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Engine parts for construction machinery

Construction machinery engine components include the crankshaft, piston, piston rings, bearings, gaskets, and cylinder head, ensuring stable engine operation. These parts are made of hardened alloy steel, heat-resistant aluminum, or cast iron with tensile strength from 250 to 800 MPa. Each component is precision machined and heat treated—such as hardening, stress relief, and anti-wear coating—to provide high thermal and fatigue resistance. Dimensional accuracy is controlled within 0.02–0.08 mm for optimal sealing, force transfer, and lubrication.

Components include compression and oil rings to reduce friction, full gaskets to prevent fluid and gas leakage, and bearings supporting axial and radial loads. Modular design and easy installation allow rapid on-site replacement. Surfaces are protected with corrosion-resistant and anti-wear coatings, extending engine life beyond 5000 hours. This structure improves combustion efficiency, reduces fuel consumption, and ensures stable performance in heavy diesel and gasoline engines.


Original-Komatsu	021-55422386-55422387

Hatz-yadak

Iran

021-55413799

engine parts

Construction machinery engine parts include pistons, crankshafts, connecting rods, valves, gaskets, and cylinder blocks, designed for diesel engines with 100–500 horsepower. Pistons and crankshafts are made of alloy steel and aluminum with surface hardness of 55–60 HRC and tensile strength of 800–1200 MPa. Connecting rods are heat-treated and annealed to withstand dynamic pressures of 200–400 bar. Valves and springs are made of chrome-moly steel, capable of operating at temperatures up to 600°C.

Structurally, the cylinder block is designed with high-pressure oil channels and precision ISO H7 bearings. Cylinder head gaskets and O-rings are made of heat- and pressure-resistant materials. Engine parts are statically and dynamically balanced to reduce vibration, increase efficiency, and provide a service life of up to 10,000 working hours. This design ensures stable performance, optimal power transmission, and industrial durability for bulldozers, excavators, loaders, and graders.


Hatz-yadak	021-55413799

Original-Komatsu

Iran

021-55422386-55422387

Komatsu excavator engine parts

Komatsu excavator engine spare parts include pistons, rings, connecting rods, crankshaft, cylinder head, valves, and fuel injection components that ensure diesel engine performance. Parts are typically made of alloy steel and hardened aluminum, tolerating cylinder pressures up to 200 bar and operating temperatures up to 950°C. Pistons and rings undergo heat treatment and surface hardening, providing a lifespan of over 4000 working hours. The fuel injection system delivers fuel with 0.01 ml precision, optimizing engine efficiency and fuel consumption.

Engine components also include oil and fuel filters, O-rings, PTFE gaskets, and timing belts to prevent leaks and wear. Crankshaft and connecting rod bearings with proper seals withstand axial and radial loads up to 15 tons. Standardized modular design allows rapid on-site replacement, minimizing machine downtime and extending overall excavator life. These spare parts are optimized for Komatsu excavator models PC200 to PC350.