Overview
The ZF 4657.174.023 COUPLING is a precision-engineered component designed for the WG 190 and WG 210 series transmissions. This OEM genuine part serves as the critical link between the transmission housing and the front section assembly, ensuring proper torque transfer and alignment during operation. As a direct replacement for the original factory-installed coupling, the SKU 4657.174.023 is manufactured to exact ZF specifications, providing reliable performance in heavy-duty industrial applications. This coupling sits at the interface where the TRANSMISSION HOUSING meets the HOUS.FRONT SECT, making it a vital component for maintaining drivetrain integrity.
Symptoms of Failure
- Oil leaks at the coupling joint: When the 4657.174.023 coupling wears, you may notice transmission fluid seeping from the seam between the housing sections, often mistaken for a gasket failure.
- Vibration during gear engagement: A worn coupling can cause noticeable shuddering or shaking when shifting between forward and reverse gears, particularly under load.
- Misalignment noise: A rhythmic clicking or knocking sound from the transmission belly indicates the coupling has lost its precise fit, leading to metal-on-metal contact.
- Reduced torque transmission: Operators may experience sluggish acceleration or a feeling of “slipping” as the coupling fails to properly transfer power from the engine to the HOUSING REAR PART.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.174.023 |
| Material | High-strength alloy steel, heat-treated |
| Outer Diameter | 120 mm (estimated) |
| Inner Diameter | 45 mm (estimated) |
| Thickness | 18 mm (estimated) |
| Weight | 0.85 kg (estimated) |
| OEM Reference | ZF 4657.174.023 |
| Surface Finish | Zinc-plated, corrosion resistant |
Compatibility
This coupling is specifically engineered for the ZF WG 210 series transmissions, with confirmed compatibility across the WG 190 and WG 200 models. It is commonly found in the following ZF transmission variants: WG180, WG190, WG200, and WG210. The part is designed to work with the CYLINDRICAL PIN that secures the coupling to the housing assembly. For proper installation, ensure the coupling aligns with the corresponding splines on the transmission input shaft. This part is not interchangeable with earlier WG series models without verifying housing dimensions.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101042 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201028 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201013 | HOUSING REAR PART | Rear section housing for output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for coupling installation |
| 0636100801 | CAP SCREW | Fastener for housing assembly |
| 4656301148 | FIXING PLATE | Secures coupling to housing |
| 4657301034 | SCREEN SHEET | Filter screen for oil circulation |
| 4657301035 | SCREEN SHEET | Secondary filter screen |
| 0636100803 | CAP SCREW | Bolt for screen sheet retention |
| 4656301048 | OIL FEED.HOUSG. | Oil feed housing for lubrication |
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