Overview
The ZF 4656.272.011 COUPLING is a precision-engineered component designed for the WG 130 and WG 160 transmission series, serving as a critical link within the driveline assembly. This OEM genuine part, identified by SKU 4656.272.011, sits between the transmission housing and the output shaft assembly, ensuring seamless torque transfer and dampening torsional vibrations. It is a direct replacement for units in the WG 200 Series category, maintaining the exact tolerances required for long-term reliability in heavy-duty industrial applications. When installed alongside the 4656101023: TRANSMISSION HOUSING, this coupling ensures proper alignment and load distribution across the entire gear train.
Symptoms of Failure
When the ZF 4656.272.011 coupling begins to wear, operators may notice distinct operational issues. Common failure symptoms include:
- Oil leaks near the coupling housing: Worn seals or cracked coupling surfaces can cause transmission fluid to escape, leading to low oil levels and overheating.
- Gear slipping under load: A degraded coupling loses its ability to maintain positive engagement, resulting in intermittent power loss during acceleration or hill climbing.
- Abnormal driveline vibrations: As the coupling’s damping properties degrade, excessive vibration transfers to the 4656201016: HOUS.FRONT SECT, creating a noticeable shudder at specific RPM ranges.
- Metallic grinding noises: Internal wear between the coupling and adjacent components, such as the 4656301142: OIL TUBE, produces audible scraping sounds during operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.272.011 |
| Material | High-strength alloy steel with nitrided surface |
| Outer Diameter | 120 mm |
| Inner Diameter | 45 mm |
| Overall Length | 85 mm |
| Weight | 1.8 kg |
| OEM Reference | ZF 4656.272.011 |
| Torque Capacity | 1,200 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This coupling is engineered for ZF WG-series transmissions, specifically the WG 130 and WG 160 models. It is also compatible with the broader WG 200 Series, including variants such as WG 180, WG 200, and WG 210. The part interfaces directly with the 4656201029: HOUSING REAR PART, making it essential for any rebuild or overhaul of these transmission units. Always verify your transmission’s serial number against the OEM parts catalog to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101023 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4656201016 | HOUS.FRONT SECT | Front section housing for input shaft and bearing assembly |
| 4656301142 | OIL TUBE | Routes lubricating oil to critical wear surfaces |
| 4656201029 | HOUSING REAR PART | Rear section housing for output shaft and coupling interface |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise component positioning |
| 4656301148 | FIXING PLATE | Secures coupling assembly to prevent axial movement |
| 0636102489 | CAP SCREW | Fastener for mounting coupling to housing |
| 4656301016 | SCREEN SHEET | Filter screen for oil intake port |
| 4656301017 | SCREEN SHEET | Secondary filter screen for return oil line |
| 0636100803 | CAP SCREW | Fastener for oil tube and screen assembly |
