Overview
The ZF 4657.025.110 is a precision-engineered internal component designed specifically for the WG 190 Series transmission. This OEM genuine part plays a critical role in maintaining proper hydraulic pressure and gear alignment within the transmission’s valve body assembly. As a direct replacement for worn units, the SKU 4657.025.110 ensures that your WG190 transmission retains its factory-specified shift quality and torque handling capability. When installed alongside the 4657101082: TRANSMISSION HOUSING, this part forms a sealed, high-pressure circuit essential for reliable operation in heavy-duty industrial applications.
Symptoms of Failure
When the ZF 4657.025.110 begins to degrade, operators typically notice three distinct failure modes. First, erratic gear engagement occurs as internal sealing surfaces lose integrity, causing delayed or harsh shifts. Second, intermittent loss of drive pressure manifests as a slipping sensation under load, particularly when climbing grades or towing. Third, visible hydraulic fluid contamination appears around the valve body area, often accompanied by a burnt smell from overheated oil. These symptoms directly impact the surrounding assembly, including the 4657201166: HOUS.FRONT SECT, which may suffer from uneven wear if the part is not replaced promptly.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.025.110 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Width | 68 mm |
| Height | 45 mm |
| Operating Pressure Range | 12–18 bar (174–261 psi) |
| OEM Reference | ZF 4657.025.110 (Genuine) |
Compatibility
This part is engineered for the ZF WG 190 Series transmission family, including models WG180, WG190, and WG200. It is also compatible with certain variants of the WG210 and WG220 when used in conjunction with the 4657201170: HOUSING REAR PART and the 4657298102: HOUSING REAR SECTION. Always verify your transmission’s serial number before ordering, as minor revisions may affect fitment. The 4657.025.110 is not backward-compatible with older WG150 or WG160 units without significant modification to the valve body.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing pump and converter |
| 4657201170 | HOUSING REAR PART | Rear section supporting output shaft |
| 4657298102 | HOUSING REAR SECTION | Secondary rear housing for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M10 fastener for housing bolts |
| 4656301148 | FIXING PLATE | Retainer for valve body components |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | M12 fastener for rear housing |
Frequently Asked Questions
Q: Can I install the 4657.025.110 without replacing the housing gaskets?
A: No. ZF recommends replacing all sealing elements—including the gasket set for the TRANSMISSION HOUSING—when servicing this part to prevent future leaks.
Q: How do I confirm this part fits my WG190 transmission?
A: Check the transmission’s serial number plate. The 4657.025.110 is compatible with WG190 units built after 2015. For earlier models, verify the valve body revision against the HOUS.FRONT SECT dimensions.
Q: What is the typical service life of this component?
A: Under normal operating conditions (500-hour oil change intervals), the 4657.025.110 lasts approximately 8,000–10,000 hours. Heavy contamination or overheating can reduce this to 4,000 hours.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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