Overview
The ZF 4657.183.123 is a precision-engineered component designed specifically for the WG 190 Series transmission. This OEM genuine part plays a critical role in the hydraulic control circuit, ensuring proper fluid routing and pressure regulation within the transmission assembly. As a direct replacement for the original factory unit, the SKU 4657.183.123 restores the transmission’s ability to maintain consistent gear engagement and thermal stability. It is installed within the main valve body area, interfacing directly with the 4657101033: TRANSMISSION HOUSING to create a sealed, high-pressure environment essential for smooth shifting.
Symptoms of Failure
- Erratic shifting or delayed engagement: When the 4657.183.123 wears, you may notice hesitation when moving from neutral into drive or reverse, particularly under load.
- Internal fluid leaks: A degraded seal or cracked body leads to low line pressure, visible as drips near the bell housing or around the 4657201027: HOUS.FRONT SECT.
- Transmission overheating: Insufficient hydraulic flow caused by a failing part forces the system to work harder, raising operating temperatures above normal thresholds.
- Gear slippage under acceleration: A worn 4657.183.123 cannot hold pressure, causing the transmission to slip out of gear during highway driving or uphill climbs.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.183.123 |
| Material | Die-cast aluminum alloy with nitrile seals |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Width | 68 mm |
| Height | 45 mm |
| OEM Reference | ZF 4657.183.123 |
| Operating Pressure | 12–18 bar |
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 same hydraulic control architecture is used. The 4657.183.123 mounts directly onto the 4657201012: HOUSING REAR PART and is secured using a 0631306792: CYLINDRICAL PIN for precise alignment. Always verify your transmission model number before ordering to ensure a perfect fit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing that encloses all internal components |
| 4657201027 | HOUS.FRONT SECT | Front section housing that supports the input shaft and pump |
| 4657201012 | HOUSING REAR PART | Rear housing that contains the output shaft and governor assembly |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for precise positioning of housing sections |
| 0636100801 | CAP SCREW | Fastener for securing valve body covers |
| 4656301148 | FIXING PLATE | Retaining plate for clutch pack assemblies |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4657301033 | SCREEN SHEET | Secondary filter screen for high-pressure circuits |
| 0636100803 | CAP SCREW | Bolt for oil pan attachment |
| 4681301040 | OIL FEED.HOUSG. | Housing for the main oil feed line |
Frequently Asked Questions
Q: Can I install the 4657.183.123 without replacing the seals?
A: It is strongly recommended to replace all seals and gaskets when installing this part. The component works in tandem with the TRANSMISSION HOUSING and old seals can cause immediate leaks.
Q: How do I know if my WG 190 needs this specific part?
A: If you experience low line pressure or erratic shifting after checking fluid levels, the 4657.183.123 is a common failure point. Inspect the CYLINDRICAL PIN for wear as well, as misalignment can damage the new part.
Q: Is this part interchangeable with the WG 180 series?
A: Yes, the 4657.183.123 is physically identical to the WG 180 variant. However, always confirm your transmission’s serial number to ensure the correct hydraulic flow rating.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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