Overview
The ZF 317 减振器 (part number 47 1700 001 364) is a critical torsional vibration damper engineered specifically for heavy-duty construction machinery transmissions. This OEM genuine component sits directly on the transmission input shaft, where it absorbs and dissipates harmful torsional vibrations generated by the engine’s crankshaft. By isolating the driveline from these oscillations, the damper protects gear sets, clutches, and bearings from premature fatigue. The SKU 317 is precision-balanced to ensure smooth power delivery under extreme load conditions, making it indispensable for maintaining driveline integrity in excavators, wheel loaders, and graders.
Symptoms of Failure
When the ZF 317 damper degrades, operators will notice distinct performance issues. Look for these specific failure indicators:
- Low-frequency driveline shudder – A pronounced vibration at idle or low RPM, often misdiagnosed as engine misfire.
- Metal-on-metal clunking – Audible knocking from the bell housing during gear engagement or load reversal.
- Premature clutch wear – Slipping or chattering clutches that require frequent adjustment, caused by unabsorbed torsional spikes.
- Oil contamination from rubber debris – Black, granular particles in the transmission fluid, indicating the damper’s elastomeric element is disintegrating.
Technical Specifications
| Parameter | Value |
|---|---|
| Outer Diameter | 317 mm |
| Hub Bore Diameter | 47 mm |
| Overall Height | 85 mm |
| Material | Forged steel hub with high-tensile rubber compound |
| Weight | 4.2 kg |
| OEM Reference | 47 1700 001 364 |
| Max Torque Capacity | 2,100 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This damper is designed for ZF’s modular transmission family used in off-highway construction equipment. It directly fits the following models:
- ZF WG180 – Powershift transmission for wheel loaders and telehandlers.
- ZF WG200 – Heavy-duty variant for excavators and dozers.
- ZF 4WG-200 – Four-speed version with integrated torque converter.
- ZF 6WG-250 – Six-speed unit for large graders and mining trucks.
Always verify the damper’s spline count (typically 24-tooth) and pilot bearing fitment against your specific transmission serial number before installation.
