Parker Commercial 890 Series Hydraulic Gear Pump | 890-SFM-075 | 890-SFM-090

The 890 Series high-pressure gear pumps from Chengyuan Hydraulic are heavy-duty bushing-type power components fully compatible with Commercial Shearing / Parker 890 Series standards. Specifically engineered for demanding environments, models like 890-SFM-075-FS2-5502 and 890-SFM-090-FS2-5502 feature a three-piece high-strength ductile iron construction. Every unit undergoes 100% full-load condition testing before shipment to ensure maximum pressure stability and volumetric efficiency in rugged machinery applications, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: 890 Series (Bushing-type Heavy-duty Gear Pump)

• Displacement Range: 31.4 ml/r (075) to 37.7 ml/r (090)

• Rated Operating Pressure: 250 bar (25 MPa)

• Peak Pressure: 275 bar (27.5 MPa)

• Maximum Speed: 2500 – 3000 rpm

• Housing Material: High-strength Ductile Iron (ASTM A536)

• Mounting Flange: SAE B 2-bolt / 4-bolt options

• Shaft Specification: SAE Spline or Keyed shaft

• Sealing Material: High-performance Viton for high-temperature durability

Key Technical Advantages:

• Heavy-Duty Bushing Balance: Utilizes specialized high-conductivity bronze alloy bushings combined with pressure-balanced plates. This design automatically compensates for axial clearances, maintaining over 90% volumetric efficiency even at 25 MPa.

• Three-Piece Ductile Iron Construction: Unlike standard aluminum pumps, the 890 series utilizes a cast-iron structure for superior fatigue strength and shock resistance, preventing housing failure under instantaneous high-pressure spikes.

• Precision Honed Gear Pairs: Gears are forged from premium 8620 alloy steel, followed by carburizing, quenching, and precision honing. Micron-level gear tooth accuracy significantly reduces operational noise and extends bearing life.

• Multi-Stage Capability: The 890 series features robust modularity, allowing for tandem or triple pump configurations via connecting studs to provide independent power for multiple circuits.

Application Areas:

• Dump Truck Hydraulics: Powering hydraulic cylinders for heavy-duty box lifting.

• Construction Machinery: Ideal for auxiliary power circuits in excavators and loaders.

• Refuse Compactors: Providing stable high pressure for waste compression cycles.

• Mining Equipment: Reliable power for mobile equipment in harsh, dusty environments.

Expert Maintenance Tips:

• Cold Start Protocol: In extremely cold weather, idle the engine for 3-5 minutes until the oil temperature reaches above 20°C before high-pressure operation to prevent bushing galling.

• Filtration Standards: As a bushing-type pump, the 890 series is sensitive to particles. A return filter with a precision of 20μm or better is mandatory to maintain system health.

• Alignment Verification: Never use a hammer for installation. Ensure the alignment between the pump shaft and the drive source is within 0.1mm to prevent radial forces from damaging the shaft seal.