The functions of John Deere 8R series tractors you must know

The John Deere 8R series tractors are the flagship products of Deere's large tractors. They feature the most advanced technology and configuration, are fully electronically controlled, offer more automatic functions, and achieve outstanding safety protection performance. Not only should the safety of the tractor be ensured, but more importantly, the safety of the tractor's operator, the "driver", should be guaranteed. It makes the operation of the entire vehicle easy, comfortable, efficient, economical and safe, providing users with an unparalleled driving and control experience.

The automatic function of the engine

(1) : A cooling system monitored by dual sensors

The functions of John Deere 8R series tractors you must know

There are two liquid level position monitoring sensors at the bottom of the antifreeze expansion tank, which provide the driver with the position information of the antifreeze liquid level through the engine control unit (ECU). If the liquid level is 0.5 liters lower than the "lowest position", an alarm will sound to alert the driver that the antifreeze level is low. When the liquid level is 1.2 liters lower than the warning level, the second sensor will activate the engine into protection mode, reducing power or shutting down the engine to achieve automatic protection of the engine. Protect the engine and increase the effective working time.

(2) : Vari-CoolTM continuously variable speed fan drive system

The functions of John Deere 8R series tractors you must know

The control system determines the required fan speed by monitoring various parameters related to temperature, such as engine load and throttle position, and precisely controls the fan speed through a stepless speed change system. Make the fan operate only at the required speed to reduce the engine power consumed during its operation. For the entire vehicle, it means reducing fuel consumption.

(3) : Dual-engine speed cruise

The driver can easily set the two cruising engine speed values through the control center display screen as needed. For example: One speed is 1950 revolutions per minute, used for field operations, and the other speed is 1500 revolutions per minute, used for road surface transfer or light-load operations, etc. Improve work quality and reduce fuel consumption.

The functions of John Deere 8R series tractors you must know

2. Automatic function of the transmission system

(1) : Automatic shifting function

The 8R tractor is equipped with a 16-speed full-power shift transmission. Move forward 16 gears and reverse 4 gears. Through the display screen, the driver can set the highest gear that might be required for a certain operation, such as F11 gear. After the Settings are completed, when the load increases and causes the engine speed to drop, it will automatically downshift from the highest gear set. When the load decreases, it automatically shifts up and returns to the original gear. Simplify operations and enhance work efficiency.

The functions of John Deere 8R series tractors you must know

How much has the engine speed dropped to start downshifting? We offer three different levels of sensitivity: low, medium and high. The meaning of "low" is: when the engine speed slightly drops, the gear begins to be reduced. It is suitable for operations where it is desired to maintain the engine speed as much as possible. "Medium" allows for a greater reduction in engine speed and is suitable for most machinery. The meaning of "high" is that before shifting gears, the engine speed is allowed to drop by a greater extent. Users can make their choices based on the operational requirements of different machinery.

(2) : Ground velocity matching function

When a tractor is traveling on the road at 16th gear, if it encounters a "Stop" sign, as long as the driver steps on the clutch pedal, the tractor's speed will gradually decrease from 16th gear until it reaches 11th gear. Pressing the brake will then stop the vehicle. This function is applicable when the forward gear is above 11 and the reverse gear is above 3. For safety reasons, when the clutch and brake pedals are released, the gear does not shift up automatically. This function is equivalent to an automatic downshift function, ensuring the safety of road transportation or transfer.

(3) : Automatic downshift function at high temperatures

When the control system detects that the transmission system is overheating and the driver does not manually downshift, the control system will automatically downshift from 13th gear in sequence until 6th gear to protect the transmission system.

3. Automatic function of the hydraulic system

(1) : The automatic control function of the last three-point suspension system

The lifting speed, lowering speed, lifting height and force/position adjustment of the last three suspension systems can all be easily set through the display screen. Once the Settings are completed, the corresponding automatic control functions can be realized, precisely meeting the operation requirements of the supporting machinery.

The functions of John Deere 8R series tractors you must know

(2) Preset function for the oil supply flow and time of the SCV valve

The flow rate and timing of fuel supply to the machinery through each SCV valve are precisely adjustable, reducing the complexity of the driver's operation and improving the working efficiency, especially during the turning at the edge of the field. For instance, when a tractor is equipped with a reversing plough and the fuel supply flow rate and time are set, when turning at the edge of the field, simply place the control lever in the fuel supply position, and the SVC valve will automatically complete the reversing action of the plough based on the set flow rate and fuel supply time.

The functions of John Deere 8R series tractors you must know

(3) : The locking function of the last three-point suspension and the SCV valve

Both the rear three-point suspension system and the SCV valve can be locked by pressing the "lock switch" to prevent accidental movement of the rear three-point suspension system and the machinery controlled by the SCV valve during road transportation or relocation, ensuring safety.

The functions of John Deere 8R series tractors you must know

(4) : The automatic activation function of the electronically controlled standby pump

The power of the 8R tractor is higher, and the weight and size of the machinery that comes with it are also larger. Therefore, higher requirements are put forward for the safety of the entire vehicle's operation. The brand-new electronic control system and hydraulic system design of the 8R tractor ensure that the electronic control backup pump is automatically activated when needed, guaranteeing the normal functions of the vehicle's braking and steering systems. It ensures the controllability of the entire vehicle to the greatest extent and protects the safety of the driver's operation. The position of the electronically controlled standby pump is shown in the following figure.

The functions of John Deere 8R series tractors you must know

4. Automatic functions of the electronic control system

Performance monitoring and fault alarm

The 8R tractor adopts a brand-new control technology that combines CAN bus and LIN bus. The entire vehicle is equipped with 3 CAN lines, 12+ computer boxes [hardware], and 24+ software. The performance of the entire vehicle is constantly monitored. If any abnormality is detected, the fault code and corresponding prompt information will be displayed on the screen. Enable the protection mode when necessary.

(2) : Lighting programming

Through the display screen, it is easy to program and set the lights, providing 360-degree stadium-style lighting for night operations. Ensure the safety and efficiency of night operations.

The functions of John Deere 8R series tractors you must know

(3) : Integrated automatic navigation system

The hydraulic system of the 8R tractor integrates the hydraulic valves, pipelines and other components required for the automatic navigation function. The electronic control system integrates the sensors, controllers and software needed for the navigation function. The control center display screen is compatible with the functions of the navigation display screen. Just install the receiver and you can achieve the plug-and-play navigation function.