Description
HPV145 9257309 Hydraulic Pump Assembly Overview
The HPV145 9257309 Hydraulic Pump Assembly manufactured by Tatan is a heavy-duty tandem variable displacement axial piston pump belonging to our Hydraulic Pump Assembly classification. Engineered specifically for Hitachi ZX300-3, ZX330-3, ZX350-3, and ZX350H-3 30-35 ton heavy mining excavators, swapping to a complete HPV145 9257309 Hydraulic Pump Assembly restores sluggish compound movements, eliminates hydraulic oil overheating, and stops Isuzu 6HK1X engine bogging under high-pressure rock trenching.
Constructed with dual 145 cc/rev rotating groups, hardened bi-metal valve plates, and factory-calibrated negative flow control (NFC) regulators, this complete unit ensures balanced flow division across dual hydraulic circuits and delivers 100% direct mechanical alignment with the 7.8L diesel engine flywheel coupling.
Key Attributes & Parameters for HPV145 9257309 Hydraulic Pump Assembly
| Product Category | Hydraulic Pump Assembly | Warranty | 1 Year / 12 Months |
| Specific Pump Model | Hitachi HPV145 / HPV145-3 Axial Piston Pump | Brand Name | Tatan |
| Compatible Equipment | Hitachi ZX300-3 | ZX330-3 | ZX350-3 | OEM Part Number | HPV145 / 9257309 / 9260886 |
| Rated Working Pressure | 34.3 MPa (343 Bar) / Boost 37.3 MPa | Control System | Negative Flow Control (NFC) & Proportional Regulators |
| Flow Displacement & RPM | 145 cc/rev x 2 Dual Flow @ 1900-2000 RPM (2 x 288 L/min) | Input Drive Spline | Heavy-Duty Involute Spline Shaft for 6HK1 |
| Machinery Test Report | Provided (100% Bench Flow Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Housing Metallurgy | High-Tensile Nodular Cast Iron Body (180kg+) | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Hydraulic Pump | Packaging | Export Reinforced Wooden Box Packaging |
Supported Machinery Brands & Hydraulic Pump Coverage
In addition to Hitachi, Tatan manufactures replacement complete hydraulic pumps, rotary groups, and regulators for leading machinery brands:
Application Scenarios & Buyer Value
When resolving hydraulic pressure drop and sluggish movement with our HPV145 9257309 Hydraulic Pump Assembly, workshops and equipment contractors eliminate repetitive downtime:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Hitachi ZX300-3 Field Pump Swap | Installing the HPV145 9257309 Hydraulic Pump Assembly cuts equipment overhaul downtime by up to 75% compared to trial-and-error field rebuilding. |
| Hydraulic Service Workshops | Avoids the high failure risk of reusing warped swashplate cradles or scored cylinder barrel casings that cause internal bypass under 30-ton rock loads. |
| Quarry & Heavy Earthmoving Fleets | Restores rapid simultaneous boom raising, bucket crowding, and swing rotation without 6HK1 engine stalling under heavy 1.5 m³ trenching loads. |
| Global Heavy Machinery Stockists | Fully bench-tested, export-crated heavy inventory ready for prompt international air express or container shipment. |
HPV145 9257309 Hydraulic Pump Assembly OEM Diagnostic Guide
Use this technical diagnostic guide to identify hydraulic pump faults on your Hitachi ZX300-3 excavator:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Digging speed slows down dramatically when oil heats up | Severe internal oil leakage across scored valve plates and worn piston shoes, dropping flow output and system pressure below 26.0 MPa. | Replace with a complete HPV145 9257309 Hydraulic Pump Assembly. |
| 2. Isuzu 6HK1X engine bogs down or stalls when curling the bucket | Negative flow control (NFC) regulator spool stuck in maximum swashplate angle position, overloading the 7.8L engine under relief pressure. | Inspect regulator pilot pressure signal (3.9 MPa) or swap to a pre-calibrated factory pump assembly. |
| 3. Loud whining noise & pump body pulsation under load | Pump cavitation caused by restricted suction strainer, aerated hydraulic oil, or damaged suction manifold O-ring seals. | Clean suction line, replace hydraulic return filters, bleed pump casing air, and check pump priming before restart. |
| 4. External oil leak from the pump front drive seal | High case-drain backpressure exceeding 0.25 MPa due to clogged case-drain filters, blowing out the front drive shaft oil seal. | Clear case-drain line restrictions, replace case filters, and install a brand new sealed pump assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan hydraulic pump assembly is coated with anti-rust fluid, capped with steel threaded plugs, sealed in heavy waterproof barrier film, and bolted inside an export-grade reinforced wooden crate.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for 3-7 day express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy hydraulic pumps and bulk stock orders.
📦 Export Wooden Cases
Fumigated solid wooden boxes with custom high-density foam inserts to prevent shipping shock.
Quality Control & International Certificates
Tatan hydraulic components are manufactured under ISO 9001 certified quality control systems and strictly comply with CE industrial machinery safety directives.
HPV145 9257309 Hydraulic Pump FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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