Kawasaki K3V63DT, K3V112DT, K3V140DT, K3V180DT Excavator Parts - Cylinder Block Plungers

1. Product Overview

This product isKawasaki K3V/K5V series swashplate axial piston pumpsofCore heart componentsMainly includesCylinder BlockandPlungersThese components are the friction pairs with the heaviest load and the most severe wear in the hydraulic pump, and their condition directly determines the pump's output pressure and flow efficiency.

2. Core Component Details

• Cylinder block (nine-hole disc)：

  • MaterialIt is usually made of high-lead bronze or special copper alloy, which has good anti-galling and wear resistance.

  • processThe inner hole is honed with high precision, resulting in a very small clearance (micron level) between it and the plunger, ensuring a tight seal; the end face is mirror-polished to fit closely with the distribution plate.

• Piston：

  • MaterialHigh-strength alloy steel with surface treated by high-frequency quenching or carburizing, resulting in extremely high hardness.

  • processThe spherical or cylindrical surfaces are ultra-precision machined to ensure flexible reciprocating motion within the cylinder without leakage.

3. Core Features

• Original factory manufacturing standardsProduction is strictly in accordance with the materials, heat treatment hardness (usually HRC 58-62), and dimensional tolerances specified in Kawasaki's original drawings to ensure perfect interchangeability with the original pump body.

• Excellent wear resistanceMaterials have been optimized for Chinese working conditions (such as high siltation and poor oil quality), significantly extending service life.

• Complete precision matchingThe cylinder block and plunger are selected and matched as a set of components to ensure that the mating clearance of each pair of friction pairs is consistent, and to avoid premature wear or internal leakage caused by improper clearance.

• Wide compatibilityWidely used in 30-40 ton excavatorsmain pumpThis accessory is available for major brands such as Hyundai, Doosan, Kobelco, and Volvo.