John Deere 9670 STS Problems (And Possible Fixes)

The John Deere 9670 STS is a state-of-the-art combine harvester designed to enhance harvesting efficiency and productivity for farmers. Known for its powerful performance and advanced technology, the 9670 STS is a popular choice among agricultural professionals for its ability to handle a wide range of crops and field conditions.

Ask a Professional Expert: Fix Issues ASAP!

Regular maintenance and troubleshooting are essential for ensuring the John Deere 9670 STS operates at its peak performance. Like any complex machinery, the combine harvester is prone to wear and tear over time, leading to potential issues that can affect productivity and profitability. Timely identification and resolution of problems are crucial to prevent downtime and costly repairs.

Purpose of the Blog Post – Providing Guidance on Identifying and Resolving Issues

The purpose of this blog post is to provide farmers and equipment operators with a comprehensive guide to common problems encountered with the John Deere 9670 STS combine harvester. By understanding these issues and their respective troubleshooting steps, users can effectively address problems on their own or communicate more effectively with service professionals when needed. This blog aims to empower farmers with the knowledge and tools to optimize their combine harvester’s performance and minimize downtime during crucial harvesting seasons.

In the following sections, we will explore the most common problems experienced with the John Deere 9670 STS combine harvester and provide detailed troubleshooting steps for each issue, ensuring farmers can overcome challenges and maximize the efficiency of their agricultural operations.

Understanding the John Deere 9670 STS

Overview of the Combine Harvester’s Key Components and Features

The John Deere 9670 STS combine harvester is a cutting-edge agricultural machine equipped with advanced technology and robust components. Understanding its key components and features is crucial for efficient troubleshooting and maintenance.

Header: The header is the front attachment of the combine harvester that gathers and cuts the crops. The 9670 STS is compatible with various header types, such as grain headers, corn headers, and flex headers, making it versatile for different crop types and conditions.
Threshing and Separating Mechanism: Once the crops are gathered, they pass through the threshing and separating system. This mechanism effectively separates the grain from the straw, ensuring efficient harvesting.
Cleaning System: The cleaning system removes debris, chaff, and foreign materials from the harvested crop, delivering clean grain to the grain tank.
Grain Tank: The grain tank is where the harvested crop is stored before unloading. The 9670 STS model typically features a large grain tank capacity, reducing the frequency of unloading and increasing operational efficiency.
Engine and Powertrain: The combine is powered by a robust engine that provides the necessary horsepower to drive the harvesting components. The powertrain includes the transmission and other essential components responsible for propelling the harvester in the field.
Cab and Operator Controls: The cab is equipped with a comfortable and ergonomic layout, ensuring the operator’s convenience during long hours of operation. The operator controls the harvester’s functions, monitors performance, and receives vital information through the integrated display.
Precision Farming Technology: The 9670 STS is often equipped with advanced precision farming technology, such as GPS-based guidance systems and yield monitoring capabilities, which enable optimized field navigation and data collection for future analysis.

Performance Capabilities and Benefits of the 9670 STS Model

The John Deere 9670 STS combine harvester offers several performance capabilities and benefits, making it a preferred choice for modern agricultural practices:

High Harvesting Speed: The 9670 STS is designed for high-speed harvesting, allowing farmers to cover large fields efficiently.
Efficient Grain Handling: With its advanced threshing and separating system, the 9670 STS ensures minimal grain loss, maximizing overall crop yield.
Adaptability: The combine’s ability to accommodate various header types and adjust to different crop conditions enhances its adaptability for diverse farming operations.
Fuel Efficiency: Equipped with a modern and fuel-efficient engine, the 9670 STS helps reduce operating costs while maintaining productivity.
Operator Comfort: The ergonomic cab design and user-friendly controls contribute to operator comfort and reduced fatigue during long working hours.
Data-Driven Decision Making: The integration of precision farming technology empowers farmers to make data-driven decisions, leading to improved field management and higher yields.

In conclusion, the John Deere 9670 STS combine harvester is a technologically advanced and reliable machine with exceptional performance capabilities. By understanding its key components and features, as well as its benefits, farmers can better appreciate its capabilities and be better prepared to troubleshoot and maintain the harvester for optimal performance throughout the harvest season.

Common Problems Encountered with the John Deere 9670 STS

Harvesting-Related Issues

Crop Gathering Problems:

Issue Description: Crop gathering problems can occur when the combine fails to collect the crops efficiently from the field, resulting in uneven cutting or missed portions of the crop.

Troubleshooting Steps:

Check the Header: Inspect the header for any damage or obstructions that could impede the crop flow. Clean any debris, such as straw or chaff, that may have accumulated.
Adjust Ground Speed: Adjust the ground speed to match the crop conditions. Slower ground speed may be necessary in dense or lodged crops.
Check Knife and Guards: Ensure the knife is sharp and properly aligned with the guards. Dull or misaligned knives can affect the cutting performance.
Check Reel Operation: Ensure the reel is functioning correctly and set at the appropriate height and speed to aid in crop gathering.

Header Height Control Malfunctions:

Issue Description: Header height control malfunctions can result in the header being too high or too low, leading to poor cutting performance and potential header damage.

Troubleshooting Steps:

Calibrate the Height Control System: Perform a calibration of the header height control system following the manufacturer’s guidelines.
Inspect Sensors and Wiring: Check for damaged or faulty sensors and wiring that may affect the header’s position control. Repair or replace as necessary.
Clean Sensor Area: Ensure sensors are clean and free from dirt or debris that may interfere with their proper operation.
Check Hydraulic Connections: Verify that all hydraulic connections related to the header height control system are secure and leak-free.

Threshing and Separating Inefficiencies:

Issue Description: Threshing and separating inefficiencies can lead to grain loss, poor grain quality, and increased load on the combine’s components.

Troubleshooting Steps:

Adjust Threshing Parameters: Review the combine’s settings and adjust threshing and separation parameters based on the crop type and field conditions.
Check Concave Clearance: Ensure the concave clearance is set correctly to optimize the threshing process. A too-tight or too-wide setting can impact performance.
Inspect Rotor and Separating Grates: Clean and inspect the rotor and separating grates for wear or damage. Replace worn parts to maintain efficient separation.
Monitor Fan Speed: Check the fan speed to ensure proper air flow, which aids in the separation process. Adjust as needed for different crop conditions.

By following these troubleshooting steps for harvesting-related issues with the John Deere 9670 STS, farmers can identify and resolve problems promptly, ensuring efficient crop gathering, header operation, and threshing and separating performance during harvesting operations. Proper maintenance and timely troubleshooting contribute to a smoother harvesting process and optimize the overall performance of the combine harvester.

Read more: John Deere 4960 Problems (Fix Now)

Engine and Powertrain Problems

Engine Starting Issues:

Issue Description: Engine starting problems can be frustrating and may lead to delays in starting the John Deere 9670 STS combine harvester. This issue can be caused by various factors, ranging from fuel system issues to electrical problems.

Troubleshooting Steps:

Check Battery and Connections:

Ensure the battery terminals are clean and tightly connected. Corroded or loose terminals can hinder the electrical current flow.
Check the battery voltage using a multimeter. The battery voltage should be within the manufacturer’s recommended range.
If the battery voltage is low, charge the battery or replace it if necessary.

Inspect Fuel System:

Verify that there is enough fuel in the tank. Add fuel if required.
Check for any fuel leaks in the system that might cause fuel pressure loss.
If the combine has been idle for an extended period, there might be air in the fuel lines. Bleed the fuel system to remove any air bubbles.

Examine Glow Plugs (if applicable):

If the combine is equipped with glow plugs (common in diesel engines), ensure they are working correctly.
Faulty glow plugs can lead to difficulty in starting the engine, especially in cold weather conditions.

Check Starter Motor:

Listen for any clicking or grinding noises when attempting to start the engine. These noises might indicate a faulty starter motor.
Test the starter motor’s performance and replace it if it fails to function properly.

Inspect Ignition System:

Check the spark plugs (if applicable) and ignition coils (for gasoline engines) to ensure they are in good condition.
Faulty spark plugs or ignition coils can hinder the engine from starting smoothly.

Loss of Power or Engine Performance:

Issue Description: A loss of power or reduced engine performance can negatively impact the combine harvester’s efficiency, leading to slower harvesting and reduced productivity.

Troubleshooting Steps:

Inspect Air Filter and Intake System:

Check the air filter for clogs or excessive dirt accumulation. A dirty air filter can restrict airflow and reduce engine performance.
Clean or replace the air filter as needed.

Review Fuel Quality and Filters:

Check the fuel quality and ensure it meets the manufacturer’s recommendations. Contaminated or poor-quality fuel can affect engine performance.
Replace fuel filters regularly to prevent clogging and fuel flow issues.

Check Exhaust System:

Inspect the exhaust system for blockages or restrictions. A clogged exhaust can lead to reduced engine efficiency.
Ensure the exhaust system is in good condition and free from leaks.

Verify Turbocharger (if applicable):

If the combine is equipped with a turbocharger, ensure it is functioning correctly.
A malfunctioning turbocharger can result in reduced engine power.

Inspect Fuel Injection System (for diesel engines):

For diesel engines, verify the fuel injection system for any issues.
Faulty fuel injectors can cause uneven power delivery and reduced engine performance.

Check Engine Timing:

Inspect the engine timing and ensure it is within the manufacturer’s specifications.
Incorrect engine timing can lead to reduced power output.

Monitor Engine Temperature:

Overheating can lead to engine power loss. Ensure the cooling system is working correctly and the coolant level is sufficient.

By meticulously following these troubleshooting steps for engine and powertrain problems with the John Deere 9670 STS combine harvester, farmers can identify and resolve issues that affect the engine’s starting and overall performance. Regular maintenance and timely troubleshooting ensure the combine operates optimally and maintains its productivity during the demanding harvesting season.

Electrical and Technology-related Problems

Display and Monitor Malfunctions:

Issue Description: Display and monitor malfunctions can hinder the operator’s ability to monitor vital information and control the John Deere 9670 STS combine harvester effectively. These issues may arise due to software glitches, connectivity problems, or physical damage to the display unit.

Troubleshooting Steps:

Restart the Display System:

The first step is to restart the display system. Turn off the display and monitor, disconnect the power source, wait for a few minutes, and then reconnect the power source to see if the issue is resolved.

Check for Software Updates:

Check for available software updates for the display system on the manufacturer’s website.
If updates are available, follow the instructions to install them, as they may address known issues and improve system performance.

Inspect Display Connections:

Examine the display’s connection cables and ports for damage or loose connections.
Securely reconnect any loose connections and replace damaged cables if necessary.

Perform a Factory Reset:

If the issue persists, perform a factory reset on the display unit following the manufacturer’s guidelines.
Be sure to back up any important data before resetting the system, as this process will erase all custom settings and configurations.

Contact Technical Support:

If none of the above steps resolve the problem, contact the manufacturer’s technical support for further assistance.
They may provide additional troubleshooting steps or recommend sending the display unit for repair or replacement.

Communication Errors with Precision Farming Systems:

Issue Description: The John Deere 9670 STS combine harvester is often equipped with precision farming systems, such as GPS-based guidance and yield monitoring. Communication errors between these systems can result in data discrepancies and affect overall operational efficiency.

Troubleshooting Steps:

Check GPS Signal and Antenna:

Ensure the combine is receiving a strong and stable GPS signal. Verify that the GPS antenna is securely attached and positioned correctly.
Clean the antenna and surrounding area to avoid signal interference.

Inspect Wiring and Connections:

Examine the wiring and connections related to the precision farming systems, including GPS, yield monitoring, and other sensors.
Repair or replace any damaged or loose wiring that might be causing communication errors.

Update Firmware and Software:

Check for firmware and software updates for all precision farming components and the main combine system.
Install the latest updates to ensure compatibility and resolve potential communication issues.

Calibrate Sensors and Systems:

Follow the manufacturer’s guidelines to calibrate the GPS, yield monitoring, and other precision farming sensors.
Proper calibration ensures accurate data collection and communication.

Verify Data Compatibility:

If using third-party software or external data storage, ensure that the data formats are compatible with the precision farming systems on the combine.
Use compatible data formats to prevent data communication errors.

Reset Precision Farming Systems:

If communication errors persist, reset the precision farming systems to their default settings and reconfigure them according to the manufacturer’s instructions.

Contact Technical Support:

If the problem remains unresolved, contact the precision farming system’s manufacturer or technical support for further assistance.
They may provide advanced troubleshooting steps or recommend on-site support if needed.

By following these in-depth troubleshooting steps for electrical and technology-related problems with the John Deere 9670 STS combine harvester, farmers can efficiently resolve display and communication errors, ensuring smooth operation and data accuracy for precision farming applications. Timely troubleshooting and maintenance of electronic components contribute to improved overall performance and data-driven decision-making during harvesting seasons.

General Mechanical Issues

Hydraulic System Failures:

Issue Description: Hydraulic system failures in the John Deere 9670 STS combine harvester can lead to reduced functionality of critical components, such as header control, unloading auger, and straw chopper. Leaks, insufficient pressure, or component malfunctions are common causes of hydraulic issues.

Troubleshooting Steps:

Check Hydraulic Fluid Level:

Inspect the hydraulic fluid reservoir and ensure the fluid level is within the recommended range. Add fluid if necessary, following the manufacturer’s specifications.

Inspect Hydraulic Hoses and Connections:

Examine all hydraulic hoses and connections for signs of leaks, damage, or loose fittings.
Tighten loose connections and replace damaged hoses to prevent fluid leakage.

Check Hydraulic Filters:

Inspect and replace the hydraulic filters regularly to maintain clean hydraulic fluid and prevent clogs that could restrict hydraulic flow.

Examine Hydraulic Pump:

Verify the hydraulic pump’s performance to ensure it is providing sufficient pressure to operate the hydraulic components.
If the pump is not functioning correctly, it may need repair or replacement.

Bleed the Hydraulic System:

If air enters the hydraulic system due to maintenance or repairs, bleed the system to remove air bubbles, which can cause inconsistent hydraulic performance.

Inspect Hydraulic Cylinders:

Check the hydraulic cylinders for damage, leaks, or misalignment. Repair or replace cylinders that are not functioning correctly.

Verify Relief Valve Operation:

Ensure the relief valve is working correctly to prevent pressure buildup and potential damage to the hydraulic system.

Contact Technical Support:

If the hydraulic system issues persist or require specialized expertise, contact the manufacturer’s technical support or a certified service professional for further diagnosis and repair.

Belts and Chains Maintenance and Failures:

Issue Description: The John Deere 9670 STS combine harvester utilizes belts and chains to drive various components, such as the header, rotor, and cleaning system. These belts and chains are subjected to considerable stress during harvesting operations, and their failure can result in operational disruptions.

Troubleshooting Steps:

Inspect Belt and Chain Tension:

Check the tension of belts and chains regularly to ensure they are properly tensioned. Loose belts or chains can slip and cause malfunctions.

Check for Wear and Damage:

Inspect belts and chains for signs of wear, cracking, or damage. Replace any worn-out components to prevent unexpected failures.

Lubricate Chains:

Properly lubricate the chains following the manufacturer’s recommendations to reduce friction and wear.

Verify Alignment:

Ensure belts and chains are correctly aligned with their respective pulleys and sprockets.
Misalignment can cause premature wear and reduce component performance.

Replace Worn Sprockets and Pulleys:

If belts or chains are wearing prematurely, inspect the sprockets and pulleys. Worn or damaged sprockets and pulleys should be replaced to maintain proper engagement.

Tighten Fasteners:

Check and tighten all fasteners associated with belts and chains, including bolts and tensioning devices, to secure proper connections.

Perform Regular Maintenance:

Implement a regular maintenance schedule for belts and chains, including cleaning, inspection, and adjustment.
Following the manufacturer’s maintenance guidelines can extend the life of these components.

Contact Technical Support:

If persistent issues or complex repairs are required, consult the manufacturer’s technical support or seek assistance from a certified service professional.

By carefully following these in-depth troubleshooting steps for general mechanical issues with the John Deere 9670 STS combine harvester, farmers can effectively address hydraulic system failures, maintain the health of belts and chains, and ensure the overall reliability of the machine during the demanding harvesting season. Regular maintenance and timely repairs contribute to extended equipment life and enhanced performance in the field.

Preventive Maintenance Tips

Regular Inspection and Servicing Schedule:

Regular inspection and servicing are critical to ensure the John Deere 9670 STS combine harvester operates at its best and remains reliable throughout the harvesting season. Following a well-structured inspection and servicing schedule helps identify potential issues before they escalate into major problems.

Preventive Maintenance Steps:

Create a Maintenance Checklist: Develop a comprehensive maintenance checklist that covers all essential components of the combine, including engine, hydraulics, electrical systems, belts, chains, and precision farming technology.
Establish a Schedule: Set up a maintenance schedule based on hours of operation or specific intervals recommended by the manufacturer. Regularly adhere to this schedule to stay on top of maintenance tasks.
Perform Regular Checks: Conduct daily pre-operation checks before starting the combine, including inspecting fluid levels, checking tire pressure, and examining belts and chains for signs of wear.
Document Maintenance Activities: Keep detailed records of all maintenance activities, including dates, tasks performed, and any issues identified. This documentation will help track maintenance history and ensure nothing is overlooked.
Train Operators: Ensure all operators are trained on the importance of regular inspection and maintenance and understand how to perform basic checks before and after each operation.

Importance of Keeping the Combine Clean and Well-Maintained:

Keeping the John Deere 9670 STS combine harvester clean and well-maintained is vital for its longevity and optimal performance. A clean machine reduces the risk of mechanical issues and increases efficiency during harvesting.

Preventive Maintenance Steps:

Clean After Each Use: Thoroughly clean the combine after each use to remove dirt, crop residue, and debris. Pay special attention to areas around critical components, such as the engine and hydraulics.
Properly Store the Combine: When not in use, store the combine in a sheltered location, such as a barn or shed, to protect it from weather elements and reduce the risk of rust and corrosion.
Address Residue Management: Efficiently manage crop residue to prevent excessive accumulation in critical areas. Regularly check and clean straw choppers and spreaders.
Inspect and Clean Air Filters: Regularly inspect air filters and clean or replace them as needed to maintain proper airflow to the engine and prevent engine damage due to dust and debris.
Check Cooling System: Keep the radiator and cooling system clean and free from dirt and debris to prevent engine overheating.
Inspect Electrical Connections: Check electrical connections for signs of corrosion and ensure they are clean and securely fastened. Corroded connections can lead to electrical problems.

Lubrication and Fluid Level Checks:

Proper lubrication and maintaining adequate fluid levels are crucial for the smooth operation and longevity of the John Deere 9670 STS combine harvester. Lubrication reduces friction and wear on moving parts, while fluid levels ensure proper functioning of various systems.

Preventive Maintenance Steps:

Follow Lubrication Schedule: Adhere to the manufacturer’s lubrication schedule to ensure all moving parts receive the necessary lubrication. Use recommended lubricants for each component.
Check Hydraulic Fluid Level: Regularly check the hydraulic fluid level and top it up to the recommended level when necessary. Low hydraulic fluid can lead to system failures.
Monitor Engine Oil Level: Check engine oil regularly and change it as per the recommended intervals. Clean engine oil ensures optimal engine performance and longevity.
Inspect Gearbox and Transmission Fluid: Regularly inspect and maintain the gearbox and transmission fluid levels to prevent wear and damage to these critical components.
Check Grease Points: Grease all the designated points in the combine, including bearings and pivot points, to reduce friction and prevent premature wear.

Performing preventive maintenance, including regular inspection, keeping the combine clean, and maintaining proper lubrication and fluid levels, is essential for maximizing the John Deere 9670 STS combine harvester’s efficiency and minimizing downtime. With diligent maintenance practices, farmers can rely on their combine to deliver consistent and reliable performance throughout the harvest season.

When to Seek Professional Help

Knowing the Limits of DIY Troubleshooting:

While regular maintenance and troubleshooting are essential for keeping the John Deere 9670 STS combine harvester in optimal condition, there are certain situations where DIY troubleshooting may not be sufficient or appropriate. Understanding the limits of DIY troubleshooting helps avoid potential risks and ensures that complex issues are addressed effectively.

Guidelines for DIY Troubleshooting:

Basic Maintenance: Farmers and operators can perform basic maintenance tasks, such as daily pre-operation checks, lubrication, and cleaning.
Simple Issues: Minor issues that are easily identifiable and have straightforward solutions can be handled through DIY troubleshooting.
Following Manufacturer’s Instructions: DIY troubleshooting should always follow the manufacturer’s guidelines and recommendations to prevent further damage or voiding warranties.
Using Proper Tools: Use the appropriate tools and safety equipment when performing DIY troubleshooting and maintenance.

When to Seek Professional Assistance:

Complex Problems: If the issue involves intricate components, electronics, or hydraulic systems, it is best to seek professional assistance.
Lack of Expertise: If the operator lacks the expertise or experience to diagnose and resolve the problem correctly, it’s safer to rely on a qualified professional.
Safety Concerns: If the troubleshooting process involves working with hazardous components or poses safety risks, it’s best to let trained professionals handle the task.
Risk of Further Damage: If DIY troubleshooting could potentially lead to further damage or complications, it’s wise to seek professional help to avoid exacerbating the problem.

Signs That Indicate the Need for Professional Assistance:

Recognizing the signs that indicate the need for professional assistance is crucial to prevent equipment damage, safety risks, and downtime during critical harvesting periods. Timely intervention by qualified technicians can prevent small issues from turning into major problems.

Indicators for Seeking Professional Assistance:

Persistent Issues: If a problem persists or reoccurs after DIY troubleshooting attempts, it’s a clear sign that professional expertise is needed to identify the root cause.
Unfamiliar Noises or Smells: Strange noises, vibrations, or unusual smells emanating from the combine could be indications of underlying issues that require professional diagnosis.
Error Codes or Warning Lights: If error codes or warning lights appear on the display, it indicates potential system failures that should be addressed by a qualified technician.
Loss of Performance: A significant reduction in the combine’s performance, such as reduced power or efficiency, warrants professional attention to diagnose and rectify the problem.
Hydraulic or Electrical Failures: Hydraulic system failures or electrical malfunctions should be handled by professionals due to the complexity of these systems.
Precision Farming System Errors: Communication errors or malfunctions in precision farming systems require specialized knowledge to resolve accurately.

Remember, seeking professional assistance from authorized dealerships or certified technicians not only ensures the problem is correctly diagnosed and repaired but also helps maintain the combine’s warranty coverage.

By recognizing the limits of DIY troubleshooting and paying attention to signs that indicate the need for professional help, farmers and operators can make informed decisions to safeguard the performance and longevity of their John Deere 9670 STS combine harvester. Promptly addressing issues through the appropriate channels contributes to minimizing downtime and maximizing productivity during the critical harvesting season.

Conclusion

In conclusion, the John Deere 9670 STS combine harvester is a powerful and efficient machine designed to streamline the harvesting process and enhance farmers’ productivity. However, like any complex piece of equipment, it is prone to encounter various issues during its operational lifespan. Understanding common problems and their troubleshooting steps is essential for farmers and operators to maintain the combine’s optimal performance and prevent costly downtime.

Throughout this blog post, we have explored the key components and features of the John Deere 9670 STS, the importance of troubleshooting and maintenance, and provided detailed troubleshooting steps for different categories of issues. From addressing harvesting-related problems to tackling engine and powertrain issues, we have offered comprehensive solutions to help farmers identify and resolve issues promptly.

Moreover, we emphasized the significance of preventive maintenance, including regular inspection, cleanliness, and lubrication, to ensure the combine’s longevity and reliability. Following a structured maintenance schedule and knowing when to seek professional help are crucial aspects of maintaining the combine in top condition.

By adhering to these preventive maintenance tips and promptly addressing any identified issues, farmers can maximize the performance and efficiency of their John Deere 9670 STS combine harvester. A well-maintained combine not only ensures smooth harvesting operations but also enhances overall productivity and yield.

As technology evolves and farming practices advance, staying updated with the latest maintenance recommendations and precision farming systems is essential. We encourage farmers and operators to take advantage of manufacturer resources, seek technical support when needed, and participate in training programs to keep their equipment running at its best.

With proper care, attention, and timely troubleshooting, the John Deere 9670 STS combine harvester will continue to be a valuable asset, facilitating the harvesting of crops efficiently and contributing to the success of agricultural operations.