日立 ZAX60 液压主泵 – 中国再制造 (AP2D25 / 4663300)

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1. Các tính năng và lợi ích chính

• Professionally remanufactured to OEM specifications – This AP2D25 series hydraulic main pump (OEM 4663300) 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 AP2D25 tandem axial piston design – The AP2D25 is a variable displacement double (tandem) axial piston pump, combining two independent pumping units in one housing. This design powers the travel, swing, boom, arm, and bucket circuits simultaneously, providing smooth, coordinated operation for your ZAX60 (ZX60) excavator.

• Restored hydraulic power – After remanufacturing, this pump delivers rated working pressure up to 24.5 MPa (≈3,550 psi) and intermittent pressure up to 29.4 MPa (≈4,350 psi). Displacement remains 2 × 25 cm³/rev, restoring the original flow and torque characteristics of your machine.

• 集成功率控制（负载敏感）系统 – 重建后的泵保留了原厂功率控制系统，该系统可使泵的输出与实际工作负载相匹配。这有助于降低燃油消耗、防止发动机熄火，并延长泵和液压系统的使用寿命。集成的先导齿轮泵也已重建，用于为控制回路供油。.

• 直接螺栓固定替换 – The pump’s 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.

• 高性价比的新品替代方案 – A new genuine Hitachi main pump can cost thousands of dollars. Our remanufactured AP2D25 gives you the same fit, form, and function at a significantly lower price, without sacrificing reliability. Each pump is tested on a hydraulic test stand before dispatch.

• 发货前视觉确认 – 在包装前，我们会向您发送实际再制造单元（安装法兰、花键、油口螺纹、整体状况）的详细高清照片。您批准发货后 – 我们绝不盲目发货。.

• Giao hàng nhanh – 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购。.

2. Ứng dụng

The remanufactured AP2D25 hydraulic main pump is ideal for Hitachi ZAX60 (ZX60) excavators used in a variety of demanding job sites:

• 城市建设与公用事业 – Sidewalk repairs, water and gas line trenching, fibre‑optic cable installation, and small‑scale demolition. The rebuilt load‑sensing control adjusts flow to match light‑duty cycles, saving fuel while maintaining precise control.

• 住宅景观美化及泳池开挖 – Pool digs, retaining walls, grading, and drainage work. The tandem pump design allows independent flow to travel and attachment circuits, enabling simultaneous boom and bucket movements without power loss.

• 农业及土地管理 – Drainage ditch cleaning, irrigation trenching, pond maintenance, and fence post hole digging. The restored high‑pressure output provides the tractive force needed for pulling through soft, muddy fields.

• 矿山辅助及采石场维护 – Site cleanup, drainage maintenance, equipment pad grading, and light aggregate handling. Abrasive dust and sharp rock fragments place heavy demands on pump seals and wear components; our remanufacturing process replaces all critical wear parts to withstand these harsh conditions.

• 设备租赁车队维护 – Midi excavators are frequent rental items. A failed main pump stops production. 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.

• 林业与植被清理 – Steep slopes, fallen timber, hidden obstacles. The rebuilt power control system prevents engine stall when sudden load spikes occur, maintaining consistent hydraulic power for attachment operation.

• Road & bridge maintenance – Shoulder repair, guardrail replacement, drainage cleaning, and slope stabilisation. The restored tandem pump allows the operator to reposition the machine while operating the attachment – critical for roadside work with short work windows.

3. Why Choose Hongtengda Parts – Remanufacturing That You Can Trust

At Hongtengda Parts, we have been supplying and remanufacturing hydraulic pumps for excavators since 2001. We know that a main pump failure on your ZAX60 is a production‑stopping event. Our remanufacturing process is not a “clean and reseal” – it is a factory‑grade restoration.

我们的6步再制造流程：

1. 完全拆解 – The pump is stripped down to individual components (cylinder block, piston assemblies, valve plate, swashplate, bearings, shaft, housing).

2. 清洗与裂纹检测 – All parts are cleaned and inspected for cracks or damage. Irreparable castings are scrapped.

3. – 以下部件始终更换为新件，而非重复使用：所有密封件、所有 O 型圈、所有垫片、所有滚子轴承、完整的活塞/滑靴组件、缸体耐磨板和配流盘。 – The following are always replaced with new: all seals, O‑rings, bearings, and gaskets. The cylinder block and valve plate are re‑ground or replaced. Piston assemblies are matched and replaced as a set. The swashplate surface is reconditioned or replaced.

4. – 使用 OEM 扭矩规格重新组装部件。使用千分表验证活塞组件和配流盘接口处的间隙公差。 – Components are reassembled using OEM torque specifications. Clearance tolerances on the cylinder block / valve plate interface are verified.

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 24.5 MPa), flow rate (approx. 110‑120 L/min), case drain leakage (must be within spec), and power control response.

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

为什么我们的再制造泵优于更便宜的“翻新”单元：

• 新轴承和密封件 – Many budget rebuilders reuse old bearings. We do not. All rotating components get new bearings.

• 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.

• Full test report available – Upon request, we provide a test report showing pressure, flow, and case drain measurements.

您不会买到的是： 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 ZAX60.

• 超过25年的行业经验 – 成立于2001年，我们已为日立、卡特彼勒、小松、神钢、沃尔沃、三一及众多其他品牌再制造了数千台泵。.

• Tình trạng hàng tồn kho của mã 90% – AP2D25 series pumps are in stock as remanufactured units, ready for dispatch from our Guangzhou warehouse.

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

• 发货前视觉确认 – 我们从不盲目发货。您在包装前会收到实际单元清晰照片——您确认后，我们发货。.

• Hỗ trợ kỹ thuật – Send us your ZAX60 machine serial number and a photo of the old pump. We confirm compatibility and provide installation guidance within 2 hours.

Send us your Hitachi ZAX60 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.