Hydraulic Filtration in Agricultural Machinery
Agricultural machinery uses a range of hydraulic systems to perform essential functions such as lifting and moving implements, steering and, in some cases, hydrostatic transmission. In these applications, hydraulic filtration plays an important role in keeping the fluid in the condition required by the system and protecting components from contaminants.
For agricultural vehicles, this is particularly important given the environments in which they operate, where dust, debris, water and other forms of contamination can enter the system and compromise component performance over time.
The role of filtration in the hydraulic systems of agricultural machinery
Contaminants in the fluid can contribute to component wear and affect system performance and reliability. Filtration helps reduce the presence of particles and impurities, maintaining the level of cleanliness required by the circuit.
In agricultural machinery, the choice of filtration system is therefore closely linked to the characteristics of the system, the components to be protected and the conditions in which the machine is used.
There is no single filtration solution suitable for every application: filter location, fluid characteristics, operating conditions and contamination levels all need to be considered when designing the system.
Hydraulic systems in agricultural machinery
Agricultural machinery can incorporate several hydraulic systems, each designed to perform specific functions. In tractors, for example, hydraulics are used for the hydraulic lift, power steering, hydrostatic transmission and operation of agricultural implements.
Lifting systems
Hydraulic lifting systems allow agricultural implements to be moved and controlled and are one of the main applications of hydraulics in the sector. In these applications, fluid quality and effective filtration help protect components and maintain system efficiency
Steering systems
Hydraulics are also used in power steering systems. Filtration helps protect pumps, valves and other circuit components from contaminant particles that could impair their operation
Hydrostatic transmissions
In some agricultural machines, hydraulics are also used for hydrostatic transmission. These systems may use combined return and suction filters, which integrate both functions into a single solution and can help simplify the system and reduce installation space
Hydraulic systems for implements
Hydraulics are also used to power agricultural implements and auxiliary machine functions. Filtration requirements may vary according to the application, the components involved and the operating conditions.
Operating conditions and contamination
One of the defining characteristics of agricultural applications is the environment in which the machines operate. Dust, soil, water and other contaminant particles can come into contact with the machine and contribute to fluid contamination.
These external factors may be accompanied by contaminants generated within the circuit, for example as a result of component wear or fluid deterioration. Contaminants can affect system performance and contribute to wear, making it important to maintain the fluid at the cleanliness level required by the application.
Contamination management therefore involves more than filtration alone; it also includes proper system maintenance. Regular replacement of filter elements and monitoring fluid condition can help maintain system efficiency over time and prevent contamination-related problems.
Which filters are used in agricultural machinery?
The position of the filter within the circuit largely determines its function. The main solutions used in hydraulic systems include suction filters, return-line filters, combined return/suction filters and high-pressure in-line filters.
Suction filters
Suction filters are installed on the line upstream of the pump and are designed to protect it from contamination in the fluid. Their configuration must take into account circuit characteristics and the pump’s protection requirements.
Return filters
Return filters are installed on the return line and retain impurities in the fluid before it flows back into the tank. This helps keep the oil in the circuit cleaner.
In-line and pressure filters
In-line filters can be installed at different points in the circuit, depending on system characteristics and the required level of protection.
High-pressure filters are installed downstream of the pump and protect sensitive components located along the pressure line. MP Filtri offers several solutions for mobile and agricultural applications, including FMM, FMMX and FHP.
Combined return/suction filters
Some solutions combine return-line and suction filtration in a single housing, with two separate lines. This configuration is particularly suitable for hydrostatic transmissions and can help simplify the system and reduce installation space.
For this type of application, MP Filtri offers solutions such as MRSX and LMP 124, both available for agricultural and forestry applications
How do you choose the right filtration solution?
Filter selection should start with the characteristics of the application and circuit. Factors to consider include the type of fluid, flow rate, pressure, environmental and operating conditions, the level and type of contamination, and the sensitivity of the components to be protected.
The filter element must also be selected according to the application’s requirements. Correct system sizing helps achieve the required level of protection while taking the circuit’s operating characteristics into account.
MP Filtri solutions for agriculture
Hydraulic filtration is therefore important for ensuring the reliability, performance and service life of hydraulic systems in agricultural machinery. Filters and filter elements should be selected by considering the circuit characteristics, operating conditions, fluid type and level of contamination expected in the application.
MP Filtri offers a range of solutions for hydraulic filtration, contamination control and power transmission for the agricultural sector, including different types of filters and filter elements designed to meet the needs of hydraulic systems in mobile machinery.
Discover MP Filtri solutions for agricultural and forestry machinery.
