Overview
The ZF 4657.271.011 COUPLING is a critical OEM genuine component engineered specifically for the WG 190, WG 210, and related heavy-duty transmission series. This precision-machined coupling serves as the primary torque-transfer interface between the engine output and the transmission input shaft, ensuring seamless power delivery under extreme load conditions. Designed to absorb torsional vibrations and misalignment, the SKU 4657.271.011 directly mounts within the bell housing assembly, working in concert with the 4657101085: TRANSMISSION HOUSING to maintain driveline integrity. Its robust construction is essential for preventing drivetrain fatigue in vocational vehicles operating in mining, construction, and municipal applications.
Symptoms of Failure
When the ZF 4657.271.011 coupling begins to degrade, operators will notice distinct performance issues. Oil leaks at the bell housing joint often appear first, as the coupling seal surface wears against the 4657201161: HOUS.FRONT SECT. Intermittent gear slipping under heavy acceleration occurs when the coupling loses its clamping force, allowing momentary disengagement between the engine and transmission. Abnormal low-frequency vibration during deceleration signals that the coupling’s damping elastomer has hardened or cracked. Finally, hard shifting between forward and reverse gears indicates the coupling is no longer maintaining proper axial alignment with the 4657201162: HOUSING REAR PART.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.271.011 |
| Outer Diameter | 195 mm |
| Inner Bore Diameter | 65 mm |
| Overall Length | 112 mm |
| Material | Forged Steel / Nitrile Rubber Damping Element |
| Weight | 4.8 kg (10.6 lbs) |
| Torque Capacity | 2,450 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF coupling is engineered for direct fitment into the WG 190 Series, WG 191 Series, WG 210 Series, WG 211 Series, and WG 230 Series transmissions. It is specifically validated for use with the 4657298107: HOUSING REAR SECTION in WG 210 builds. While primarily designed for WG-series gearboxes, the 4657.271.011 also cross-references into certain ZF 6HP and 8HP automatic transmissions used in fire trucks and refuse vehicles. Always verify spline count and pilot bore dimensions against your existing coupling before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing enclosing gear sets |
| 4657201161 | HOUS.FRONT SECT | Front section housing the coupling and input shaft |
| 4657201162 | HOUSING REAR PART | Rear section supporting output shaft bearings |
| 4657298107 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing-to-coupling registration |
| 0636100801 | CAP SCREW | M12 bolt securing coupling to flywheel |
| 4656301148 | FIXING PLATE | Retaining plate for coupling hub |
| 4657301032 | SCREEN SHEET | Fine mesh debris screen for oil return gallery |
| 4657301033 | SCREEN SHEET | Coarse mesh debris screen for sump pickup |
| 0636100803 | CAP SCREW | M10 bolt for coupling cover plate |
Frequently Asked Questions
Q: Can I reuse the old coupling bolts when installing the 4657.271.011?
A: No. ZF specifies that all cap screws (including 0636100801: CAP SCREW and 0636100803: CAP SCREW) must be replaced with new OEM fasteners to achieve proper torque retention and prevent loosening.
Q: How do I know if my WG 210 needs this coupling versus a full rebuild?
A: If you detect oil seepage at the front housing joint but no metal debris in the pan, the 4657.271.011 coupling is likely the sole failed component. Replace it alongside the 4657201161: HOUS.FRONT SECT gasket for a complete seal.
Q: Does this coupling require special tools for installation?
A> Yes. A ZF coupling alignment tool (part 4657.271.011-T) is recommended to center the damping element within the 4657101085: TRANSMISSION HOUSING bore before torquing the fixing plate (4656301148: FIXING PLATE).
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
