Overview
The ZF 4644.303.119 SPUR GEAR is a critical power transmission component engineered specifically for the WG 181 series. This OEM genuine part resides within the planetary gearset assembly, where it directly engages with adjacent pinions to transfer torque from the input shaft to the output shaft. The spur gear’s precision-cut teeth ensure smooth, high-efficiency power flow under heavy-duty industrial loads. The SKU 4644.303.119 is manufactured to ZF’s original tolerances, guaranteeing exact fitment and durability within the transmission housing. When installed alongside the 4644101047: TRANSMISSION HOUSING, this gear maintains proper shaft alignment and load distribution, preventing premature wear on surrounding components.
Symptoms of Failure
- Whining or grinding noise during gear engagement: Worn spur gear teeth create audible metallic sounds, especially under load, indicating surface fatigue or pitting.
- Intermittent power loss or gear slipping: As the 4644.303.119 loses tooth profile integrity, the transmission may fail to maintain consistent torque transfer, causing sudden RPM surges.
- Metallic debris in transmission fluid: Flaking or chipped gear teeth contaminate the oil, often visible during routine drain inspections, signaling advanced wear.
- Vibration through the driveline: Uneven tooth wear leads to rotational imbalance, transmitting harsh vibrations to the 4644301380: HOUSING and connected shafts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.303.119 |
| Gear Type | Spur Gear, Helical Cut |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Outside Diameter | 112.5 mm |
| Number of Teeth | 34 |
| Module | 3.0 |
| Weight | 0.85 kg |
| OEM Reference | ZF 4644.303.119 |
| Hardness | 58-62 HRC |
Compatibility
This spur gear is designed primarily for the ZF WG 181 series transmissions. It is also compatible with the WG 180, WG 182, and WG 200 series models that share the same planetary gearset architecture. The 4644.303.119 interfaces directly with the 4644301189: THREADED BUSH for axial retention and requires proper alignment with the 0730365067: TYPE PLATE for correct assembly identification. Always verify your transmission’s serial number against ZF’s parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101047 | TRANSMISSION HOUSING | Encloses and supports gear train assembly |
| 4644301380 | HOUSING | Secondary casing for bearing and shaft retention |
| 4644301189 | THREADED BUSH | Provides threaded anchor for gear retention bolts |
| 0730365067 | TYPE PLATE | Identification tag for transmission model and specs |
| 0631311009 | GROOVED STUD | Locating pin for precise gear alignment |
| 4644301161 | COVER PLATE | Seals gear cavity to prevent contamination |
| 0636100621 | HEXAGON SCREW | Fastener for securing cover plate and housing |
| 0631610020 | SET SCREW | Locks threaded bush in position |
| 0634801098 | SEALING RING | Prevents oil leakage at shaft interfaces |
| 4644301117 | FIXING PLATE | Anchors gear assembly to prevent axial movement |
ZF 4644.303.119 SPUR GEAR – Gear RFQ Support
ZF 4644.303.119 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 4644.303.119 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: SPUR GEAR DRIVE
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 | 4644.303.119 |
|---|---|
| Normalized SKU | 4644303119 |
| 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.
Related Parts
- ZF 4661.302.010 GEAR
- 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
