Overview
The ZF 4657.172.039 COUPLING is a critical torque-transfer component engineered specifically for the WG 190 and WG 210 series transmissions. This OEM genuine part sits between the transmission housing and the front section assembly, ensuring precise alignment and dampening torsional vibrations during gear shifts. The SKU 4657.172.039 is manufactured to ZF’s exacting tolerances, providing a direct replacement that restores factory-spec driveline performance. When installed alongside the 4657101085: TRANSMISSION HOUSING, this coupling maintains the structural integrity required for heavy-duty industrial applications.
Symptoms of Failure
- Oil seepage at the coupling joint: Worn seals within the 4657.172.039 coupling allow transmission fluid to escape, often visible as drips near the bell housing. This is a common long-tail search query for “ZF WG190 coupling oil leak.”
- Audible clunking during gear engagement: Excessive play in the coupling splines produces a metallic knocking sound when shifting from neutral to drive, indicating imminent failure.
- Vibration under load: A degraded coupling cannot absorb driveline harmonics, causing noticeable shaking at highway speeds or under heavy torque. This symptom often triggers searches for “ZF transmission vibration coupling replacement.”
- Erratic gear engagement: Misalignment from a failing coupling leads to delayed or harsh shifts, as the transmission control unit compensates for mechanical slack.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.172.039 |
| Material | High-strength alloy steel with nitrided surface |
| Outer Diameter | 210 mm |
| Inner Diameter (Spline) | 65 mm |
| Overall Length | 95 mm |
| Weight | 4.2 kg |
| Torque Capacity | 2,800 Nm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4657.172.039 (Genuine) |
Compatibility
This coupling is designed for ZF WG 190 and WG 210 series transmissions, commonly found in municipal trucks, refuse vehicles, and construction equipment. It also fits select WG 180 and WG 200 variants when used with the correct 4657201161: HOUS.FRONT SECT and 4657201162: HOUSING REAR PART. For WG 210 applications, pairing with the 4657298107: HOUSING REAR SECTION ensures proper sealing and alignment. Always verify your transmission model suffix before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201161 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201162 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 4657298107 | HOUSING REAR SECTION | Extended rear housing for WG210 models |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-coupling interface |
| 0636100801 | CAP SCREW | M12 fastener for coupling retention |
| 4656301148 | FIXING PLATE | Locking plate for coupling bolt security |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return gallery |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for main sump |
| 0636100803 | CAP SCREW | M10 fastener for housing sections |
Frequently Asked Questions
Q: Can the 4657.172.039 coupling be reused after removal?
A: No. ZF specifies this coupling as a single-use component due to its interference fit and torque-to-yield fasteners. Always replace it with a new OEM part to avoid premature failure.
Q: What torque specification is required for installation?
A: The coupling bolts (including 0636100801: CAP SCREW) must be tightened to 120 Nm plus 90 degrees rotation. Use a new 4656301148: FIXING PLATE to lock the fasteners.
Q: Does this part fit the ZF WG 180 transmission?
A: Yes, but only when used with the 4657201161: HOUS.FRONT SECT from a WG 190 donor. Direct fitment is guaranteed for WG 190 and WG 210 models only.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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