Hydraulic-Pump-Assembly-Piston-Pump-05045505.1489.3-1

Short Description:

Direct waterjet supplier and factory, help maintain and solve waterjet technical problems, customize water jet solutions, provide robotic waterjet, 3D abrasive waterjet, as well as waterjet cutter heads parts and waterjet parts for KMT/FLOW/BHDT/TECHNI/RESATO/OMAX waterjet

INQUIRY

Details

Product Name: Hydraulic Pump Assembly / Piston Pump (Part No. 05045505)

Description:
This component is a high-pressure axial piston pump, forming the core of the hydraulic power unit in a waterjet cutting system . As a primary component of the Hydraulic Pump Assembly (20498668), it is responsible for converting the mechanical energy from the electric motor into hydraulic energy (pressurized oil flow) . This pressurized oil is then directed to the intensifier pump to drive its reciprocating motion, ultimately generating the ultra-high pressure water required for cutting .

This pump is a positive displacement type, characterized by high rated pressure, high efficiency, and a compact structure . It is rated for continuous operation in the demanding environment of 60,000–94,000 PSI (approximately 4,137–6,480 bar) waterjet systems and is compatible with major brands including KMT, H2O Jet, and AccuStream. This specific part number is listed in OEM parts diagrams for major assemblies .

Applications:

Serves as the prime mover in the hydraulic power unit, supplying pressurized oil to drive the waterjet intensifier pump .
Converts rotational mechanical torque from the electric motor into hydraulic flow and pressure .
Suitable for 60k–94k ultra-high pressure waterjet intensifier systems.
Used during major pump overhauls or when diagnosing issues such as low pressure or erratic system performance .

Features:

High-Pressure Capability: Engineered for the high-cycle, ultra-high pressure demands of waterjet cutting .
Positive Displacement Design: Provides consistent, predictable flow under varying system pressures .
High Volumetric Efficiency: Designed to minimize internal leakage for stable pressure output.
Durable Construction: Manufactured from high-strength, wear-resistant materials to withstand continuous industrial operation .
Critical System Component: Failure of this pump directly results in the loss of hydraulic pressure and inability to cut .

Maintenance:

Failure Diagnosis (When to Inspect/Replace):

Loss of Cutting Pressure: If the hydraulic system fails to build or maintain rated pressure, the pump may be worn or damaged .
Unusual Noise: Excessive noise, whining, knocking, or rattling from the pump area indicates cavitation, bearing wear, or internal component damage .
Slow or Erratic Intensifier Cycling: The intensifier may cycle slowly or irregularly due to insufficient flow from the pump.
External Leakage: Visible hydraulic oil leaking from the pump shaft seal or body indicates seal failure .
Fluid Contamination: Discovery of metal particles in the hydraulic oil or filters points to internal pump wear .

Inspection and Replacement Guidelines:

Full Depressurization (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, fully depressurize the hydraulic system and high-pressure water circuit, and follow lockout/tagout procedures.
Fluid Cleanliness (Critical): The single most important factor for pump longevity is hydraulic oil cleanliness. Contaminated oil is the leading cause of premature pump wear and failure . Maintain proper filtration and change oil at the manufacturer’s recommended intervals.
Drive Coupling Check: If the motor runs but the pump shaft does not turn, or the pump is not building pressure, inspect the flexible drive coupling (P/N 20498155) between the motor and pump .
Suction Line/Strainer Inspection: Ensure the pump suction line is not kinked or blocked and that the reservoir suction strainer is clean. A clogged suction line causes cavitation, leading to noise and damage .
Bearing Health: The bearings are a critical component. If bearing clearance or damage is suspected, the pump may require professional replacement or factory overhaul .
Cross-Reference Part Numbers: This piston pump (05045505) is Item 1 in the Hydraulic Pump Assembly (20498668), which also includes a gear pump (20498626), O-rings, adapter flanges, and mounting hardware . When replacing, ensure all associated components in the assembly are inspected.