I. Product Positioning & Background
1. XCMG 490 Excavator
• Model: XE490D (XCMG Group's 49-ton hydraulic excavator)
• Applications: Mining operations, large-scale earthmoving projects, infrastructure construction.
• Hydraulic System Features:
• Dual-pump combined flow technology with total flow exceeding400 L/min.
• Independent fan-drive pump for cooling system, ensuring engine and hydraulic oil stability under high-temperature conditions.
2. Parker P1045 Fan Pump
• Manufacturer: Parker Hannifin (Global leader in hydraulic and pneumatic systems)
• Role: Third-party compatible replacement for XCMG's original fan pump, requiring strict matching verification.
• Advantages:
• Proven Parker gear pump technology with extended service life.
• Cost-effective alternative to OEM parts with shorter lead times.
II. Core Specifications of Parker P1045
【表格】
Parameter Description
Model P1045 (Parker P-Series Gear Pump)
Displacement 10.45 cm³/rev (Typical value; verify via product label)
Rated Pressure 250 bar (3,625 psi; meets excavator high-temperature cooling requirements)
Peak Pressure 280 bar (For transient overload conditions)
Speed Range 600–2,200 rpm (Matches excavator engine RPM)
Port Size Typically SAE straight thread (e.g., -12 port for 1.25" thread)
Rotation Clockwise/Counter-clockwise (Must match original pump to avoid installation errors)
Materials Cast iron body + steel gears (High-pressure and impact-resistant)
III. Applications & Operational Principle
1. Cooling System Drive
• The fan pump draws oil from the hydraulic reservoir and delivers high-pressure oil to drive ahydraulic motor, which powers the radiator fan.
• Flow Control: Adjusts pump/motor displacement for stepless fan speed regulation (energy-saving and noise reduction).
2. Typical Replacement Scenarios
• Direct replacement for OEM pumps with leaks, excessive noise, or pressure deficiencies, requiring no pipeline modifications.
• Critical Compatibility Checks:
• Displacement tolerance ≤5%.
• Identical port thread type.
• Matching rotation direction.
IV. Selection & Installation Guidelines
1. Key Matching Parameters
• Displacement: Must align with original pump (e.g., P1045’s 10.45 cm³/rev acceptable for 10.5 cm³/rev OEM pump).
• Pressure Rating: Must exceed or equal OEM pump’s rated pressure (e.g., 250 bar vs. 240 bar).
• Shaft Seal Type: Confirm lip seal or composite seal design (prevents oil leakage).
2. Installation Steps
• Step 1: Drain hydraulic oil and disassemble the original pump (record pipeline orientation).
• Step 2: Clean the mounting surface and apply thread sealant (e.g., Loctite 542).
• Step 3: Align and install with torque per Parker manual (typically 80–100 N·m).
• Step 4: Refill hydraulic oil and verify for leaks/noise during startup.
3. Commissioning Checks
• Run idle for 5 minutes; monitor outlet pressure stability.
• Under load, confirm fan speed correlates with engine water temperature.
V. Replacement Risks & Mitigation
【表格】
Risk Solution
Displacement mismatch Select Parker model with相近排量 (e.g., P1050 for 10.5 cm³/rev OEM pump).
Incompatible port threads Customize adapters (e.g., SAE straight to BSP tapered threads).
Opposite rotation direction Reverse pump orientation or modify piping (requires expert guidance).
Higher noise than OEM pump
Check for suction line cavitation; upgrade filter precision (25μm → 10μm).