270-5977 Main Control Valve 312D Excavator

• 5,000+ hydraulic models in stock - including obsolete & hard-to-find assemblies.
• 30+ technical specialists verify every part before dispatch - no guesswork, no wrong parts.
• Original New · OEM · Remanufactured - three tiers to matchyour conditions & budget.
• Every hydraulic assembly undergoes load testing before dispatch from our 5,000 m2 factory.
• OEM & ODM customization - by drawing or sample, private label & custom packaging available.

• Ready inventory of over 500 assembly types, providing access to more than 6,000 different parts
• Core products include hydraulic pumps, control valves, travel, and swing assemblies
• Specialization in large mining excavator components and hard-to-find items
• 4,000-square-meter factory equipped for professional manufacturing, precision assembly, and rigorous testing
• Integrated supply chain providing cost-effective, convenient one-stop solutions
  

  
  

About IRON CAVALRY

Guangzhou Tieqi Engineering Machinery Co., Ltd. ("IRON CAVALRY") is strategically located in Guangzhou's Huangpu District, approximately one hour from Baiyun International Airport. With nearly 15 years of specialized experience in engineering machinery hydraulics, we have established ourselves as industry leaders in heavy equipment components.

Our Exhibition

We usually talk about real machines, real replacement problems and the details that need to be checked before a part is shipped. Part numbers, machine fitment, product configuration and delivery are often the most important things for our customers.Meeting customers face to face helps us understand what they really need and recommend a more suitable replacement part.

Packaging & Delivery

For large items, we use sturdy plywood crates secured with metal fasteners. Products are carefully cushioned with bubble wrap and secured with wooden braces. External crate reinforcement includes high-strength PET plastic strapping and waterproof black film to ensure safe transit and delivery.

Maintenance Tips

• Keep hydraulic oil clean: Replace oil and filters according to the manufacturer's schedule.

• Prevent contamination: Clean hydraulic lines and connections before repairs.

• Check for leaks: Inspect seals and fittings regularly.

• Monitor oil temperature: Investigate abnormal overheating promptly.

• Check abnormal movements: Inspect the hydraulic system if movements become slow or unstable.

• Avoid incorrect adjustments: Do not change relief valve settings without the correct specifications.

FAQ Section