Premium 3944158 Cummins 6CT 8.3L flanged main bearing set in stock. High-tensile trimetal construction handles extreme axial loads for Komatsu PC300-6 and Liugong CLG856. Resists thrust surface wear. Global shipping. Request wholesale quote!
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Cummins 6CT 8.3L flanged main bearing set (OEM: 3944158) with high-load trimetal overlay.
Precision-ground for zero-clearance deviation, fitting equipment including Komatsu PC300-6, Liugong CLG856, and Sany SY335 machines.
Professional supply with factory-verified tolerances.
For critical Cummins C Series engine overhauls, the integrity of flanged main bearings is paramount for ensuring sustained reliability and robust performance. Ruich Value offers precision-engineered aftermarket Cummins C flanged main bearings, specifically designed for models such as the 8.3L 6C, 6CTA, and ISC 8.3L. These bearings are fundamental in providing stable crankshaft support, effectively managing axial thrust, and minimizing friction to bolster engine durability and operational longevity.
Our commitment to precision engineering means each flanged bearing delivers optimal load distribution and consistent operation, critical for maintaining the high standards expected from Cummins engines. We partner with auto parts distributors and engine repair workshops, supplying dependable replacement parts that reinforce the engine’s inherent technology leadership and ensure a lasting heritage of power.
| Specification | Value |
|---|---|
| Product Type | Main Bearing Set (Flanged) |
| Material Composition | Trimetal (Steel Back, Copper-Lead Alloy, Babbitt Overlay) |
| Bearing Architecture | Flanged Design (Thrust Control) |
| Engine Platform | Cummins C-Series (8.3L) |
| Surface Coating | Tin-Lead Flash / Anti-Friction Layer |
| Dimensional Tolerance | +/- 0.003mm (Mining Precision) |
| Fatigue Strength | Reinforced Steel Backing |
| OEM Reference | 3944158 |
| Cross Reference | 3939626, 3945958, 3929026 |
| Typical Applications | Komatsu PC300-6, Liugong CLG856, Sany SY335, Dongfeng Trucks |
| Application Category | Heavy Construction Machinery & Mining Haulers |
| Engine Model | Application Field | Typical Equipment Brands & Models |
|---|---|---|
| Cummins 6C / 6CTA 8.3L | Heavy-Duty Trucks & Commercial Vehicles | Dongfeng, Foton, Yutong, King Long (various models) |
| Cummins ISC 8.3L | Buses, Coaches, and Motorhomes | Freightliner Custom Chassis, Blue Bird, Tiffin Motorhomes |
| Cummins C Series | Construction & Industrial Equipment | Case, New Holland, Hyundai (excavators, loaders) |
Ruich Value supplies a dedicated range of Cummins engine bearings, including main bearings, connecting rod bearings, and thrust washers.
Category coverage: ISF2.8; ISF3.8; 4BT; 6BT; 6CT; NT855; KTA19; ISX; QSX.
| Engine Model | Item Name | Part No. |
|---|---|---|
| 6BT / EQBT (5.9L) | Main Bearing | 3929016, 3929021, 3901150, 3901306, (3802070 set), 3927772, 4892114/4892715 |
| B Series (3.9L/4.5L) / QSB | Main Bearing | 3978818 / 3978820 / 3978822 (Set), 3977272 |
| B Series (3.9L/4.5L) / QSB | Connecting Rod Bearing | 3969562, 4893693 |
| EQBTA | CAM Bushing | 3971970, 3901090, 3901170 |
| 4BTA390 | Connecting Rod Bearing | 3901170, 3941476 |
| Cummins C (8.3L) | Main BearingMain Bearing | 3944158 / 15/1163, 3945917 |
| Cummins C (8.3L) | Connecting Rod Bearing | 3950661, 3917430 (Standard) |
| Cummins C (8.3L) | Flanged Bearing | 3944163 |
| Cummins C (8.3L) | CAM Bearing | 3943199, 3945329 |
| Cummins C (8.3L) | CAM Bushing | 3913990 |
| Cummins L (10L) | Main Bearing | 3901590, 3919840, 3926798 |
| Cummins L (10L) | Connecting Rod Bearing | 3966344 / 3950661 |
| Cummins D (B Series) | Flanged Bearing | 3978822 / 24 (Thrust Washer Set) |
| ISDe (Cummins Renault D) | CAM Bearing | D4889112 |
| ISDe (Cummins Renault D) | CAM Bushing | D4890059 |
| ISDe (Cummins Renault D) | Rod Bearing | D4893637 |
| Dongfeng Renault (DCI11) | Main Bearing | D5010295445 (Upper), D5010295446 (Lower) |
| Dongfeng Renault (DCI11) | Connecting Rod Bearing | D5010359940 (Upper), D5010477479 (Lower) |
| Dongfeng Renault (DCI11) | Thrust Washers | D5010295448 / D5010295447 |
| QSZ(ISZ)13 | Main Bearing | 4999939 (Upper), 4999940 (Lower) |
| QSZ(ISZ)13 | Connecting Rod Bearing | 4999948 (Upper), 4999949 (Lower) |
| FOTON CUMMINS (3.8L) | Main Bearing | 4948505/4948506 |
| FOTON CUMMINS (3.8L) | Flanged Bearing (Upper/Lower) | 4948507/4948508 |
| FOTON CUMMINS (3.8L) | Connecting Rod Bearing (Upper/Lower) | 4948509/4949510 |
| FOTON CUMMINS (2.8L) | Main Bearing (Upper/Lower) | 4996250/49966251 |
| FOTON CUMMINS (2.8L) | Flanged Bearing | 4946031 |
| FOTON CUMMINS (2.8L) | Connecting Rod Bearing | 5261124 / 5284535 / 5340181 / 5348887 / 5261125 / 5284537 / 5340182 |
| NT855 (13L/15L) | Main Bearing | 3801260 |
| NT855 (13L/15L) | Connecting Rod Bearing | 214950 |
| NT855 | Thrust Washers (Small Hole) | 203660 |
| N14 (NT743/NH220) | Thrust Washers | 3020557 |
| N14 (NT74) | Main Bearing | 3801260 |
| M11 (LT10) | Main Bearing | 3016770 (Upper), 3016780 (Lower) |
| M11 (LT10) | Thrust Washers | 3016760 (Set), 4025125 (Without Flange) |
| KTA(QSK)19 | Main Bearing | 3016760, AR12270A |
| KTA(QSK)19 | Connecting Rod Bearing | 205840 |
| KTA(QSK)19 | Thrust Washers | 205112 |
| KTA(QSK)38 / KTA(QSK)50 | Main Bearing | 3018210 (Standard Set), AR12250 |
| KTA(QSK)38 / KTA(QSK)50 | Connecting Rod Bearing | 3042390 |
| KTA(QSK)38 / KTA(QSK)50 | Thrust Washers | 3000139 |
| QSX(ISX)15 | Main Bearing | 3678555 (Upper), 3678556 / 3800298 (Upper), 4089139 / 4089405 (Lower) |
| QSX(ISX)15 | Connecting Rod Bearing | 4925971 |
| QSX(ISX)15 | Thrust Washers | 4925975 |
A1: Symptom: Excessive crankshaft end play and metallic debris in the oil. Diagnosis: In construction machines like the PC300-6, the flanged (thrust) surface wears down due to high-load digging cycles or misalignment of the hydraulic torque converter, causing metal-to-metal contact on the thrust face. Solution: Our 3944158 bearing set features a reinforced trimetal thrust face that provides a low-friction barrier, significantly extending service intervals under extreme side-load conditions.
A2: Technical Detail: The main caps must be torqued to specific factory sequences; incorrect sequence leads to bore distortion. Pro-Tip: Before assembly, check the crankshaft thrust face for scoring. Installing the 3944158 flange set against a scored crankshaft surface will cause the new flange surface to overheat and fail within the first 50 engine hours.
A3: Diagnosis: The 8.3L engine requires strict control of crankshaft end play to prevent crankshaft “walk” that can damage the engine block or auxiliary gear train. Our Solution: The 3944158 set integrates the thrust function into the main bearing (flanged design), providing a rigid stop for the crankshaft. This is critical for heavy construction equipment that experiences frequent changes in load and vibration.
Ready to enhance your Cummins C Series engine’s performance and longevity? Contact our sales team for competitive pricing and expert support on our full range of flanged main bearings.
For Any Inquiries, please feel free to contact us, Our sales teams are always glad to support your business