Use For Caterpillar 330GC Excavator Control Valve Assembly 558-8895 516-9251 5169267 High Quality Control Valve Assembly Construction Machinery Aftermarket Parts Manufacturer

Precisely fit for Caterpillar 330GC, matching part numbers 558-8895/516-9251/5169267, fully aligned with the hydraulic parameters of the whole machine

• System Pressure: The main relief valve setting pressure is 35 MPa (357 kg/cm²), suitable for the high-pressure hydraulic system of the entire machine, ensuring sufficient power output for digging, swing, traveling and other key operations.
• Structure Type: Adopts a slide valve type multi-section main control valve, integrating multiple hydraulic control branches such as digging circuit, swing circuit and traveling circuit, supporting synchronous adjustment of compound actions (e.g., simultaneous boom lifting and bucket tilting).
• Control Method: Equipped with Load-Sensing Control System. Precise hydraulic control of boom lifting/lowering, arm extension/retraction, and machine swing/traveling is realized through the joystick, with fast and sensitive operation response.
• Applicable Models: Custom-made for Caterpillar 330GC excavators, fully matching the hydraulic parameters of its dedicated hydraulic pump, actuators (cylinders, swing motors, travel motors).
• Core Part Numbers: 558-8895 516-9251 5169267 (corresponding to spool/valve body components of different control circuits such as digging circuit and swing circuit).

• Hydraulic system control center: Receives operation commands and precisely regulates the direction, pressure and flow of hydraulic oil
• Drive the whole machine's operation: Supplies pressure to actuators such as boom, arm, bucket, swing and travel
• Coordinate compound actions: Supports synchronous work of multiple actuators to ensure smooth and efficient compound actions
• Hydraulic system protection: Built-in relief/one-way valves prevent overpressure and oil backflow, protecting pumps, cylinders and other components

• Maintenance Guidelines: 
  • To prevent valve core jamming leading to slow single-action operation (valve orifice and filter element need to be cleaned)
  • To prevent solenoid valve coil failure causing the entire vehicle to stop operating (this can be checked by resistance value testing).

Guangzhou Tieqi Engineering Machinery Co., Ltd. ("IRON CAVALRY")

Location & Overview: Strategically located in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport, Tieqi has been a dedicated specialist in engineering machinery hydraulics for nearly 15 years.

Our Core Values

Driven by our core values of "Pragmatism and Progress," we are committed to delivering practical solutions and upholding our responsibilities. This principle-driven approach defines all our operations and client partnerships.

Technical Leadership & Standards

In China's excavator hydraulic assembly sector, our efficient execution and rigorous approach to manufacturing every product to meet over 95% of original performance specifications have built widespread trust.

For large items, we use sturdy plywood crates secured with metal fasteners for added stability. Inside, the products are cushioned with bubble wrap and secured with wooden braces, while special attention is given to protecting vulnerable parts. Externally, the crates are reinforced with high-strength PET plastic strapping and wrapped in highly waterproof black film.