Overview
The ZF 4656.173.055 COUPLING is a critical OEM genuine component engineered for the WG 130 and WG 160 transmission series. This precision-machined coupling serves as the primary torque-transfer interface between the engine output shaft and the transmission input assembly, ensuring seamless power delivery under high-load industrial conditions. As part of the WG 171 Series category, this part (SKU: 4656.173.055) is designed to absorb torsional vibrations and maintain alignment between rotating elements. When installed alongside the 4656101030: TRANSMISSION HOUSING, it forms a sealed, durable driveline connection that withstands extreme thermal and mechanical stress in construction, mining, and material handling equipment.
Symptoms of Failure
- Torque fluctuation under load: Worn coupling splines cause intermittent power loss during acceleration, often described as “transmission slipping when shifting gears.”
- Metallic grinding or clicking noises: Deteriorated rubber or polyurethane elements produce audible chatter from the bell housing area, especially at low RPM.
- Oil seepage at the coupling joint: Cracks in the coupling body allow transmission fluid to escape, leaving visible drips under the vehicle after prolonged operation.
- Excessive driveline vibration: A failing coupling fails to dampen engine harmonics, resulting in steering wheel shake or seat vibration at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.173.055 |
| Outer Diameter | 180 mm |
| Inner Bore Diameter | 55 mm |
| Overall Length | 95 mm |
| Material | High-tensile steel with elastomeric insert |
| Weight | 2.8 kg |
| OEM Reference | ZF 4656.173.055 |
| Torque Capacity | 1,200 Nm |
Compatibility
This coupling is specifically engineered for ZF WG 130 and WG 160 powershift transmissions, commonly found in off-highway vehicles such as wheel loaders, dump trucks, and graders. It also fits select WG 171 Series configurations where the coupling housing interfaces with the 4656301066: HOUS.FRONT SECT. For proper installation, ensure the 4656201015: SCREEN SHEET is clean and the 4656301037: TUBE is free of debris to prevent premature wear. Compatible models include WG180, WG200, and WG240 variants when used with the correct adapter kit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Encloses and supports gear train assembly |
| 4656301066 | HOUS.FRONT SECT | Front section housing for input shaft bearing |
| 4656201015 | SCREEN SHEET | Filter screen for hydraulic fluid return line |
| 4656301037 | TUBE | Oil delivery tube between pump and valve body |
| 0634313514 | O-RING | Seals coupling-to-housing interface |
| 0636100803 | CAP SCREW | M10 fastener for coupling retention |
| 4656301064 | HOUSING REAR PART | Rear housing section for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for coupling centering |
| 0636100801 | CAP SCREW | M8 fastener for front housing |
| 0636100160 | CAP SCREW | M16 fastener for rear housing |
Frequently Asked Questions
Q: Can the 4656.173.055 coupling be used on a WG 180 transmission?
A: Yes, this coupling is compatible with WG 180 models when paired with the correct front housing adapter. Always verify spline count and pilot bore diameter before installation.
Q: What is the typical lifespan of this coupling under normal operating conditions?
A: In standard construction equipment applications with proper lubrication, the OEM coupling typically lasts 3,000–5,000 operating hours. Heavy shock loads or misalignment can reduce this significantly.
Q: Do I need to replace the O-ring and cap screws when installing this coupling?
A: Yes, ZF recommends replacing the 0634313514: O-RING and all 0636100803: CAP SCREW fasteners during coupling replacement to ensure proper torque retention and leak-free sealing.
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Phone: +86 158 2286 3467 |
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