Electro-Hydraulic Control Solutions for Tractors

HydraForce hydraulic controls can enhance the capabilities of any tractor – from top-of-the-line models equipped with the latest and most sophisticated options to basic ones that get the job done.


With our comprehensive line of cartridge valves, manifolds, and high-performance electronic controls, our solutions can save you time, money, and improve the quality of your work.


Learn more about our innovative suspension solutions, industry-leading fan control products, and efficient powertrain solutions.



Benefits of Electro-Hydraulic Control Solutions for Tractors

From horse-pulled plows to modern tractors, the farming industry has benefited greatly from the evolution of technology. Electro-hydraulic control systems are the latest innovation that offers a wide range of benefits, such as:

  • Improving efficiencies
  • Removing repetitive tractor control actions from the workload of the operator.
  • Quieter and cooler running equipmentIncreased equipment lifespan
  • Decreased maintenance costs
  • Maximize profits


Relevant Areas Used in Tractors

  • Variable flow pump controls
  • Fuel and oil controls
  • Engine brake controls.
  • Transmission controls
  • SGR/EGR emission and exhaust controls
  • Variable speed fan controls
  • Hydraulic cooling system control
  • Roll stabilization
  • Steering systems
  • Turbocharger controls



Application Details

Transmission and PTO Solutions

  • Clutch engage / disengage, Power Shift
  • Accurate clutch pressure control
  • Lubrication pressure control
  • Main system pressure regulation
  • Diff. Lock engage / disengage
  • PTO control


The circuit shown has a nominal flow rate of 114 lpm/30 gpm with a main system relief valve.


  • Drop-In Valves Proportional Pressure Control Optimizes Clutch
    Engagement and Lube Oil Cooler Performance
  • Modulating Valve Concept - For Soft and Modulated Engagement of
    Mechanical Operated Clutches



Optimize tractor powertrain systems with hydraulic cartridge valves and manifolds with programmable controllers.

Fan Drive Solutions

• Flow rates up to 190 lpm (50 gpm)
• Fail safe high or low
• Preconfigured controls available
• Reduce horsepower consumption by up to 30%


Control valves with multiple temperature inputs can be used to provide variable fan speed control depending on air temperature, load, and cooling requirements. If the radiator gets clogged, two-position, four-way solenoid valves can automatically reverse fan direction.

Electronic control of the hydraulic cooling system can be achieved using either an EFDR1 programmable valve driver or a CoreTek™ controller (ECU).

How it works:

Hydro-pneumatic Suspension Diagram In a hydro-pneumatic suspension system, a cylinder and accumulator replace the torsion or leaf spring. The accumulator acts as the spring and, with restrictions for oil flow, damping can be accomplished.


Basic Suspension Solution

This basic hydro-pneumatic suspension system is idea for cabin or seat suspension or for tractors with a small axle load range.

• Single or double acting cylinder
• Accumulator
• Level control manifold
• Cartridge valves • Pressure ratio 1:3 between empty and max
   loaded axle

Advanced Suspension Solution

• Double-acting system
• Independent accumulators for cylinder piston and rod side
• Constant or variable pressure on rod side
• Integral sensors
• Software developement
• Pressure ratio of more than 1:20 between empty and max
  loaded axle


Suspension Options — Damping and Lockout

Sometimes it is desirable to lock out the suspension. This can be accomplished with a lock-out manifold that can be used to over-damp the suspension or completely lock the connection between the hydraulic cylinder and accumulator.


With an intelligent control algorithm in combination with a proportional valve which acts as a variable orifice to restrict oil flow between the cylinder and accumulator, a semi-active suspension system can be created.


Dual Accumulator Charging

Primary Steering and Brake Solution

• Dynamic Accumulator Charging Circuits
  used in conjunction with steering and
  braking units
— Primary Flow to the brake section of
     the circuit
— Auxiliary Flow diverted to the directional


RVD50-20P — PED rated product for accumulator charging circuits

The RVD50-20P is a direct-acting, poppet type, hydraulic safety relief valve. The RVD50-20P is suitable for use as a safety accessory in Category IV, Group 2 applications according to the pressure equipment directive (PED) 97/23/EC, which is primarily concerned with the protection of Accumulator Circuits. This is particularly well suited for dynamic brake charging circuits where pressure clipping and quick discharge of energy is often needed.

Hydraulic Power Take-Off with Flow Sharing

HydraForce Auxiliary Function Circuits provide precise control of flows for balers, crop harvesters, and other auxiliary equipment.

Higher productivity requires higher flows, and HydraForce cartridge valves can handle flows up to 300 lpm (79 gpm).

When the flow demand exceeds the system supply, flow sharing can help maintain effective control.


Front and Rear Hitch Control Circuit


Hitch (Lift Control)

As tractor power and sophistication increases, so do the flow rates. HydraForce SPCL16-30 valves gives precise control up to 150 lpm (40 gpm) while holding the loads with extremely low leakage. HydraForce RV10-28 and RVD50-20 relief valves limit the shock pressure peaks whilst having very low leakage and hysteresis.


  • Gives precise control up to 150 lpm (40 gpm)
  • Limit shock pressure peaks
  • Low leakage and hysteresis


Proportional Hitch Control Circuit

Rear Hitch Control Circuit



Positioning and attaching the rear lift hitch attachment from the cab gives increased productivity and improved operator comfort and safety.

HydraForce is pleased to offer a full line of electronic vehicle control products integrating engine, transmission and other machine functions into a common J1939 or CAN Open Data Link control circuit.

These systems consist of rugged, field-proven components suitable for heavy-duty operating conditions. PWM digital signal logic maximizes efficiency, response and signal integrity under harsh environmental conditions. Reliability has been proven through extensive testing, as well as years of real-world application experience.

This is a complete line of the most rugged, heavy duty vehicle machine controllers, monitors, displays and electrical connectors for motion control and integrated machine control applications in mobile, off-highway and material handling equipment.

  • Reliable operation in the most demanding mobile equipment applications
  • Operating temperatures from -40 to 85°C
  • Chemical splash immunity
  • Moisture resistance to IP67 specifications
  • Fully resistant to EMI/RFI
  • Vibration resistant to 8 Grms (random) 24–200 Hz, 3-axis


Associated Applications



Gravity lowering | Main control | Variable speed fan drives | Steering and brake controls | Powertrain | Load moment limitation Learn More
Tow Behind Implements

Tow Behind Implements

Load Sense Boost | Coulter Pressure Control | Auger Controls Learn More


Open/close/ejection | Head lift/lower | Gathering and cutting | Precise pressure control for optimum bale density | Belt drive | Wrapping Learn More

Video: Hydro Pneumatic Suspension Systems

Suspension systems are now a necessary option for most farm equipment - this short video outlines the beneifts of cabin and axle suspension systems offered by HydraForce.

Request Engineering Assistance to learn more about suspension solutions
Video: Hydro Pneumatic Suspension Systems

IOT Fleet Management for Tractors

Hydraforce uses Internet of Things (IoT) technology to improve availability, reliability, and extend the lifetime of tractors. We achieve this through capturing and reporting important operation data such as:

  • Suspension systems
  • Powertrains
  • GPS based tracking devices
  • Variable-speed fan drives
  • Hitch controls
  • Electronic controls
  • Primary & auxiliary functions

The IoT fleet management technology from Hydraforce raises the ROI of farms by reducing maintenance costs and improving equipment availability. Benefits of our fleet management system include:

  • Key performance indicator reporting
  • Onboard software updating
  • Real-time information and data
  • Geo-location
  • Tracking technology
  • Monitoring and logging of key operating parameters (cycles, hours, temperatures, pressures, vibration, etc.)
  • Reducing breakdown risk and helping to prevent unnecessary maintenance

Implemented on tractors, HydraForce Internet of Things (IoT) technology improves reliability and availability and can even extend its lifetime. This is achieved by capturing and reporting operating data such as powertrains, variable speed fan drives, suspension systems, primary & auxiliary functions, hitch controls, and electronic controls, as well as through enhanced control and improved asset utilization.

Many farms make substantial investments in agricultural machinery. IoT fleet management technology from HydraForce raises ROI by improving availability and reducing maintenance costs. Contact us below for more details.

Fleet Management Solutions  

  • Monitoring and logging of key operating characteristics (cycles, hours, temperatures, pressures, vibration, etc.)
  • Reporting of key performance indicators
  • Remote adjustment of on-board settings (maximum permitted speeds, loads, etc.)
  • Updating of onboard software
  • Geo-location
  • Reducing the risk of breakdown and preventing unnecessary maintenance