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Dongfeng Shaanxi High Quality Truck Engine Piston Parts L9.5 New Numbers 5305838 5303778 4376537 Assembly Truck Parts

Dongfeng Shaanxi High Quality Truck Engine Piston Parts L9.5 New Numbers 5305838 5303778 4376537 Assembly Truck Parts

The Cummins 5305838 Engine Piston is an original equipment (OE) high-performance piston manufactured by Cummins Inc. for medium-to-heavy-duty diesel engines. As a core component of the combustion system, it converts the energy from fuel ignition into mechanical motion via reciprocating movement within the cylinder bore.

Designed specifically for ISL9.5 / ISLe series engines, this piston supports high-power output under extreme thermal and pressure loads — making it ideal for long-haul trucks, construction machinery, power generation units, and heavy-duty buses. Featuring advanced structural design including Alfin-liner ring grooves, omega-shaped combustion bowl, and graphite-coated skirt, the 5305838 ensures excellent durability, efficient combustion, and reduced risk of scuffing or seizure during cold starts.

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Model:
5305838
Brand:
Dongfeng

Product Description

Attribute	Description
Product Name	Engine Piston (Standard Bore)
Application Type	Diesel engine internal combustion component
Material	High-strength forged aluminum alloy with steel-reinforced top land; optional steel skirt variants on select models
Piston Design	Omega-type (ω-shaped) combustion chamber for optimized air-fuel mixing
Ring Groove Reinforcement	Alfin (Aluminum Fin) insert in first ring groove — enhances heat resistance and wear protection at high temperatures
Skirt Coating	Graphite or phosphate coating to reduce friction during startup and prevent "scuffing"
Cooling Feature	Oil cooling gallery under crown; cooled via spray jet from engine block
Weight	Approx. 0.84–1.2 kg (varies slightly by revision and material variant)
Compatibility Standard	Designed for Euro V/VI and China 5/6 emission-compliant engines requiring high injection pressure and EGR integration

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Parameter	Specification
Part Number (OEM)	5305838
Bore Diameter	116.5 mm (STD – Standard Size)
Pin Bore Diameter	~45 mm (standard wrist pin fitment)
Compression Height	Typically ~107–109 mm (exact value depends on crankshaft stroke and application)
Piston Stroke Compatibility	Matches ISL9.5 / ISLe / L9.5 platform specifications
Top Land Design	Reinforced with Alfin insert for improved thermal stability
Combustion Bowl Shape	Omega (ω) profile — promotes swirl and efficient fuel atomization
Surface Treatment	Skirt: Graphite or phosphated anti-friction layer
Thermal Expansion Control	Slotted skirt design with controlled ovality for optimal clearance after warm-up
Dynamic Balance Tolerance	≤ ±5 grams per set (ensures smooth multi-cylinder operation)