日立ZAX450-6液压主泵 – 中国再制造（9184686）

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1. คุณสมบัติเด่นและประโยชน์

• Professionally remanufactured to OEM specifications – This main hydraulic pump (OEM 9184686) has been fully disassembled, cleaned, inspected, and rebuilt in our ISO‑certified facility in China. Worn components – cylinder block, piston assemblies, valve plate, swashplate, bearings, seals – are replaced with new, high‑quality parts. The result is a pump that delivers performance and reliability comparable to a new unit at a fraction of the cost.

• Original Hitachi specification for ZAX450‑6 – The 9184686 is the direct replacement for the 40‑ton class ZAX450‑6, ZX450, and related models. It restores the factory hydraulic power, flow, and pressure characteristics that your machine was designed to deliver.

• Tandem variable displacement axial piston design – Two independent pumping sections in one housing power the travel, swing, boom, arm, and bucket circuits simultaneously. This design allows smooth, coordinated operation even under heavy load – no power loss when you need to combine functions.

• Restored flow and pressure – After remanufacturing, this pump delivers rated working pressure of approximately 34–35 MPa (≈4,900–5,100 psi) and a total flow of over 400 L/min (two main sections plus integral gear pump). Your ZAX450‑6 regains full digging force, fast cycle times, and responsive travel.

• Integrated power control (load‑sensing) system – The rebuilt pump retains the factory power control system, which matches pump output to actual working load. This reduces fuel consumption, prevents engine stall, and extends the life of both the pump and the hydraulic system. The integral pilot gear pump is also rebuilt to supply the control circuit.

• 高性价比的全新原厂件替代方案 – A new genuine Hitachi main pump for a 40‑ton excavator is a significant investment. Our remanufactured 9184686 gives you the same fit, form, and function at a much lower price, without sacrificing reliability. Each pump is tested on a hydraulic test stand before dispatch.

• 直接螺栓固定替换 – Mounting flange, drive shaft spline, and hydraulic port configurations are restored to original Hitachi specifications. No modifications, no adapters, no fabrication – your mechanic unbolts the old pump and bolts this one in.

• 发货前目视确认 – Before packing, we send you detailed high‑resolution photographs of the actual remanufactured unit (mounting flange, splines, port threads, general condition). You approve shipment – we never ship blind.

• การจัดส่งที่รวดเร็ว – 从我们广州仓库发货，交货期为5–8个工作日。月供应能力为300台，可接受单件或批量订单。.

2. การสมัคร

The remanufactured Hitachi 9184686 main pump is ideal for ZAX450‑6 and 40‑ton class excavators used in high‑production environments:

• Large‑scale mining & quarrying – 40‑ton excavators are the backbone of many open‑pit mines and aggregate quarries. A pump with restored volumetric efficiency delivers full power all day – faster loading cycles, better fuel economy, and no mid‑shift power fade.

• Heavy civil construction – Dam building, highway excavation, tunnel portal work, and large‑scale earthmoving demand consistent hydraulic power. A remanufactured pump gives you predictable performance at a cost that makes sense for older machines.

• Demolition & scrap recycling – Shock loads and vibration accelerate pump wear. Our remanufacturing process replaces all bearings, seals, and wear plates, restoring the pump‘s ability to survive the most punishing conditions.

• Material handling & port operations – Loading logs, scrap metal, or aggregates requires smooth, responsive hydraulic control. A properly remanufactured pump with factory‑spec tolerances provides that control without the expense of a new unit.

• 设备租赁车队 – Keeping 40‑ton excavators in rental service means minimising downtime. A remanufactured pump offers a predictable service life (3,000–5,000 hours) and allows you to budget for replacements without the shock of a new genuine price tag.

3. 为何选择 ฮงเท็งต้า ชิ้นส่วน – Remanufacturing That Delivers

At Hongtengda Parts, we have been remanufacturing hydraulic pumps for excavators since 2001. We know that a main pump failure on a ZAX450‑6 stops production completely. Our remanufacturing process is not a “clean and reseal” – it is a factory‑grade restoration.

Our 6‑step remanufacturing process:

1. Complete disassembly – The pump is stripped down to individual components: cylinder block, piston assemblies, valve plate, swashplate, bearings, shaft, housing, and control valves.

2. 清洁与裂纹检测 – All parts are thoroughly cleaned and inspected for cracks or damage using dye penetrant testing on critical castings. Irreparable parts are scrapped.

3. 磨损部件更换 – All seals, O‑rings, bearings, and gaskets are replaced with new, high‑quality parts. The cylinder block and valve plate are re‑ground to restore flatness. Piston assemblies are matched as a set and replaced if worn. The swashplate surface is reconditioned or replaced.

4. 精密重新组装 – Components are reassembled using OEM torque specifications. Clearance tolerances on the cylinder block / valve plate interface are verified using dial indicators.

5. 液压测试台验证 – The completed pump is mounted to a test stand and run through its full pressure and flow range. We verify operating pressure (up to 35 MPa), flow rate (400+ L/min total), case drain leakage (must be within spec), and power control response. A test report is available upon request.

6. 最终质量检查与包装 – The pump is painted, fitted with protective port caps, and packed in a heavy‑duty wooden case for export.

Why our remanufactured pump outperforms cheaper “rebuilt” units:

• New bearings and seals – Many budget rebuilders reuse old bearings to save cost. We do not. All rotating components get new bearings – the single most important factor for pump longevity.

• 精密研磨的磨损表面 – The cylinder block and valve plate are re‑ground to restore flatness. A lapped surface is essential for low internal leakage. Without it, the pump will overheat and lose power within weeks.

• Full test report – Upon request, we provide a test report showing pressure, flow, case drain, and temperature measurements. You see the data before you buy.

您所购得的不是： A used pump with new paint and a set of O‑rings. Our remanufactured pump is restored to meet or exceed OEM performance standards – at a price that makes sense for your older ZAX450‑6.

• 超过 25 年的行业经验 – Founded in 2001, we have remanufactured thousands of pumps for Hitachi, Caterpillar, Komatsu, Kobelco, Volvo, SANY, and many other brands.

• 90% มีสินค้าพร้อมจำหน่าย – 9184686 pumps are in stock as remanufactured units, ready for dispatch from our Guangzhou warehouse.

• 24小时发货 – 从我们广州枢纽到您的货代仅需 1 天；国际订单在 24 小时内发货。.

• 发货前目视确认 – We never ship a pump blind. You receive clear photos of the actual unit before packing – you approve, we ship.

• การสนับสนุนทางเทคนิค – Send us your ZAX450‑6 machine serial number and a photo of the old pump. We confirm compatibility and provide installation guidance within 2 hours.

Send us your Hitachi ZAX450‑6 machine serial number and a photo of the old pump – we will verify fitment, provide a quote, and document our pre‑shipment inspection within 24 hours.

Critical installation tip for the 9184686 remanufactured pump:
– 壳体泄油管路 must be clear and unrestricted. A blocked case drain will blow the shaft seal instantly on first startup.
– Before installing the remanufactured pump, flush the entire hydraulic system and replace all filters. Contaminants from the failed pump will destroy a remanufactured unit just as quickly as a new one.
– 在每个液压连接处使用新的 O 型圈和密封垫圈。重复使用密封件必定导致泄漏。.
– After installation, run the engine at low idle for 2–3 minutes with the pump in neutral, then slowly cycle each function (boom, arm, bucket, swing, travel) to purge air from the system.
– 检查泵与发动机飞轮壳的对中情况——不对中会导致轴承过早失效和轴封泄漏。.

保修说明： 保修期为 3 至 6 个月，具体取决于产品详情。. 我们不为原装二手或再制造零件提供保修服务。. 我们的价值在交付前就已体现：精心的再制造、彻底的测试以及发货前的视觉确认。对于需要保修选项的客户，我们可以提供全新的售后市场单元报价——请咨询我们的销售团队。.

The main hydraulic pump is the heart of your ZAX450‑6’s hydraulic system. Our remanufactured 9184686 gives you restored 40‑ton class performance at a cost that keeps your budget intact – not with shortcuts, but with a genuine factory‑grade restoration. Send us your ZAX450‑6 serial number – we will confirm compatibility and provide a quote within 24 hours.