708-1T-00580 Fan Pump For Komatsu PC490-10 excavator

708-1T-00580 Fan Pump For Komatsu PC490-10 excavator Featured Image
  • 708-1T-00580 Fan Pump For Komatsu PC490-10 excavator

Short Description:

708-1T-00540 is a variable displacement axial piston main hydraulic pump developed for Komatsu D51EX and D51PX medium bulldozers.

Product Detail

Product Tags

description

This variable axial piston fan pump adopts temperature feedback proportional control. When machine temperature rises during heavy digging, pump displacement increases to raise fan speed and enhance heat dissipation. When the machine is in light-load standby state, the pump reduces output flow, cutting parasitic power consumption and lowering engine fuel consumption.
The pump housing uses high-rigidity alloy cast iron, optimized structure to resist vibration and rock dust erosion. Internal piston and swash plate assembly are made of wear-resistant alloy with ultra-precise machining, stable volumetric efficiency after thousands of hours of operation. The sealing assembly adopts multi-component fluorine rubber composite seals, resisting high temperature and hydraulic oil degradation.Each finished pump undergoes strict hydraulic bench tests covering temperature response, flow stability and leakage inspection. Original mounting hole layout and oil port position support direct installation without modification.

product parameters

Part No：708-1T-00580
Product Type：Temperature Controlled Variable Axial Piston Fan Pump
Applicable Equipment：Komatsu PC490-10 Large Hydraulic Excavator
Core Technology：Temperature sensing proportional variable control
Theoretical Displacement：28 cc/rev
Rated Working Pressure：20 MPa (200 bar)
Max Instantaneous Peak Pressure：24 MPa (240 bar)
Rated Working Speed：1800 rpm
Max Allowable Speed：2200 rpm
Rated Output Flow：76 L/min
Minimum Idle Flow：16 L/min
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-23℃ ~ +106℃
Sealing Grade：Fluorine composite seal, low internal and external leakage
Main Material：High rigidity alloy cast iron housing, wear-resistant alloy piston & swash plate assembly, fluorine rubber seal kit
Interchangeability：Direct replacement fan pump for Komatsu PC490-10 cooling hydraulic circuit
Net Weight：Approx 15.2KG
Application：Provide hydraulic drive power for cooling fan motor of PC490-10 excavator

Applicable Models

This fan pump is aftermarket replacement spare part, specially matched for the following Komatsu excavator model:
• Komatsu PC490-10

Application Scenarios

708-1T-00580 hydraulic fan pump is developed for heavy-load, dusty and high-temperature construction environments, widely used in PC490-10 excavator working sites:
• Open-pit quarry mining: Rock excavation, ore loading and high-intensity cyclic operation under full load.
• Large earthmoving projects: Mountain cut, foundation excavation and dam construction with long continuous shifts.
• High-temperature tropical and summer construction: Stable cooling performance under strong sunlight and high ambient temperature.
• Hard rock excavation projects: Sustained heat control under high resistance rock breaking conditions.
• Urban large foundation pit works: Long-time continuous operation in confined space with poor heat dissipation.

advantage

• Independent cooling hydraulic circuit, temperature proportional adjustment will not interfere with main excavation hydraulic system.
• High rigidity alloy cast iron body, strong vibration resistance, suitable for mining dusty environment.
• Precision machined swash plate and piston assembly, low wear rate and long service life under cyclic temperature changes.
• Fluorine composite sealing system, excellent high temperature resistance, effectively prevent oil leakage caused by oil aging.
• Smooth flow regulation curve, fan speed changes gradually without sharp fluctuation, reduce fan blade fatigue damage.
• Standard flange and oil port layout, simple field replacement, shorten equipment downtime.
• Complete bench performance verification, stable temperature control performance under continuous heavy excavation.

FAQ 

Q1: Which excavator fits 708-1T-00580 fan pump?
A1: This hydraulic fan pump is designed for Komatsu PC490-10 large excavator. Verify machine serial number before purchase to avoid wrong part selection.

Q2: How does the temperature control function of this fan pump work?
A2: The pump collects temperature signals from engine coolant and hydraulic oil. When temperature rises, it increases displacement and flow to speed up fan. When temperature drops, it reduces flow to save engine power.

Q3: What are typical failure symptoms of this fan pump?
A3: Common problems: Fan fails to accelerate when temperature rises; fan speed fluctuates randomly; abnormal knocking noise from pump body; insufficient flow leading to overheating; pump body oil seepage; slow response during rapid temperature rise.

Q4: What preparation work should be done before pump installation?
A4: Fully flush the cooling hydraulic circuit, replace contaminated hydraulic oil and filter. Check fan motor, relief valve and pipelines for damage or blockage. After assembly, bleed air inside cooling circuit and test temperature control response.

Q5: After fan pump replacement, excavator still overheats, what are the possible causes?
A5: Overheating issue may not be caused by fan pump. Inspect radiator blockage, worn fan motor, deformed fan blade, relief valve pressure drift, trapped air in hydraulic circuit or clogged filter.

our warehouse

our warehouse

Pack and ship

Pack and ship


  • Previous:
  • Next:
    • Write your message here and send it to us

    Products categories