ZF 4657.172.023 COUPLING for WG 190/WG 210 | OEM Genuine Part

Overview

The ZF 4657.172.023 COUPLING is a precision-engineered component designed for the WG 190, WG 210, and WG 230 series transmissions. This OEM genuine part serves as the critical interface between the engine output and the transmission input shaft, ensuring smooth torque transfer and dampening torsional vibrations. Positioned directly within the bell housing assembly, the coupling (SKU: 4657.172.023) works in concert with the 4657101078: TRANSMISSION HOUSING to maintain driveline alignment and reduce stress on internal gears. Its robust construction is essential for maintaining operational efficiency in heavy-duty industrial applications.

Symptoms of Failure

• Torque Fluctuation During Acceleration: A worn 4657.172.023 coupling often causes irregular power delivery, leading to noticeable surging or hesitation when the vehicle is under load.
• Metallic Clattering from Bell Housing: As the coupling’s elastomeric elements degrade, you may hear distinct rattling or clanking noises, particularly during gear shifts or at idle.
• Transmission Fluid Contamination: Cracks in the coupling hub can allow lubricant to escape, mixing with debris and causing dark, gritty oil on the dipstick.
• Vibration at Specific RPM Ranges: Excessive wear in the coupling’s dampening mechanism often produces a resonant vibration felt through the chassis between 1,200 and 1,800 RPM.

Technical Specifications

Compatibility

This coupling is engineered for the ZF WG series of powershift transmissions. It is directly compatible with the WG 190, WG 210, and WG 230 models, commonly found in construction equipment, material handlers, and agricultural machinery. The part also fits select WG 180 and WG 200 variants when used with the appropriate 4657201166: HOUS.FRONT SECT and 4657201168: HOUSING REAR PART. For complete assembly verification, always cross-reference the 4657298101: HOUSING REAR SECTION to ensure proper spline engagement.

Related Components

Frequently Asked Questions

Q: How do I know if the 4657.172.023 coupling needs replacement?
A: Listen for a distinct “clunk” when shifting from neutral to drive, and check for visible rubber cracking around the coupling’s outer ring. If you also notice oil weeping from the bell housing drain hole, immediate replacement is recommended.

Q: Can this coupling be used with a WG 230 transmission?
A: Yes, the 4657.172.023 is fully compatible with the WG 230 series, provided the transmission uses the standard input shaft spline configuration. Always verify the spline count (typically 14-tooth) against your existing coupling.

Q: What other parts should I replace when servicing this coupling?
A: It is best practice to replace the 0631306816: CYLINDRICAL PIN and all 0636100801: CAP SCREW fasteners simultaneously, as these components experience identical wear cycles and can compromise the new coupling’s alignment if reused.