Cummins 855 Piston Set 3069212 & 3803344 | NT855 Engine Rebuild Parts
Ensure maximum power output and engine longevity for your Cummins 855 engine with premium piston 3069212 and piston kit 3803344. These precision-engineered components are specifically designed for the legendary NT855 and NTA855 engine platforms—14-liter, inline 6-cylinder diesel engines trusted worldwide in heavy-duty trucks, construction equipment, marine vessels, and power generation applications.
OEM Number
3069212 & 3803344
Genuine Cummins Piston Specifications
The 3803344 piston kit is a complete solution featuring the 3069212 piston body, engineered to meet or exceed original equipment standards.
| Specification | Detail |
|---|---|
| Cross number | 3803344, 3069212 |
| Piston Type | Dual-Ni (Dual Nickel Insert) |
| Ring Configuration | 4-ring design (two compression rings, one intermediate ring, one oil ring) |
| Ring Facing | Chrome facing on both top and second rings |
| Compatible CPLs | 838, 840, 1187, 1352 |
| Engine Series | NT855, NTA855, N855, NT855-C |
Dual-Ni Piston Technology – Cummins Engine Parts
The Dual-Ni (Dual Nickel Insert) piston represents a significant advancement in Cummins 855 engine technology. These pistons feature nickel inserts embedded in both the top and second piston ring grooves, providing superior durability under high-stress operating conditions.
Key Advantages of Dual-Ni Pistons:
✅ Enhanced Ring Groove Durability: Nickel inserts resist wear and prevent ring groove deformation under high combustion pressures
✅ Superior Heat Management: Advanced material composition withstands extreme thermal loads
✅ Extended Service Life: Chrome-faced rings on both top and second grooves reduce friction and wear
✅ High-Performance Compatibility: Specifically designed for piston-cooled AND aftercooled engines
✅ 17:1 Compression Ratio: Optimized for power and fuel efficiency in demanding applications
Important Compatibility Note: Dual-Ni pistons can ONLY be used in engines that are both piston-cooled AND aftercooled. This configuration is essential for proper heat dissipation and piston longevity.
Compatible Engine Platforms – Cummins Engine Parts for Sale
The 3069212 piston and 3803344 kit are compatible with the following Cummins engine models:
| Engine Model | Applications |
|---|---|
| NTA855 | Heavy-duty trucks, industrial equipment, marine propulsion |
| NT855 | Construction machinery, generator sets |
| N855 | Agricultural equipment, compressors |
| NT855-C | CPL 838, 840, 1187, 1352 configurations |
| NT855-G | Generator drive applications |
These engine platforms are widely used in:
- Heavy-Duty Trucks:Â Kenworth, Peterbilt, Freightliner
- Construction:Â Excavators, loaders, bulldozers
- Marine:Â Commercial vessels, workboats
- Power Generation:Â Standby and prime power generators
- Industrial:Â Mining equipment, oil & gas drilling
Why Choose Cummins 855 Pistons?
The Cummins 855 series engine is legendary for its durability, but piston quality directly impacts engine life and performance:
- Combustion Efficiency: The ω-shaped combustion chamber design in the piston crown optimizes fuel-air mixing for complete combustion.
- Heat Dissipation:Â Dual-Ni construction ensures proper thermal management under continuous high-load operation
- Oil Control:Â Precision ring grooves maintain proper lubrication while preventing oil consumption
- Wear Resistance:Â Chrome-faced rings on both top and second positions provide exceptional wear characteristics
Why Choose Multistar Parts Co., Ltd.?
As a specialized supplier of Cummins NT855 engine parts, we offer:
- ✅ Premium Quality: Genuine-grade pistons meeting OEM specifications
- ✅ Extensive Inventory: Comprehensive stock of 3069212, 3803344, and complete rebuild kits
- ✅ Global Logistics: Worldwide shipping to minimize downtime
- ✅ Competitive Pricing: Wholesale rates for fleets, workshops, and distributors
- ✅ Technical Support: Expert assistance for parts identification and CPL verification
- ✅ Quality Assurance: 100% tested components for durability and performance
Installation Tips for Cummins 855 Pistons
When rebuilding your NT855 engine with 3069212 pistons:
- Verify CPL Number:Â Ensure your engine’s Control Parts List (CPL) is compatible with Dual-Ni pistons (838, 840, 1187, 1352).
- Check Cooling System:Â Confirm engine has both piston cooling jets AND aftercooler
- Measure Piston-to-Cylinder Clearance:Â Standard clearance is 0.10-0.15mm for aluminum pistons.
- Verify Ring End Gap:Â Top ring end gap should be 0.25-0.40mm.
- Lubricate During Assembly:Â Use clean engine oil on all moving parts
- Follow Torque Specifications:Â Adhere to factory torque sequences and values
Keep Your Cummins 855 Engine Running Strong
The Cummins NT855 engine has powered industries for decades. Using premium piston 3069212 and piston kit 3803344 ensures your engine delivers the power, efficiency, and reliability your operations demand—whether on the highway, at the job site, or in continuous power generation.
Contact Multistar Parts Co., Ltd. today to order the Cummins 3069212 piston or 3803344 piston kit for your NT855 engine rebuild. Whether you need individual pistons or complete overhaul kits for fleet maintenance, we deliver the quality, reliability, and support your operations demand.
Trust Multistar Parts Co., Ltd. as your dedicated partner for genuine-quality Cummins 855 engine components and rebuild solutions.
About Multistar Parts
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