HPV145 Hydraulic Pump Parts
Fit for Hitachi 300/330/350/360
Cylinder Block / Valve Plate / Piston / Rear Cover / Repair Kit
KYB Travel Motor Spare Parts
For Caterpillar 320GC / 323GC
SPK10/10 Hydraulic Pump Spare Parts
For Caterpillar 200B New Model
HPV145 Hydraulic Pump Parts
Fit for Hitachi 300/330/350/360
Cylinder Block / Valve Plate / Piston / Rear Cover / Repair Kit
Product Overview
HPV145 Hydraulic Pump Spare Parts are precision‑manufactured replacement components specially matched for Hitachi 300, 330, 350, 360 excavators. These parts are core internal wearing parts of the HPV145 Hydraulic piston pump, which serves as the main power source of the whole hydraulic system of large construction Machine. The complete set includes Cylinder Block, Valve Plate, Piston, Rear Cover and Repair Kit, covering all vulnerable components that determine the working performance of the hydraulic pump. Each part is strictly processed according to original dimensional standards, with high‑precision friction pairs, good wear resistance and strong interchangeability. Using genuine matching Hydraulic Pump Spare Parts can effectively restore the volumetric efficiency and pressure output of the Hydraulic piston pump, solve problems such as insufficient power, slow movement and high internal leakage of the Machine, and ensure stable and long‑term operation of the entire hydraulic system.
Technical Specifications
- Applicable Model: HPV145 Hydraulic piston pump, matching Hitachi 300/330/350/360 excavators
- Product Category: Complete set of Hydraulic Pump Spare Parts for main hydraulic pump
- Included Components: Cylinder Block, Valve Plate, Piston assembly, Rear Cover, Seal Repair Kit
- Material: High‑strength alloy cast iron for cylinder block and valve plate, wear‑resistant alloy steel for pistons, high‑quality nitrile rubber and PTFE for sealing parts
- Working Pressure: Adapt to the rated working pressure of HPV145 hydraulic pump, peak pressure up to 350 bar
- Working Medium: Anti‑wear hydraulic oil for mobile construction hydraulic system
- Operating Temperature: -20℃ ~ +85℃
- Feature: Precision grinding of friction surfaces, tight assembly clearance, excellent wear resistance, perfect dimensional matching with original pump body, direct replacement without secondary processing, suitable for heavy‑load working conditions of engineering Machine
Working Principle & Failure Analysis
The HPV145 Hydraulic piston pump relies on the relative movement between pistons, cylinder block and valve plate to realize oil suction and high‑pressure oil discharge. Long‑time heavy‑duty operation will cause wear of these core components, leading to increased internal leakage, decreased output flow and pressure drop of the hydraulic pump. The Rear Bear Cover bears the axial force of the pump shaft, and aging seals in the Repair Kit will cause oil leakage of the hydraulic system. Replacing worn Cylinder Block, Valve Plate and Piston, together with a new Repair Kit, can rebuild the internal sealing performance of the Hydraulic piston pump, restore the normal power supply function of the hydraulic pump, and avoid faults such as weak digging force and unstable walking of the Machine.
Core Advantages
1. Strictly follow OEM size standards, all Hydraulic Pump Spare Parts are perfectly adapted to HPV145 pump body, direct replacement greatly reduces maintenance time of construction Machine.
2. High‑precision machining of friction pairs, strong wear resistance, effectively extend the service life of the Hydraulic piston pump and reduce the failure frequency of the hydraulic system.
3. Complete matching kit, including structural parts and sealing parts, one‑stop solution for overhaul of the main hydraulic pump, avoiding the trouble of purchasing scattered parts.
4. Optimized material formula, resistant to oil pollution and high temperature, suitable for harsh construction site environments, stable performance under continuous heavy‑load operation.
5. Every batch of parts undergoes strict dimensional inspection and pressure matching test, ensuring stable performance after installation and improving the operation reliability of the whole hydraulic system.
Application Range
These HPV145 Hydraulic Pump Spare Parts are special maintenance accessories for the main Hydraulic piston pump of Hitachi large excavators. They are widely used for overhaul, repair and after‑market replacement of Hitachi 300/330/350/360 series engineering Machine. Suitable for machinery repair workshops, maintenance service stations, construction equipment leasing companies and global spare‑parts trading business, providing reliable support for the stable operation of the excavator hydraulic system.

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