Hitachi ZAX120-6 / ZAX130-5A Main Hydraulic Pump Repair Kit

Description

Product Video

1. Key Features & Benefits

• Genuine OEM-Spec Repair Kit – Manufactured to Hitachi‘s original equipment standards for the HPK055 series main hydraulic pump, used in ZAX120-6, ZAX130-5A, and compatible Zaxis series excavators. This is a brand‑new, factory‑spec repair kit – not an aftermarket substitute.

• Complete Pump Overhaul Solution – This repair kit contains all the essential seals, O‑rings, gaskets, and wear components required for a comprehensive overhaul of the Hitachi HPK055 main hydraulic pump. It provides everything your service technician needs to restore pump performance to factory specifications in a single, convenient package.

• Restores Pump Performance and Efficiency – Over time, seals harden, O‑rings compress, and internal wear components degrade, leading to internal leakage, reduced hydraulic flow, loss of digging power, and increased fuel consumption. Rebuilding the pump with this genuine repair kit restores proper sealing, consistent hydraulic output, and smooth machine operation – bringing your ZAX120-6 or ZAX130-5A back to its original performance.

• Prevents Costly Pump Failure – A hydraulic pump that develops internal leakage will progressively lose efficiency and eventually fail catastrophically. Replacing seals and wear components at the first sign of trouble prevents expensive pump damage and extends the service life of your HPK055 pump.

• Heavy‑Duty Construction for Demanding Applications – All seals and O‑rings in this kit are manufactured from high‑quality materials specifically engineered to withstand the extreme pressures, temperature variations, and contamination common in mining, quarrying, and heavy construction environments.

• Wide Compatibility Across Hitachi Zaxis and ZX Series – This repair kit is compatible with the HPK055 hydraulic pump used in a broad range of Hitachi excavator models, including ZAX120-6, ZX120-6, ZAX130, ZX130-5A, ZX135US, and ZX110 series. The HPK055 pump is specifically designed for the ZAX120-6 model, ensuring a seamless fit and integration into the machine’s hydraulic system.

• Pre‑Shipment Visual Verification – Before packing, we send you detailed high‑resolution photographs of the actual kit (part number markings, seal condition, overall quality). You approve shipment – we never ship blind. Video inspection is also available upon request.

• Fast Delivery – 3–7 working days lead time from our Guangzhou warehouse. Flexible shipping options including DHL, TNT, UPS, FedEx, and sea freight.

2. Technical Specifications

3. Applications

The Hitachi HPK055 main pump repair kit is an essential service component for ZAX120-6 and ZAX130-5A excavators used across a wide range of demanding job sites:

• Urban Construction & Utilities – Sidewalk repairs, water and gas line trenching, and small‑scale demolition in tight urban spaces. The HPK055 pump is designed to handle the precise, responsive hydraulic demands of working near existing structures. This repair kit ensures the pump maintains consistent flow and pressure for delicate operations.

• Residential & Commercial Development – Foundation digging, basement excavation, retaining walls, grading, and site preparation. The HPK055 pump‘s compact design and reliable performance make it ideal for 12–13 ton class excavators working in confined residential spaces. Regular pump maintenance with this genuine repair kit extends service life and prevents unexpected breakdowns.

• Quarrying & Aggregates – Loading trucks, stockpile management, and material handling in abrasive dust conditions. The harsh, dusty environment accelerates seal wear. This genuine repair kit ensures the HPK055 pump maintains consistent pressure and flow, delivering the power needed for efficient loading cycles.

• Equipment Rental Fleet – 12–13 ton excavators are frequently rented machines. A genuine repair kit enables cost‑effective preventive maintenance, extending pump life and avoiding costly mid‑rental breakdowns, towing bills, and customer complaints.

• Forestry & Vegetation Clearance – Steep slopes, fallen timber, and uneven terrain place variable loads on the hydraulic system. The high‑quality seals and O‑rings in this kit are specifically engineered to withstand these extreme conditions, ensuring reliable pump performance.

4. FAQ – Frequently Asked Questions

Q1: Is this repair kit an exact replacement for my Hitachi ZAX120-6 or ZAX130-5A?

A: Yes. This repair kit is designed for the HPK055 series main hydraulic pump used in Hitachi ZAX120-6, ZX120-6, ZAX130, ZX130-5A, and a wide range of compatible Zaxis and ZX series excavators. To confirm compatibility for your specific machine, send us your machine serial number and a photo of the old pump – we will verify within 2 hours.

Q2: What does this repair kit contain?

A: This is a complete seal and wear component kit for the HPK055 main hydraulic pump. It includes all the essential O-rings, oil seals, retaining rings, packing, gaskets, and other wear components required for a comprehensive pump overhaul. All components are manufactured to Hitachi‘s original equipment specifications.

Q3: Is this a genuine OEM repair kit or an aftermarket substitute?

A: It is 100% genuine OEM specification, manufactured to Hitachi‘s original equipment standards. This is not an aftermarket substitute. Genuine OEM parts ensure perfect fit, reliable sealing, and long service life.

Q4: What are the symptoms that indicate my HPK055 pump needs a rebuild?

A: Common symptoms include: reduced hydraulic power and slower cycle times, increased fuel consumption, sluggish machine response, overheating hydraulic oil, visible oil leaks around the pump, or contamination (metal particles) in the hydraulic oil. The HPK055 pump is specifically designed for the ZAX120-6 model; if you notice any of these signs, your pump may need overhauling with this repair kit.

Q5: What is the warranty on this repair kit?

A: The warranty period is 3 months. Please refer to the product details for full warranty terms. For customers who require extended warranty coverage, we can quote aftermarket alternatives – ask our sales team.

Q6: How long does delivery take?

A: Delivery is 3–7 working days after order confirmation. Flexible shipping options including DHL, TNT, UPS, FedEx, and sea freight are available.

Q7: What payment methods do you accept?

A: We accept T/T (wire transfer), Western Union, and PayPal.

Q8: How can I verify the repair kit is genuine before shipping?

A: Before packing, we send you clear, high‑resolution photographs of the actual kit – part number markings, seal condition, and overall quality. You approve shipment only after reviewing these images. We never ship blind. Video inspection is also available upon request