Standard size main bearing set for Cummins QSL9 engines, providing stable crankshaft support and long service life.
Compatible with OEM 3945917 specification
Designed for Cummins QSL9 diesel engines
STD (standard size) main bearing set
High load capacity with excellent wear resistance
Precision-machined for accurate crankshaft fit
Reduces friction and protects crankshaft journals
Ideal for engine overhaul and rebuild projects
The YNF17890 Main Bearing Set (3945917) is designed for Cummins QSL9 diesel engines and serves as a critical component supporting the crankshaft during engine operation. Installed in the engine block main journals, these bearings maintain precise crankshaft alignment while handling high combustion loads and continuous rotational forces.
Manufactured from high-quality bearing alloy materials with advanced surface treatment, the bearings offer excellent resistance to wear, fatigue, and seizure under heavy-duty operating conditions. Precision dimensions ensure correct oil clearance, stable lubrication, and reduced friction, helping extend engine service life.
Commonly used in construction machinery, generators, and industrial power units, the YNF17890 QSL9 main bearing STD set is a reliable aftermarket solution for professional engine rebuild workshops and maintenance projects requiring dependable performance and durability.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF17890 |
| OEM Reference | 3945917 |
| Product Name | Main Bearing Set |
| Engine Model | Cummins QSL9 |
| Bearing Size | STD (Standard) |
| Position | Crankshaft main journals |
| Material | Bearing alloy (steel-backed) |
| Function | Crankshaft support & friction reduction |
| Condition | New |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Set |
| Shipping Options | Air, Sea, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Cummins QSL9 Diesel Engine | Crankshaft main support during operation |
| Construction Machinery | Heavy-duty engine overhaul and maintenance |
| Industrial Power Equipment | Continuous high-load operation support |
| Generator Sets | Stable engine rotation and durability |
| Engine Rebuild Workshops | Essential part for professional engine rebuilding |
Related Products:
QSL9 Connecting Rod Bearings
QSL9 Thrust Bearings
Complete Engine Overhaul Kits
Crankshafts & Engine Blocks
Engine Gasket Sets
FAQs:
Q: Is this bearing standard size?
A: Yes, this is STD (standard size) main bearing.
Q: Which engine does it fit?
A: Cummins QSL9 diesel engine.
Q: Is it suitable for heavy-duty operation?
A: Yes, designed for construction and industrial applications.
Q: MOQ?
A: 1 set.
The YNF17890 3945917 QSL9 Main Bearing STD provides reliable crankshaft support for heavy-duty diesel engines. With precise dimensions, high load capacity, and excellent wear resistance, it ensures smooth engine operation and extended service life after overhaul. YNF Machinery offers consistent quality, competitive pricing, and worldwide shipping. Contact us today for your best quotation.
YNF Machinery provides Cummins Engine Parts, both Genuine and Aftermarket. [table id=3 /] Contact Us Now
