Overview
The ZF 4657.302.012 BEARING FLANGE is a critical structural component engineered for the WG210 series transmission. This OEM genuine part serves as the mounting interface that secures the output bearing assembly within the transmission housing, ensuring precise shaft alignment and load distribution during high-torque operations. The SKU 4657.302.012 is precision-machined to maintain concentricity between rotating elements, directly influencing drivetrain stability. It integrates seamlessly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a rigid support structure for planetary gear sets.
Symptoms of Failure
When the bearing flange wears out, operators often notice oil seepage around the output shaft seal due to flange face distortion. A second common symptom is intermittent gear slipping under load, caused by bearing preload loss that allows axial shaft movement. You may also detect low-frequency humming from the transmission bell housing during deceleration, indicating uneven bearing wear. Finally, metal particles in the transmission fluid during routine oil changes point to flange surface degradation. These failure modes typically accelerate if the CYLINDRICAL PIN that indexes the flange becomes sheared.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.302.012 |
| Outer Diameter | 195 mm |
| Inner Bore Diameter | 85 mm |
| Flange Thickness | 22.5 mm |
| Bolt Hole PCD | 165 mm (6 holes) |
| Material | Forged 42CrMo4 steel, induction hardened |
| Weight | 2.85 kg |
| OEM Reference | ZF 4657.302.012 |
| Surface Treatment | Zinc-nickel plated (corrosion resistant) |
Compatibility
This bearing flange is specifically designed for the ZF WG210 series, but it also fits the WG180, WG200, and WG220 transmission variants that share the same bearing bore geometry. It is not compatible with the older WG120 series due to different bolt patterns. When replacing this flange, always inspect the mating HOUSING REAR PART for cracks, as flange failure often damages the housing seat.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101047 | TRANSMISSION HOUSING | Main structural casing that encloses all gear sets |
| 4657201027 | HOUS.FRONT SECT | Front section housing the input shaft and pump drive |
| 4657201020 | HOUSING REAR PART | Rear housing that supports the output bearing flange |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for precise flange-to-housing positioning |
| 0636100801 | CAP SCREW | M12 bolt for securing flange to housing |
| 4656301148 | FIXING PLATE | Locking plate to prevent flange bolt loosening |
| 4657301032 | SCREEN SHEET | Fine mesh filter for transmission oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | M10 bolt for screen sheet retention |
| 0750301003 | OIL FEED.HOUSG. | Oil distribution housing for bearing lubrication |
Frequently Asked Questions
Q: Can I reuse the old bearing flange bolts when installing a new 4657.302.012?
A: No. ZF specifies that all fasteners, including the CAP SCREW (0636100801), must be replaced with new OEM bolts to achieve proper torque retention and prevent flange loosening.
Q: How do I know if my WG210 needs a new bearing flange versus just a seal replacement?
A: If you measure more than 0.15 mm of axial play at the output shaft using a dial indicator, the flange bearing seat is worn. A seal-only replacement will fail quickly in this scenario.
Q: Is the 4657.302.012 flange interchangeable with the earlier 4657.302.010 version?
A: No. The .012 revision has a thicker flange face (22.5 mm vs 20 mm) to accommodate updated bearing preload specifications. Using the older version will cause premature bearing failure.
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ZF 4657.302.012 BEARING FLANGE – Bearing RFQ Support
PartsZF supports RFQ preparation for ZF 4657.302.012 BEARING FLANGE with part-number lookup, documentation review, and export coordination for transmission service buyers.
Part-Number Summary
Use ZF number 4657.302.012 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657054060
- Documentation reference available for RFQ review
- Illustration section: INPUT
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 | 4657.302.012 |
|---|---|
| Normalized SKU | 4657302012 |
| Part name | BEARING FLANGE |
| Product category | bearing |
| 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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