Reliable engine performance starts with precision-engineered internal components. If you are searching for a high-quality 6110-21-2212 (also identified as 6110212212) for your maintenance, you have come to the right place. This crankshaft main bearing is specifically designed for the Komatsu 4D120 and S4D120 diesel engine series, ensuring perfect fitment and durable operation under heavy workloads.
| Field | Details |
|---|---|
| Model NO. | Komatsu 4D120 / S4D120 / 4D120-1 |
| Part Number | 6110-21-2212 (6110212212) |
| Product Name | Engine Main Bearing / Crankshaft Bearing Shell |
| Type | Internal Engine Parts |
| Condition | Brand New, OEM Standard Replacement |
| MOQ | 1 Piece |
| Application | Engine rebuild, overhaul, maintenance for construction machinery |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | Express (DHL, Fedex, EMS, UPS), Air, or Sea Freight |
| Stock Status | In Stock / Fast Dispatch |
| Key Procurement Factors | Our Replacement Standard | Common Aftermarket Risks |
|---|---|---|
| 1. Material Composition | High-load Tri-metal Alloy (Steel/Copper/Lead) | Inferior Aluminum alloys with low heat resistance |
| 2. Dimensional Precision | Strict OEM Tolerance (+/- 0.005mm) | Incorrect clearance leading to oil pressure drops |
| 3. Wear Resistance | Reinforced anti-friction surface coating | Rapid thinning causing premature engine seizure |
| 4. Thermal Stability | Engineered for high-temperature diesel cycles | Deformation under heavy load operations |
| 5. Supply Chain | Direct factory sourcing with fast global shipping | Multiple middle-men with long lead times |
| 6. Quality Assurance | 100% inspection before export packaging | Inconsistent quality between batches |
OEM-standard tri-metal structure: Ensures maximum durability and load-carrying capacity for industrial engines.
Trusted by repair shops & equipment fleets: Our parts are field-tested in harsh environments across mining and construction sectors.
Our team helps operators:
Identify potential risks during maintenance
Recommend suitable replacement parts if needed
Support both inspection advice and parts supply
Q: What are the signs that my 4D120 engine needs a 6110-21-2212 bearing replacement?
A: Common indicators include low oil pressure, metallic knocking sounds from the lower engine block, and copper flakes found in the oil filter. Replacing bearings early prevents catastrophic crankshaft damage during an overhaul.
Q: Can the 6110212212 fit other engine models?
A: While primarily designed for the Komatsu 4D120 series, it is essential to verify your specific engine serial number. We provide cross-reference support to ensure you receive the correct specification for your rebuild.
Q: How to prevent premature bearing wear in S4D120 engines?
A: Ensure high-quality oil filtration, maintain proper oil levels, and avoid prolonged idling. Using our OEM-standard replacements ensures the bearing can withstand the pressures of modern diesel performance.
We specialize in delivering high-performance engine solutions. Our core inventory focuses on world-class brands including Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai. From complete engine assemblies to minute components, we provide everything needed for a professional repair.
Our main product range includes: Cylinder Liners, Pistons, Piston Rings, Main Bearings, Connecting Rod Bearings, Thrust Washers, Overhaul Gasket Kits, Fuel Injection Pumps, Injectors, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, Cylinder Heads, and Connecting Rods.
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