Overview
The ZF 4657.109.429 is a precision-engineered OEM genuine component specifically designed for the WG 190 Series transmission. This part functions as a critical sealing and alignment element within the hydraulic control circuit, ensuring proper fluid pressure regulation between the main valve body and the transmission housing. The SKU 4657.109.429 sits directly adjacent to the TRANSMISSION HOUSING and interfaces with the HOUS.FRONT SECT to maintain structural integrity under high torque loads. Without this OEM part, the transmission’s ability to sustain consistent hydraulic pressure is compromised, leading to performance degradation.
Symptoms of Failure
- Hydraulic fluid seepage around the WG190 bell housing: When the 4657.109.429 seal surface degrades, oil leaks appear at the joint between the HOUSING REAR PART and the main casing, often mistaken for a gasket failure.
- Erratic gear engagement under load: A worn part causes pressure drops, resulting in delayed or harsh shifting, particularly in 3rd and 4th gears.
- Metallic debris in transmission fluid: As the component fractures, small particles circulate through the system, accelerating wear on the HOUSING REAR SECTION and adjacent valve bodies.
- Overheating during continuous operation: Reduced hydraulic efficiency forces the transmission to work harder, generating excess heat that shortens fluid life.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.109.429 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Height | 22.3 mm |
| OEM Reference | ZF 4657.109.429 (Genuine) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This OEM genuine part is engineered for the ZF WG 190 Series, but its design also supports select models in the WG180, WG200, and WG210 families. It is a direct replacement for the original factory-installed component in WG190 transmissions used in off-highway trucks, agricultural tractors, and heavy-duty construction equipment. Always verify fitment with your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing that encloses all rotating assemblies |
| 4657201183 | HOUS.FRONT SECT | Front section housing that supports the torque converter and input shaft |
| 4657201184 | HOUSING REAR PART | Rear housing component that aligns the output shaft and PTO drive |
| 4657298111 | HOUSING REAR SECTION | Secondary rear section providing additional bearing support |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for doweling housing sections |
| 0636100801 | CAP SCREW | M10 x 30 mm fastener for securing the housing assembly |
| 4681301015 | FIXING PLATE | Retaining plate for the oil filter and screen assembly |
| 4681301016 | SCREEN SHEET | Fine mesh filter screen for hydraulic fluid intake |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter screen for debris protection |
| 0636100803 | CAP SCREW | M12 x 35 mm fastener for the rear housing section |
Frequently Asked Questions
Q: Can I install the 4657.109.429 without replacing the housing gaskets?
A: It is strongly recommended to replace all sealing elements—including the TRANSMISSION HOUSING gasket and the HOUS.FRONT SECT O-rings—when servicing this part to prevent future leaks.
Q: How do I know if my WG190 transmission needs this specific part?
A: If you observe fluid weeping from the joint between the HOUSING REAR PART and the main case, or if shifting becomes erratic after 10,000 hours of service, the 4657.109.429 is likely worn.
Q: Is this part interchangeable with the WG200 series?
A: While the WG200 shares the same bolt pattern, the internal bore dimensions differ. Always cross-reference your transmission serial number with the OEM parts catalog to confirm compatibility.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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