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Forged Aluminum Engine Piston and Diesel Piston Kit 4376335 with Weight Graded Five-Groove Combustion Bowl for 6B5.9 Excavator
Product Overview
Piston 4376335 is a forged aluminum piston engineered for heavy-duty turbo diesel engines. It is commonly used in the overhaul of large excavators, mining dump trucks, and concrete pump power units.
Key Design Features
Streamlined Combustion Bowl ProfileThe curved inner chamber is calibrated to match the injector spray angle. It creates an organized fuel swirl for efficient combustion, minimizes carbon deposition, and reduces black smoke emission at low engine speeds.
Grain Refinement Treatment on Ring Groove ZonesSpecial heat treatment refines the metal structure around the ring grooves. It boosts surface hardness and fatigue resistance against repeated friction, preserving groove geometry and cylinder sealing performance over long service hours.
Micro-Dimple Oil Storage Texture on SkirtFine recessed pockets on the piston skirt hold a persistent lubricating oil film. This prevents direct metal contact between the skirt and liner and greatly reduces scuffing risk during cold starts.
Double-Radius Transition for Pin Bore EndsSmooth curved transitions on both sides of the wrist pin hole distribute impact stress evenly. This eliminates stress concentration cracks and improves fatigue life under fluctuating heavy vibration loads.
Weight Grading and Sorting InspectionEach piston is weighed precisely and grouped within a tight tolerance. The weight difference between pistons for one engine is strictly limited, ensuring good dynamic balance and lowering engine vibration.
Interchangeability & Assembly
This aftermarket piston offers excellent interchangeability. It can be supplied separately or as a complete set with piston pin, circlips, and rings. When assembled with cylinder liner kits, it delivers durable and stable performance under continuous heavy loads at quarry and construction sites.
Technical Specifications
Part Number
4376335
Matching Piston Body Part No.
5255257
Product Name
Piston Kit
Compatible Engine
6B5.9, 5.9L In-line 6 Cylinder
Bore
102 mm
Stroke
120 mm
Material
Aluminum Alloy Piston + Alloy Cast Iron Piston Rings
Number of Ring Grooves
3 grooves
Kit Includes
Piston, piston pin, circlips, complete piston ring set
Packing Unit
Set (1 set = for one cylinder; 6 sets required for full 6-cylinder engine)
Approx. Net Weight
2.1 kg/set
Outer Carton Size
13 × 7 × 7 cm
Application
Excavators, wheel loaders, trucks, diesel generator sets, overhaul of construction machinery
Interchange Remark
Interchangeable part number for the same engine: 3926631
Product Image
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Importer,Exporter,Trading Company,Seller
Total Annual:
30 million-80 million
Employee Number:
25~50
Ecer Certification:
Verified Supplier
As a premier family-owned enterprise with over 30 years of deep heritage in crankshaft manufacturing and 16 years of strategic global supply chain presence, we are dedicated to heavy-duty engine assemblies, generator sets, and core components. We possess robust, end-to-end supply and delivery ...
As a premier family-owned enterprise with over 30 years of deep heritage in crankshaft manufacturing and 16 years of strategic global supply chain presence, we are dedicated to heavy-duty engine assemblies, generator sets, and core components. We possess robust, end-to-end supply and delivery ...