Overview
The ZF 4657.201.030 is a precision-engineered OEM genuine component designed specifically for the WG 190 Series transmission. This part serves as a critical internal sealing and alignment element within the hydraulic control system, ensuring proper oil flow and pressure regulation during gear shifts. As an original ZF part, the 4657.201.030 guarantees exact fitment and long service life. When installed alongside the 0631306792: CYLINDRICAL PIN and the 0636100801: CAP SCREW, this assembly maintains the structural integrity of the valve body housing.
Symptoms of Failure
- Oil leaks around the valve body: A worn 4657.201.030 can cause transmission fluid to seep past sealing surfaces, leading to low fluid levels and overheating.
- Erratic or delayed gear engagement: When this component degrades, hydraulic pressure drops, resulting in hesitant shifting or slipping between gears.
- Whining or buzzing noises from the transmission: Internal misalignment caused by a failing part creates abnormal hydraulic turbulence, producing audible sounds during operation.
- Burning smell from transmission fluid: Reduced oil flow due to a compromised seal can cause localized overheating, producing a distinct burnt odor.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.201.030 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.18 kg (0.40 lbs) |
| Length | 42.5 mm |
| Outer Diameter | 18.0 mm |
| OEM Reference | ZF 4657.201.030 |
| Thread Type | Metric fine (M12 x 1.5) |
Compatibility
This genuine ZF part is engineered for the WG 190 Series transmission family. It is also compatible with the WG 180, WG 200, and WG 210 models where the valve body assembly shares identical mounting dimensions. Always verify fitment using your transmission serial number. For proper installation, pair this component with the 4656301148: FIXING PLATE to secure the assembly, and use the 4657301032: SCREEN SHEET to protect against debris ingress.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for valve body positioning |
| 0636100801 | CAP SCREW | Fastener for securing transmission housing |
| 4656301148 | FIXING PLATE | Retains internal components in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4657301033 | SCREEN SHEET | Alternative mesh filter variant |
| 0636100803 | CAP SCREW | Alternate thread fastener for housing |
| 0631311009 | GROOVED STUD | Threaded rod for mounting brackets |
| 0750301003 | OIL FEED.HOUSG. | Housing for oil supply line connection |
| 4656301023 | GASKET | Sealing ring between transmission sections |
| 0736300182 | TORX SCREW | Tamper-resistant fastener for valve body |
Frequently Asked Questions
Q: How do I know if the 4657.201.030 needs replacement?
A: Check for visible oil stains around the valve body area or perform a pressure test. If hydraulic pressure drops below 8 bar during operation, this component is likely worn.
Q: Can I install this part without removing the entire transmission?
A: Yes, the 4657.201.030 is accessible after removing the transmission oil pan and lower valve body cover. However, always replace the 4656301023: GASKET during reassembly to prevent leaks.
Q: Is this part interchangeable with aftermarket versions?
A: Only OEM genuine ZF parts like the 4657.201.030 meet the exact hardness and dimensional tolerances required for WG 190 transmissions. Aftermarket copies often fail prematurely due to inferior materials.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
