face Width | 32 mm (estimated) |
| Material | Case-Hardened Alloy Steel (20MnCr5 equivalent) |
| Surface Hardness | 58-62 HRC |
| Weight | 1.85 kg (estimated) |
| OEM Reference | ZF 4646.252.049 |
Compatibility
This spur gear is a direct-fit component for the ZF WG 250 series transmission. Based on its design and tooth geometry, it is also compatible with the following ZF models that share the same gear train architecture: WG 180, WG 200, WG 220, and WG 250. Always verify the gear count and shaft spline configuration against your specific transmission serial number before installation. The part interfaces directly with the TRANSMISSION HOUSING and the HOUSING to maintain proper alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101062 | TRANSMISSION HOUSING | Encloses and supports the gear train assembly |
| 4646301104 | HOUSING | Secondary housing component for bearing support |
| 4646301300 | COVER | Seals the housing and retains lubricant |
| 4646323018 | CONNECTING PART | Links gear shafts to the output flange |
| 0636015304 | HEXAGON SCREW | Fastens housing sections together |
| 0636101828 | CAP SCREW | Secures cover plates to the housing |
| 4646301100 | COVER SHEET | Thin protective shield for internal components |
| 4646301112 | COVER SHEET | Alternate cover sheet for different housing variants |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment pin for precise gear positioning |
ZF 4646.252.049 SPUR GEAR – Gear RFQ Support
ZF 4646.252.049 SPUR GEAR is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 4646.252.049 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 | 4646.252.049 |
|---|---|
| Normalized SKU | 4646252049 |
| 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: fallback. 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.
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- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
