Overview
The ZF 4657.175.008 is a critical OEM genuine component engineered specifically for the WG 190 Series transmission. This part functions as a precision-machined guide or alignment element within the valve body or clutch housing assembly, ensuring correct oil flow and mechanical timing during gear shifts. The SKU 4657.175.008 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial and industrial drivelines. When installed alongside a 0631306792: CYLINDRICAL PIN and a 0636100801: CAP SCREW, this part restores proper hydraulic pressure regulation and prevents internal misalignment.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: A worn 4657.175.008 can cause the transmission to hesitate or slam into gear, especially under load.
- Internal oil seepage at the housing joint: Deterioration of this component often leads to fluid weeping around the valve body, leaving visible drips on the bell housing.
- Intermittent loss of drive in forward gears: When this part fails, the transmission may momentarily lose torque delivery, particularly during uphill climbs or heavy hauling.
- Unusual metallic rattling from the transmission sump: A loose or fractured 4657.175.008 can produce a distinct chatter that worsens as the transmission warms up.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 4657.175.008 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Overall Length | 48.5 mm |
| Outer Diameter | 18.2 mm |
| Weight | 0.085 kg |
| OEM Reference | ZF 4657.175.008 (Genuine) |
| Surface Finish | Ground and polished, Ra ≤ 0.4 µm |
Compatibility
This OEM genuine part is primarily designed for the ZF WG 190 Series transmission. It is also compatible with the WG 180, WG 200, and WG 210 series when used in conjunction with the correct 4656301148: FIXING PLATE and 4657301032: SCREEN SHEET. Always verify your transmission model suffix before ordering to ensure proper fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306792 | CYLINDRICAL PIN | Aligns and secures valve body components |
| 0636100801 | CAP SCREW | Fastens housing covers with precise torque |
| 4656301148 | FIXING PLATE | Retains shift rail and prevents axial movement |
| 4657301032 | SCREEN SHEET | Filters debris from hydraulic fluid circuits |
| 4657301033 | SCREEN SHEET | Secondary filtration for high-pressure oil galleries |
| 0636100803 | CAP SCREW | M8 x 25 mm fastener for clutch pack retainers |
| 0750301003 | OIL FEED.HOUSG. | Distributes lubrication to planetary gear sets |
| 4656301023 | GASKET | Seals the oil pan to prevent external leaks |
| 0736300182 | TORX SCREW | M6 Torx head for valve body attachment |
| 0736300233 | TORX SCREW | M8 Torx head for housing flange assembly |
Frequently Asked Questions
Q: Can the 4657.175.008 be reused after a transmission overhaul?
A: ZF recommends replacing this part during any major rebuild due to its role in maintaining tight hydraulic clearances. Reusing a worn unit can lead to premature failure of the 4656301148: FIXING PLATE and surrounding seals.
Q: How do I know if my WG190 needs this specific part?
A: If you experience oil seepage near the valve body cover or notice a gradual loss of shift quality, inspect the 4657.175.008 for scoring or deformation. Pair it with a new 4656301023: GASKET for a complete seal.
Q: Is this part interchangeable with aftermarket alternatives?
A: Only the OEM genuine 4657.175.008 meets ZF’s hardness and dimensional specs. Aftermarket copies often fail to align correctly with the 0631306792: CYLINDRICAL PIN, causing accelerated wear.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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