日立 EX200-3 液压主泵 – 中国再制造 (9133006)

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1. คุณสมบัติเด่นและประโยชน์

• Factory-spec remanufacturing for EX200-3 – This 9133006 main hydraulic pump 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, and 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 tandem axial piston design – The 9133006 is a variable displacement double (tandem) axial piston pump, combining two independent pumping sections in one housing. This design powers the travel, swing, boom, arm, and bucket circuits simultaneously, providing smooth, coordinated operation for your EX200‑3 (19‑ton class excavator).

• Restored hydraulic power for 20‑ton class work – After remanufacturing, this pump delivers rated working pressure up to 31.9 MPa (≈4,630 psi) and a total flow of approximately 2 × 200 L/min. Your EX200‑3 regains full digging force, fast cycle times, and responsive travel and swing.

• 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. An 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 20‑ton excavator is a significant investment. Our remanufactured 9133006 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 9133006 main pump is ideal for EX200‑3 and 20‑ton class excavators used in a wide range of demanding environments:

• 重型建筑与基础设施 – Highway excavation, dam building, bridge footings, and large‑scale earthmoving. The restored tandem pump delivers simultaneous boom, arm, and travel power without internal leakage – no power fade, no sluggish response.

• 采石与骨料生产 – Loading trucks, stockpile management, and material handling in abrasive dust conditions. New bearings and seals ensure the pump survives where worn units fail.

• 矿山辅助作业 – Site cleanup, road maintenance, drainage works. The pump’s load‑sensing control reduces fuel consumption during light‑duty cycles.

• 拆除与废料处理 – Shock loads and vibration are routine. Our remanufacturing process replaces all wear components, restoring the pump‘s ability to withstand harsh conditions.

• 设备租赁车队 – 20‑ton excavators are rental workhorses. A remanufactured pump offers predictable service life (3,000–5,000 hours) at a cost that makes proactive replacement financially sensible – avoiding costly mid‑rental failures and customer complaints.

• 林业与土地清理 – Steep slopes, fallen timber, hidden obstacles. The integral power control prevents engine stall under sudden load spikes.

3. Maintenance Tips – Extend the Life of Your Remanufactured Pump

A properly installed and maintained pump can deliver years of reliable service. Follow these tips to protect your investment:

• Replace hydraulic filters on schedule – Contaminated oil is the #1 killer of hydraulic pumps. Use genuine or high‑quality filters and change them at Hitachi‑recommended intervals (typically 500–1,000 hours). A clogged or bypassing filter allows debris to score the cylinder block and valve plate.

• Keep oil clean and at the correct viscosity – Use ISO VG 46 for normal temperatures, ISO VG 68 for hot climates or continuous heavy duty. Water contamination degrades oil and causes internal rust. Have your oil analysed annually.

• Warm up the pump before heavy work – Run the engine at low idle for 3–5 minutes, then cycle all hydraulic functions slowly without load. This allows oil to reach all internal components and prevents cavitation damage.

• Monitor case drain flow – Excessive case drain leakage (more than 15–20 L/min) indicates internal wear. Measure it every 1,000 hours. A sudden increase signals impending failure.

• ฟังเสียงผิดปกติ – Knocking, whining, or squealing from the pump area often indicates cavitation (starved suction), worn bearings, or loose mounting. Investigate immediately – continued operation will cause catastrophic failure.

• Check pump alignment – Misalignment between the pump and engine flywheel housing puts side load on the shaft, destroying bearings and the shaft seal. After any engine or pump removal, verify alignment with a dial indicator.

• Keep the case drain line clear – A kinked or blocked case drain line will cause back pressure inside the pump housing, blowing the shaft seal. Inspect the line whenever you service the pump.

• Store spare pumps properly – Keep remanufactured pumps in their original wooden case, in a dry, clean environment. Rotate the shaft by hand every 6 months to redistribute internal lubricant.

• Use new O‑rings and sealing washers – When installing a remanufactured pump, always replace all seals on hydraulic connections. Reused seals are the most common source of external leaks.

• Bleed air after installation – After fitting the pump, run the engine at low idle and slowly cycle each function several times to purge trapped air. Air in the system causes cavitation and noisy operation.

• Keep a service log – Record installation date, hours, oil changes, and any unusual observations. This helps you anticipate pump life and avoid unexpected downtime.

Critical installation tip for the 9133006 remanufactured pump:
– 壳体泄油管路 must be unrestricted. A blocked 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.
– Use new O‑rings and sealing washers on every hydraulic connection.
– After installation, idle for 2–3 minutes, then slowly cycle each function to purge air.
– Check pump alignment with the engine flywheel housing – misalignment causes premature bearing failure.

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。.

Send us your Hitachi EX200‑3 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.