9151724 ASSY;PISTON for Hitachi ZX460LCH-AMS/6WG1T
- Product Number: 9151724
- Product Name: ASSY;PISTON
- Machine Model: ZX460LCH-AMS
- Engine Model: 4BG1,6SD1,4JG1,6BG1,6HK1,4BG1,6WG1,4JG1
- Weight: 0.08KG
Compatible Machine Models:EX150LC-5,EX210H-5,EX225USR(LC),EX230K-5,ZX450H,ZX480MTH,EX1200-5,ZX800,ZX850H,EX1200-5C,ZX70,ZX80LCK,ZX75UR,ZX110,ZX200,ZX225US,EX385USR,ZX330,ZX350H,ZX370MTH,ZX130K,ZX130K,ZX135UR,EX350H-5HHE
product details
Description
| Part Name | ASSY;PISTON |
| Part Number | 9151724 |
| Brand Name | HITACHI |
| Place of Origin | Japan |
| Delivery Time | 1-3 work days |
| Packaging Type | Cartons |
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In the heart of Hitachi excavators and bulldozers—whether it's the plunger of a hydraulic pump or the piston of an engine—these components move back and forth at high speed thousands of times per minute, converting hydraulic or thermal energy into the tremendous power that drives the equipment forward and enables digging. The clearance between the piston and cylinder is only a few microns, yet it determines the overall power output efficiency of the entire machine. When the piston surface wears or gets scratched, increasing the clearance, high-pressure oil begins to 'leak' through the gaps—hydraulic pump output drops, making digging weak; engine compression decreases, causing a power drop. When piston rings seize or break, it can lead to catastrophic failures such as scuffing or seizure. Those overlooked piston assemblies, once they 'lose power,' can instantly turn the entire equipment's power system into an 'empty shell.' | |
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Alloy steel material, combining strength and flexibility: The pistons of Hitachi original hydraulic pumps are made of heat-treated alloy steel and undergo strict tempering and surface hardening processes. The core maintains good toughness to absorb impact loads, while the surface has extremely high hardness to resist wear. For pistons in large excavator hydraulic pumps (such as the HPV050 and HPV145 series), this material choice ensures that under high-pressure impacts above 35 MPa, the pistons do not deform or crack, allowing stable operation for tens of thousands of hours.
Precision machining, mirror-smooth finish: Each Hitachi original piston is precision CNC ground, with cylindricity and roundness tolerances controlled at the micron level, and a surface roughness as low as Ra0.2μm–Ra0.4μm. This mirror-like finish forms a perfect clearance fit with the cylinder bore, ensuring the piston moves smoothly while minimizing internal leakage. For engine pistons, the skirt has a specially contoured design that forms a stable lubricating oil film with the cylinder wall, maintaining smooth sliding even under high temperature and high pressure. Piston ring set, triple sealing: Hitachi original engine piston assemblies typically come with three piston rings—the top ring, second ring, and oil ring—each serving a specific function. The top ring is chrome-plated or nitrided for high-temperature and wear resistance, withstanding high pressure in the combustion chamber; the second ring provides auxiliary sealing and oil scraping; the oil ring controls the thickness of the lubricating oil film on the cylinder wall, reducing oil consumption. The openings of the three rings are staggered to create a labyrinth seal, minimizing blow-by of combustion gases and oil upward leakage. |
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In the repair market, counterfeit pistons often cut corners in materials and craftsmanship—they use unknown alloy steel, have improper heat treatment, and wear out or get scratched within a few hours; piston rings lack sufficient elasticity, causing sealing failure, gas and oil leakage; low dimensional accuracy and excessive clearance lead to severe internal leakage. Hitachi genuine piston assemblies strictly follow the original factory specifications for material grades, heat treatment standards, and dimensional tolerances. From hydraulic pump plungers just a few centimeters long to engine pistons dozens of centimeters long, every piece undergoes rigorous factory testing. Choosing a genuine piston assembly means implanting the most reliable 'beating rhythm' into your equipment’s 'power heart,' ensuring every compression is strong and every output is full of energy. |
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The Ownership Of The Products Belongs To Guangzhou Qicheng Machinery Equipment Co., Ltd.