Vibration Damper 3977785 for cumm-ins QSB6.7 Engine
Keywords: 3977785 vibration damper, QSB6.7 crankshaft pulley damper, cumm-ins QSB6.7 torsional vibration damper, excavator engine damper, construction machinery spare parts, aftermarket replacement vibration damper
🔹Product Overview
Vibration Damper Part No.3977785 is crankshaft torsional vibration damper, specially designed for cumm-ins QSB6.7 diesel engines. It absorbs and counteracts torsional vibration generated during crankshaft operation, reduces engine vibration amplitude, protects crankshaft and related components from fatigue damage, stabilizes engine running condition, lowers noise and extends whole‑engine service life. It is ideal replacement for cracked, aged or invalid original dampers, solving abnormal engine vibration, belt shaking and premature accessory wear for excavators and heavy‑duty construction equipment.
🔹Detailed Specifications
| Item |
Details |
| Part Number |
3977785 |
| Product Name |
Crankshaft Vibration Damper / Torsional Damper |
| Fit Engine |
cumm-ins QSB6.7 Diesel Engine |
| Fit Application |
Excavator, wheel loader and other heavy‑duty construction machinery |
| Application |
Replace aged or damaged vibration damper, eliminate excessive crankshaft torsional vibration, protect engine crankshaft assembly |
| Function |
Absorb crankshaft torsional vibration, reduce engine vibration and noise, prevent crankshaft fatigue fracture |
| Type |
Aftermarket New Vibration Damper |
| Quality Standard |
OEM matching dimension, strict balance test and material inspection before shipment |
| MOQ |
1 UNIT |
| Packing |
Independent shock‑proof inner packing + export outer carton |
| Price Term |
Negotiable, EXW / FOB / CIF terms are supported |
| Delivery Time |
3‑7 days for in‑stock items |
🔹Key Features & Advantages
- Accurate OEM outer diameter, mounting hole position and overall dimension Direct fit for QSB6.7 engine crankshaft, perfect installation without secondary processing.
- High‑strength metal housing and premium damping rubber layer Excellent vibration‑absorbing performance, anti‑aging, oil‑resistant, adapt harsh high‑temperature engine compartment environment.
- Precise dynamic balance treatment Effectively restrain crankshaft torsional oscillation, avoid abnormal vibration of belts and engine accessories.
- Rigorous factory inspection before delivery Each damper passes balance and appearance inspection to avoid assembly vibration failure.
- Good interchangeability & easy installation Fully interchangeable with original part, suitable for repair shop maintenance and engine overhaul projects.
🔹Application Scope
Compatible Equipment List: ‑ Fit Engine: cumm-ins QSB6.7 diesel engine, widely used for excavators, wheel loaders and various construction machinery. ‑ Widely used for engine repair workshops and machinery fleets for engine vibration system maintenance.
🔹Our Company Advantage
We are professional supplier of full‑range construction machinery spare parts, supplying vibration dampers, fuel injectors, piston kits, cylinder liners, piston ring sets, gaskets, sensors and complete engine overhaul kits. ‑ Large ready stock for various machinery spare parts ‑ Factory‑direct wholesale competitive price ‑ Mixed‑order & one‑stop spare‑parts procurement supported ‑ Professional part‑number matching technical support service
🔹Packaging & Shipping
‑ Anti‑collision inner package, protect damper rubber layer and balance surface during transportation ‑ Export‑grade outer carton for safe sea and land transportation ‑ Multiple shipping options: sea freight, air freight, international express for small trial orders ‑ Export documents such as Commercial Invoice, Packing List can be provided.
🔹Contact Us
If you need more excavator spare parts or other construction machinery replacement components, please send your parts list to us. We will offer our best quotation for you quickly.
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