High-Quality Caterpillar 320GC Hydraulic Pump Small Disc 931-9885 for Excavator Main Pump Construction Equipment Part

High-quality replacement hydraulic pump small disc designed for Caterpillar 320GC excavator main pumps and construction equipment.

The system senses load changes in real time via a pressure compensation valve and automatically adjusts pump displacement, reducing energy loss and achieving 15%-20% energy savings compared to traditional fixed displacement pump systems.

When both pumps operate simultaneously, the system automatically balances power distribution between them, ensuring the engine operates under optimal conditions.

The pump body is made of high-strength cast iron, and the plunger surface undergoes carburizing and quenching treatment, achieving a hardness of HRC60 or higher. Combined with a ceramic-coated swashplate, the service life can reach over 8000 hours.

The pump provides power to the excavator's hydraulic system, ensuring normal operation of all actuators (boom, stick, and bucket). Performance directly affects excavator operating efficiency and stability.

The pump's output flow rate can be adjusted by turning the adjusting screw. Turning the screw 1/4 turn changes the flow rate by approximately 19 L/min (5.0 US GPM) to meet different operating condition requirements.

Automatically adjusts output pressure according to system pressure changes, ensuring stable hydraulic system operation and preventing malfunctions caused by excessively high or low pressure.

Guangzhou Tieqi Construction Machinery Co., Ltd. has specialized in engineering machinery hydraulics for nearly 15 years, strategically located in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport.

Our Capabilities

• Ready inventory of over 500 assembly types with access to 6,000+ different parts
• Specialization in hydraulic pumps, control valves, travel, and swing assemblies
• Distinct advantage in large mining excavator components and hard-to-find items
• 4,000-square-meter factory equipped for professional manufacturing and testing

Our packaging includes sturdy plywood crates with metal fasteners, internal bubble wrap cushioning, wooden braces, high-strength PET plastic strapping, and waterproof black film to ensure safe delivery.

• One-stop solution provider for hydraulic components
• High-quality products at competitive prices
• Exceptional customer service
• Large inventory with short delivery times
• Long warranty periods
• Professional expertise in excavator components