Overview
This genuine ZF 4657.304.009 OUTPUT GEAR is a critical component within the WG190 and WG210 transmission series. It serves as the final drive gear, transferring rotational power from the planetary gear set to the output shaft and ultimately to the vehicle’s driveline. Positioned at the rear of the main transmission housing, this gear must withstand high torque loads and continuous meshing forces. The SKU 4657.304.009 is an OEM-sourced part, ensuring exact fitment and material integrity for demanding industrial applications.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn gear teeth create excessive backlash, producing a distinct high-pitched sound under load.
- Vibration in the driveline: A damaged output gear can cause uneven rotation, leading to noticeable shuddering through the chassis.
- Metal particles in transmission fluid: Flaking or pitting on the gear surface sheds debris, which can clog filters and damage downstream components.
- Intermittent gear slipping or loss of power: Severe wear reduces tooth engagement, causing momentary disengagement under heavy torque.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.304.009 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outside Diameter | ~145 mm |
| Tooth Count | 39 teeth (helical) |
| Weight | ~2.8 kg |
| OEM Reference | ZF 4657.304.009 |
| Heat Treatment | Carburized & tempered (HRC 58-62) |
Compatibility
This output gear is engineered for the ZF WG190 and WG210 series transmissions. It may also be compatible with the WG180, WG200, and select WG150 variants that share the same output shaft spline and gear ratio. Always verify the tooth profile and spline dimensions against your existing assembly before installation.
When replacing the output gear, it is strongly recommended to inspect the 4657101039: TRANSMISSION HOUSING for cracks or wear. The 4657201028: HOUS.FRONT SECT and 4657201013: HOUSING REAR PART must be aligned precisely to avoid gear binding. Additionally, the 0631306792: CYLINDRICAL PIN should be replaced to maintain correct dowel alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing that encloses all gear sets |
| 4657201028 | HOUS.FRONT SECT | Forward section of the housing, supports input shaft bearings |
| 4657201013 | HOUSING REAR PART | Rear housing section that contains the output gear cavity |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retains output gear axial position |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Secondary filter screen for high-pressure oil |
| 0636100803 | CAP SCREW | Bolt for output bearing retainer |
| 4681301040 | OIL FEED.HOUSG. | Lubrication channel for output gear bearings |
Frequently Asked Questions
Q: Can I reuse the old output gear if it shows only minor pitting?
No. Even minor surface pitting accelerates wear on the mating ring gear and can introduce metal debris into the transmission. Always replace with a genuine 4657.304.009 gear.
Q: Does this gear require a specific break-in procedure?
Yes. After installation, run the transmission at low load for 30 minutes, then change the oil and filter to remove any initial wear particles.
Q: Is the 4657.304.009 gear interchangeable with the 4657.304.008?
No. The .009 variant has a different tooth helix angle and spline count. Using the wrong part will cause gear clash and rapid failure.
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ZF 4657.304.009 OUTPUT GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4657.304.009 OUTPUT GEAR with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 4657.304.009 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657023001
- Documentation reference: 4657023004
- Documentation reference: 4657023100
- Documentation reference: 4657024158
- Illustration section: DIFFERENTIAL
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 | 4657.304.009 |
|---|---|
| Normalized SKU | 4657304009 |
| Part name | OUTPUT GEAR |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
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 4644.306.326 GEAR SHIFT HOUSING
