Tractor Hydraulics: How the System Is Implemented?

Web Desk event Jan 11 2021 10:57AM visibility 365
Tractor Hydraulics: How the System Is Implemented?

For the agriculture and farming industry, a tractor is something that is most important for performing different agriculture tasks safely and precisely. Mechanizing the agricultural tasks with a tractor will also reduce the manpower requirements and improve the quality of work. Mining and construction are other major industries where tractors are important. Why are tractors popular in these industries? A tractor will generate a high tractive effort(or torque) at slow speeds. With the help of agricultural implements mounted on and towed behind the tractor, agriculture activities like plowing, tilling, spreading fertilizer, clearing bushes, digging, moving heavy objects, harrowing, etc… can be performed.

There are numerous agricultural machinery that employs hydraulics for smooth working. A tractor is one among those that rely on the power of hydraulics. An overview of hydraulic systems in tractors are discussed below.

Just like other heavy vehicles, tractors use hydraulics for steering and braking systems. The hydraulic systems for tractors can also be used to raise or lower heavy agricultural implements attached. A chisel plow mounted to the tractor for plowing the land is a common example of agricultural implements. Based on the requirements, the height of the connected chisel plow can be adjusted. The hydraulics in the tractor is used for performing these actions.

How does tractor hydraulics work? If considering the concept, the working is just like any usual hydraulic system that follows Pascal’s law. An external power source will pressurize the fluid using a pump and this fluid in high pressure will be pumped towards the attached moving parts. Different hydraulic components are used in the tractor hydraulic circuit to prevent contamination, offer accurate control, and smooth operation.

Tractor Hitch Control System

The tractor hitch control system is suitable for attaching and operating agricultural implements to the front or rear and also to operate the tipping trailer. A Three-Point Linkage(3PL) System is used for mounting these implements to the front end of the tractor. Hydraulic lift unit with proportional control valve, cylinder, piston and power linkages; hydraulic pump; fittings; pipings and filters are important parts of the tractor hitch control system. Effortless operation, high efficiency, maximum performance in varying soil conditions, etc… are major features of the hitch control system.

The three-point hitch control system that resembles a triangle or the letter “A” is mostly used for attaching the implements to the tractor by properly orienting the arm position of the hitch. The tractor hitch system includes a front and rear hitch control circuit, and a hitch release and power lift circuit for precisely controlling the function.

Also Read: Tractor Fluid vs Hydraulic Oil

The oil in the reservoir will be pressurized using the hydraulic pump located on the top of the transmission. The pressurized tractor oil will be pumped to the inlet port of the lift through the control valve. Based on the applied input pressure, the height of the attached implements can be adjusted. The 3-point lift control lever and lift arm are connected with the control valve. The opening and closing of the control valve will help the pressurized hydraulic oil to flow in and flow out.

In wet soil conditions, wheel slippage is a serious concern and this can be reduced up to 30% using hydraulic controls. Also, the net energy required by an electrohydraulic hitch control system is 3% less than a mechanical three-point hitch regulation system. Accuracy, greater energy saving, active oscillation damping, pressure-control for weight-transfer, etc… are other benefits of the tractor hitch control system.

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