Hitachi ZAX330-3 Main Hydraulic Pump Seal Kit – Specification (4451039)

Description

Product Video

1. Key Features & Benefits

• Genuine OEM-Spec Seal Kit – Manufactured to Hitachi’s original equipment standards for the K5V series main hydraulic pump, used in ZAX330-3, ZAX330-5G, ZX330-3, ZX330-5G, and a wide range of compatible Zaxis and ZX series excavators. This is a brand‑new, factory‑spec repair kit – not an aftermarket substitute.

• Complete Pump Overhaul Solution – This seal kit contains all the essential seals, O-rings, gaskets, and wear components required for a comprehensive overhaul of the Hitachi K5V series 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 seal kit restores proper sealing, consistent hydraulic output, and smooth machine operation – bringing your ZAX330 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 K5V series pump.

• Heavy-Duty Construction for Demanding Applications – All seals and O-rings in this kit are manufactured from high-quality materials including HNBR, PTFE, NBR, PU, ACM, Rubber, and VMQ, 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 seal kit is compatible with the K5V series hydraulic pump used in a broad range of Hitachi excavator models, including ZAX330-3, ZAX330-5G, ZX330-3, ZX330-5G, ZAXIS200LC-3, ZAXIS160, ZAXIS180, ZAXIS190, ZAXIS210, ZAXIS220, ZAXIS225, ZAXIS230, ZAXIS240, ZAXIS250, ZAXIS270, and many other Zaxis and ZX series models.

• 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 – 3–5 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 4451039 seal kit is an essential service component for ZAX330-3 and ZAX330-5G excavators used across a wide range of demanding job sites:

• Large-Scale Open-Pit Mining – ZAX330-3 and ZAX330-5G excavators are 30–36 ton class machines that work 20+ hour shifts in extreme conditions. The K5V series pump operates under continuous high pressure and heavy loads. A failed seal allows hydraulic fluid to leak internally, leading to reduced pump efficiency and eventual catastrophic failure. This genuine seal kit ensures reliable sealing performance in the harshest mining environments.

• Quarrying & Aggregates – Loading trucks, stockpile management, and material handling in granite, limestone, and basalt quarries generate significant dust and vibration. The HNBR, PTFE, NBR, and VMQ materials in this kit provide excellent resistance to abrasion, heat, and contamination, ensuring reliable sealing performance shift after shift.

• Heavy Construction & Infrastructure – Highway excavation, dam building, bridge footings, and large-scale earthmoving projects place sustained high loads on the hydraulic system. The seal kit’s high-quality materials ensure reliable sealing even under continuous heavy operation.

• Equipment Rental Fleet – 30–36 ton excavators are high-value rental assets. A genuine new seal kit enables cost-effective preventive maintenance, extending pump life and avoiding costly mid-rental breakdowns, towing bills, and customer complaints.

• Hydraulic Pump Overhaul & Repair Shops – This seal kit is an essential inventory item for repair shops specializing in Hitachi excavator hydraulic pump overhauls. It provides all the components needed for a complete K5V series pump rebuild in a single, convenient package.

4. Why Choose Hongtengda Parts

Since 2001, Hongtengda Parts has been a leading distributor of earthmoving machinery parts, serving customers across Southeast Asia, the Middle East, Africa, the Americas, and Oceania. Headquartered in Guangzhou’s Zhucun parts hub – one of Asia’s major distribution centres for construction machinery parts – we combine deep inventory, cross-brand knowledge, and reliable global shipping to keep your machines running.

What you get when you order from us:

• 25 years of heavy equipment parts experience – Since 2001, we have been the go-to supplier for repair shops, fleet owners, and wholesalers worldwide. We understand the critical role that seal kits play in hydraulic pump longevity and machine uptime.

• 100% genuine OEM-spec parts – We supply only genuine Hitachi-specification seal kits (4451039), not “compatible” substitutes or generic replacements. You receive a kit that matches the original in every measurable dimension – material quality, seal profiles, and component fitment.

• 90% of our catalog in stock – Your seal kit sits in our Guangzhou warehouse, not in a supplier’s backlog. From seal kits to undercarriage components, most orders are dispatched within 24 hours on fumigated, export-ready pallets.

• One supplier, all parts – Got a serial number, a model code, or just a photo of a worn-out pump? Our specialists cross-reference across Hitachi, Caterpillar, Komatsu, Sany, and 15+ brands to find what you need. OEM, OEM-quality, or hard-to-find older model parts – we handle the search so you don’t have to.

• Pre-shipment verification – We never ship a seal kit blind. You receive clear photos of the actual kit before packing – you approve, we ship. Video inspection is also available upon request. When downtime costs money, we move at your speed.

• After-sales support that works – Three senior technicians review your case together. If it’s a quality issue – we cover it. If not – we still guide you through the fix. We don’t just sell parts; we keep you running. Video technical support and online support are available to assist with any product-related queries or issues.

Send us your Hitachi ZAX330-3 or ZAX330-5G machine serial number and a photo of your old pump – we will confirm compatibility and provide a quote within 24 hours.