Hydraulic cylinders for tractors

Hydraulic cylinders for tractors 

In modern agricultural production, tractors play a vital role, Hydraulic cylinders for tractors as one of the core components of the tractor, but also plays an irreplaceable role. It is like the “muscle” of the tractor, providing powerful and precise power support for all kinds of operations. In the tractor, it mainly undertakes three major tasks.

1.Three major tasks

(1) Power amplification and precise control

The hydraulic system can amplify the driver's operating force dozens of times, for example, the 3-ton hydraulic cylinder only needs 0.5MPa input pressure to output 30kN thrust, significantly improving the efficiency of farming.

Through the electro-hydraulic proportional valve to adjust the flow, realize the millimeter-level control of the lifting speed of the implement, to ensure the consistency of the sowing depth.

(2) Load balance and safety protection

The hydraulic cylinder is equipped with an automatic compensation function, when the implement encounters stones and other obstacles, the pressure can be quickly relieved through the relief valve to avoid overload damage to the mechanical structure.

The multi-point support design of the suspension system can balance the asymmetric load and prevent the tractor from overturning.

(3) Multi-functional adaptation and quick changeover

Standardized interface design (e.g. quick-change couplings) supports quick change of implements.

Stroke-adjustable cylinders are suitable for different operation scenarios, short stroke for light weeding and long stroke for deep plowing.

2. Common faults and deep-rooted causes

(1) Hydraulic system failure

Decline in oil pump efficiency: gear pump clearance exceeds the standard or piston pump flow distribution disk wear, resulting in insufficient oil supply.

Control valve failure: aging relief valve spring, reversing valve spool wear, resulting in oil leakage or pressure instability.

(2) Mechanical system problems

Seal failure: O-ring aging leads to oil leakage from the cylinder, piston rod bending affects the movement accuracy.

Cylinder wear: long-term operation of the cylinder and piston clearance increases, internal leakage increases.

(3) Electrical control abnormality

Solenoid valve failure: coil insulation aging, insufficient suction.

Line problem: aging fracture or short circuit, control signal distortion.

3. Treatment measures

   (1) Hydraulic system repair

Oil pump overhaul: replace worn parts and use ceramic coating technology to improve plunger life.

Control valve optimization: install position sensors, upgrade proportional control valves to improve regulation accuracy.

(2) Mechanical system maintenance

Seal replacement: select high temperature and corrosion-resistant materials and replace them regularly.

Cylinder repair: grind the cylinder, re-match the piston, and restore the sealing performance.

(3) Electrical system upgrade

Control unit modification: Upgrade PLC control system and add fault diagnosis module.

Line maintenance: implement full line insulation testing and increase protection sleeves.

(4) Intelligent monitoring application

Condition monitoring: install oil analysis sensors and vibration monitoring equipment to grasp the cylinder status in real time.

Predictive maintenance: establish digital twins of equipment and formulate personalized maintenance plans.

Hebei Runhe Hydraulic Machinery Co., Ltd is a leading manufacturer specializing in hydraulic system solutions. We manufacture and sell high quality Hydraulic cylinders for tractors, which are in line with international standards and affordable, and enable the harvesters to work efficiently and safely, if you have a need, please contact us.

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