Overview
The ZF 4657.183.421 is a precision-engineered OEM genuine component designed specifically for the WG190 and WG210 transmission series. This part functions as a critical sealing and alignment element within the transmission housing assembly, ensuring proper oil circulation and preventing contamination between gear stages. As an original ZF part, the SKU 4657.183.421 guarantees exact fitment and material compatibility with factory specifications, reducing the risk of premature wear in heavy-duty commercial vehicle applications. It is positioned between the HOUS.FRONT SECT and the HOUSING REAR PART, forming a sealed cavity that maintains hydraulic pressure for clutch actuation.
Symptoms of Failure
- Oil seepage at housing joint: When the 4657.183.421 degrades, you may notice transmission fluid weeping from the seam between the TRANSMISSION HOUSING and the rear section, often mistaken for a gasket failure.
- Erratic gear engagement: A worn part can cause inconsistent hydraulic pressure, leading to delayed or harsh shifting in the WG190 and WG210 series.
- Metallic debris in oil pan: Material fatigue from this component can shed particles into the transmission fluid, accelerating wear on bearings and clutches.
- Vibration during load cycles: Loss of structural integrity may allow misalignment between the HOUSING REAR SECTION and the main casing, producing low-frequency vibration under torque.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.183.421 |
| Material | High-grade aluminum alloy with corrosion-resistant coating |
| Weight | 1.85 kg (4.08 lbs) |
| Length | 245 mm |
| Width | 118 mm |
| Height | 72 mm |
| OEM Reference | ZF 4657.183.421 (Genuine) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF part is engineered for the WG190 and WG210 transmission families, which are widely used in municipal buses, refuse trucks, and medium-duty construction vehicles. It is also compatible with the WG180 and WG200 variants where the housing architecture matches. The 4657.183.421 interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, making it a direct replacement for units produced after 2015. Always verify your transmission serial number against ZF’s compatibility matrix before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing that encloses gear sets and supports shaft alignment |
| 4657201161 | HOUS.FRONT SECT | Forward section of the housing that mounts the torque converter and pump |
| 4657201162 | HOUSING REAR PART | Rear housing segment that supports output shaft and rear bearing carrier |
| 4657298107 | HOUSING REAR SECTION | Extended rear cover that seals the transmission and houses the PTO interface |
| 0631306816 | CYLINDRICAL PIN | Precision dowel pin for aligning housing halves during assembly |
| 0636100801 | CAP SCREW | M10 x 30 mm fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retaining plate that locks the component in position within the housing |
| 4657301032 | SCREEN SHEET | Fine mesh filter that prevents debris from entering hydraulic circuits |
| 4657301033 | SCREEN SHEET | Secondary filter screen for high-pressure oil return lines |
| 0636100803 | CAP SCREW | M12 x 35 mm bolt for heavy-duty housing connections |
Frequently Asked Questions
Q: Can the 4657.183.421 be reused after a transmission overhaul?
No. ZF specifies this as a one-time-use component due to crush-washer deformation during initial torque. Always replace it with a new OEM part to maintain sealing integrity.
Q: What tools are required to install this part?
Installation requires a torque wrench (range 25-40 Nm), a soft-faced mallet for alignment, and a hex socket set. The CAP SCREW and CYLINDRICAL PIN must be replaced simultaneously.
Q: Does this part fit the ZF WG210 with a PTO?
Yes, it is compatible with PTO-equipped WG210 units, provided the HOUSING REAR SECTION is also the correct variant for your PTO configuration.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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