Overview
The ZF 4660.274.015 COUPLING is a critical OEM genuine component engineered for the WG 92 and WG 98 transmission series. This precision-machined coupling serves as the primary torque transfer interface between the engine output and the transmission input shaft, ensuring smooth power delivery under heavy-duty industrial loads. As part number 4660.274.015, it directly interfaces with the 4950101004: HOUSING and the 4950301018: HOUSING I to maintain concentric alignment within the driveline assembly. This genuine ZF coupling is designed to withstand high torsional stresses while compensating for minor axial misalignment, making it indispensable for continuous operation in construction, mining, and material handling equipment.
Symptoms of Failure
When the ZF 4660.274.015 coupling begins to wear, operators may notice several distinct failure indicators. Transmission gear slipping under load is a common early symptom, as the coupling loses its ability to maintain positive engagement between rotating shafts. Metallic grinding noises during acceleration often indicate spline wear or material fatigue within the coupling hub. Visible oil seepage around the coupling housing can occur when the coupling distorts, compromising the seal interface with the 0734309932: SHAFT SEAL. Additionally, excessive driveline vibration at specific RPM ranges suggests the coupling has developed uneven wear patterns, which can accelerate damage to the 4660101023: TRANSMISSION HOUSING if left unaddressed.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4660.274.015 |
| OEM Reference | ZF 4660.274.015 |
| Material | High-strength alloy steel, induction-hardened |
| Outer Diameter | 195 mm (estimated) |
| Inner Diameter | 85 mm (estimated) |
| Overall Length | 145 mm (estimated) |
| Weight | 4.2 kg (estimated) |
| Spline Count | 24-tooth internal spline (estimated) |
| Max Torque Capacity | 2,800 Nm (estimated) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF coupling is specifically designed for the WG 92 and WG 98 transmission families. It is a direct replacement for units used in WG180, WG200, and WG250 models that share the same spline geometry and housing interface. The 4660.274.015 coupling is also compatible with certain WG 120 variants when used with the correct 4660301058: HOUSING adapter. Always verify the spline count and pilot bore dimensions against your existing coupling before installation. This part is not backward-compatible with older WG 80 series transmissions without additional modifications to the 0631306174: CYLINDRICAL PIN alignment system.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4950101004 | HOUSING | Encloses and supports the coupling assembly |
| 4950301018 | HOUSING I | Primary structural housing for input shaft |
| 0734309932 | SHAFT SEAL | Prevents oil leakage at coupling interface |
| 4660101023 | TRANSMISSION HOUSING | Main transmission casing |
| 4660301058 | HOUSING | Adapter housing for alternate WG models |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for housing positioning |
| 0750100022 | SCREW PLUG | Seals oil passages in housing |
| 4660301009 | BRACKET | Mounting bracket for transmission support |
| 4660221039 | TUBE | Oil supply tube for lubrication |
| 0636103274 | CAP SCREW | Fastener for housing attachment |
