Overview
The ZF 4656.173.064 COUPLING is a critical torque-transfer component engineered for the WG 130 and WG 160 series transmissions. This OEM genuine part serves as the mechanical link between the engine output and the transmission input shaft, ensuring smooth power delivery and dampening torsional vibrations. Identified by SKU 4656.173.064, this coupling sits directly within the driveline assembly, interfacing with the TRANSMISSION HOUSING to maintain precise alignment under high-load conditions. Its robust construction is designed to withstand continuous industrial duty cycles, making it a vital component for fleet reliability.
Symptoms of Failure
When the ZF 4656.173.064 coupling begins to degrade, operators may notice these specific failure indicators:
- Oil leaks near the bell housing – Worn coupling seals allow transmission fluid to escape, often visible as drips around the HOUS.FRONT SECT interface.
- Gear slipping under load – A failing coupling cannot maintain torque lock, causing intermittent slipping during acceleration or uphill operation.
- Metallic rattling or clunking – Excessive play in the coupling produces audible noise, especially when shifting between forward and reverse.
- Vibration through the chassis – Imbalanced coupling rotation transmits harsh vibrations to the HOUSING REAR PART, felt in the cab or frame.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4656.173.064 |
| Material | High-strength alloy steel with nitrided surface |
| Outer Diameter | 180 mm |
| Inner Diameter | 65 mm |
| Overall Length | 95 mm |
| Weight | 2.8 kg |
| Torque Capacity | 1,200 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This coupling is primarily designed for the WG 130 and WG 160 transmission series. It also fits select variants of the WG 180 and WG 200 models when used with the appropriate HOUSING REAR SECTION. Always verify your transmission’s serial number against OEM specifications before installation. The coupling is not backward-compatible with older WG 80 or WG 120 series without adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101070 | TRANSMISSION HOUSING | Encloses and supports all internal gear components |
| 4656201085 | HOUS.FRONT SECT | Front section housing for input shaft and coupling |
| 4656201089 | HOUSING REAR PART | Rear housing section supporting output bearings |
| 4656298057 | HOUSING REAR SECTION | Alternate rear housing for extended gear sets |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-coupling fitment |
| 4656301148 | FIXING PLATE | Secures coupling to transmission input shaft |
| 0636100817 | CAP SCREW | Fastener for coupling retaining plate |
| 4656301016 | SCREEN SHEET | Fine mesh filter for transmission oil circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh filter for pre-sump debris capture |
| 0636100803 | CAP SCREW | Bolt for housing flange connection |
Frequently Asked Questions
Q: Can I replace the 4656.173.064 coupling without removing the entire transmission?
A: Yes, in most WG 130 and WG 160 installations, the coupling can be accessed by separating the HOUS.FRONT SECT from the main housing. However, always consult your service manual for specific clearance requirements.
Q: How often should this coupling be inspected?
A: ZF recommends visual inspection every 500 operating hours or during major transmission overhauls. Look for spline wear, surface cracks, or fretting corrosion on the mating faces.
Q: Is the 4656.173.064 compatible with aftermarket transmission housings?
A: This OEM part is dimensionally matched to genuine ZF housings. Using it with non-OEM TRANSMISSION HOUSING components may cause misalignment and premature failure.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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