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Rear Cover Trunnion Four Rod Hydraulic Cylinder

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Rear Cover Trunnion Four Rod Hydraulic Cylinder

The rear cover trunnion four rod hydraulic cylinder is a cutting-edge component designed to provide exceptional power, precise control, and unmatched performance in various industrial applications. With its innovative rear cover trunnion design and four rod configuration, this four rod hydraulic cylinder offers enhanced stability, durability, and load-bearing capacity, making it an indispensable asset in demanding hydraulic systems.

Essential Characteristics Of Four Rod Hydraulic Cylinder:

Rear Cover Trunnion Design:

    • The rear cover trunnion design provides a safe and efficient installation solution that ensures reliable operation even under heavy loads and extreme conditions.
    • It simplifies installation and can be easily integrated into various hydraulic systems or equipment.

Four Rod Configuration:

    • The four rod configuration enhances the bearing capacity of the four rod hydraulic cylinder and ensures optimal stability and precise positioning.
    • It enables the four rod hydraulic cylinder to withstand side loads effectively, providing exceptional resistance to torsion and side forces.

High Power Output:

    • This four rod hydraulic cylinder has an impressive power output, allowing it to handle heavy loads easily.
    • It provides superior power and thrust, making it suitable for applications that require a lot of strength and lifting capacity.

Precise Control:

    • The rear cover trunnion four rod hydraulic cylinder provides precise linear motion control to ensure accurate positioning and smooth operation.
    • It provides excellent stroke control, enabling operators to achieve the speed and precision required for specific tasks.

Rear Cover Trunnion Four Rod Hydraulic Cylinder Parameter:

Rear Cover Trunnion Four Rod Hydraulic Cylinder Usage Method:

Mounting and Installation:

    • Consider load requirements and space constraints to determine the appropriate installation location of the hydraulic cylinder within the system or equipment.
    • Make sure the mounting surface is clean, level, and able to support the weight of the cylinder.
    • Place the rear cover trunnions flush with the mounting face and secure them using recommended bolts or fasteners.

Hydraulic Connections:

    • Connect the four rod hydraulic cylinder supply line to the cylinder port to ensure proper sealing to prevent leakage.
    • Follow the manufacturer’s recommendations for the type of hydraulic oil and fill the system to the recommended level.


    • Activate the hydraulic system and control the movement of the cylinder using a hydraulic control valve or other suitable control mechanism.
    • Adjust flow and pressure Settings to achieve the desired speed and force output.
    • Regularly monitor cylinder operation for any signs of abnormal behavior, such as leaks, overheating, or unusual noise.

Maintenance Of Rear Cover Trunnion Four Rod Hydraulic Cylinder:

  1. Regular Inspection:
    • Perform routine visual inspections to check for signs of wear, leaks, or damage.
    • Inspect the rod surface, seals, and mounting connections for any abnormalities and address any issues promptly.
  2. Lubrication:
    • Follow the manufacturer’s guidelines for lubrication intervals and use a recommended lubricant to ensure smooth operation.
    • Apply lubrication to the rod, seals, and other moving parts to minimize friction and extend the cylinder’s lifespan.
  3. Seal Replacement:
    • Over time, seals may wear out and require replacement. If leakage is detected, carefully remove the old seals and install new ones according to the manufacturer’s specifications.

How Do You Rebuild A Hydraulic Cylinder?

Rebuilding a hydraulic cylinder involves disassembling the cylinder, inspecting its components, replacing worn or damaged parts, and reassembling it to restore its functionality. Here’s a general step-by-step guide on how to rebuild a hydraulic cylinder:

  1. Gather the Necessary Tools and Equipment:
    • Before starting the rebuild process, gather the required tools, such as wrenches, pliers, a rubber mallet, a cylinder hone, new seals and O-rings, a seal installation tool, and a hydraulic cylinder repair kit.
  2. Safety Precautions:
    • Ensure the hydraulic system is depressurized and the cylinder is disconnected from any power source.
    • Use appropriate protective equipment (PPE), such as gloves and safety glasses, to protect yourself during the rebuild.
  3. Cylinder Disassembly:
    • Remove the hydraulic cylinder from the equipment or system.
    • Carefully disassemble the cylinder, starting with removing end caps or retaining rings.
    • Release the pressure within the cylinder by retracting the rod fully.
    • Take note of the sequence of the removed components for accurate reassembly.
  4. Component Inspection:
    • Inspect all cylinder components, including the rod, piston, seals, and bearings, for signs of wear, damage, or corrosion.
    • Measure the dimensions of critical components, such as the rod and bore diameter, to ensure they are within specifications.
    • Pay close attention to the condition of seals and O-rings, as they are familiar sources of hydraulic cylinder issues.
  5. Replacement of Worn or Damaged Parts:
    • Replace any seals, O-rings, or other damaged components identified during the inspection.
    • Ensure the replacement parts are compatible with the cylinder model and meet the required specifications.
    • Lubricate the new seals or O-rings with hydraulic oil before installation.
  6. Cylinder Reassembly:
    • Clean all disassembled components thoroughly to remove any dirt or debris.
    • Apply a thin film of hydraulic oil to the components during reassembly to provide lubrication.
    • Follow the manufacturer’s instructions or repair manual to ensure correct fastener reassembly and torque specifications.
  7. Testing and Installation:
    • Once the cylinder is reassembled, test its functionality by applying hydraulic pressure.
    • Check for leaks, abnormal noises, or erratic movements during testing.
    • If the cylinder operates smoothly without issues, it can be reinstalled into the equipment or system.

Capability & Capacity Of Factory:

(1) Assembly

We have a first-class independent research and development assembly platform. The hydraulic cylinder production workshop has four semi-automatic lifting cylinder assembly lines and one automatic tilt cylinder assembly line, with a designed annual production capacity of 1 million pieces. The special cylinder workshop is equipped with various specifications of a semi-automatic cleaning assembly system with a designed annual production capacity of 200,000 and equipped with famous CNC machining equipment, a machining center, a high-precision cylinder processing special equipment, a robot welding machine, an automatic cleaning machine, automatic cylinder assembly machine, and automatic painting production line. Existing critical equipment of more than 300 sets (sets). The optimal allocation and efficient use of equipment resources ensure the accuracy requirements of products and meet the high-quality needs of products.

(2) Machining

The machining shop is equipped with a customized inclined rail turning center, machining center, high-speed honing machine, welding robot, and other related equipment, which can handle the processing of cylinder tubes with a maximum inner diameter of 400mm and a maximum length of 6 meters.

(3) Welding

(4) Painting & coating

With small and medium-sized cylinder automatic water-based paint coating lines, to achieve automatic robot loading and unloading and automatic spraying, the design capacity of 4000 pieces per shift;
We also have a semi-automatic paint production line for large cylinders powered by a power chain, with 60 cases per shift design capacity.

(5) Testing

We have first-class inspection facilities and test beds to ensure that the performance of the cylinder meets the requirements.



We are one of the best light four rod hydraulic cylinder manufacturers. We can offer comprehensive light four rod hydraulic cylinder stock. We also provide corresponding agricultural gearboxes. We have exported our products to clients around the world and earned a good reputation because of our superior product quality and after-sales service. We warmly welcome customers both at home and abroad to contact us to negotiate business, exchange information, and cooperate with us!

Take a Tour of Our VR Factory:

Take a tour of our VR factory with the following

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