The John Deere S660 combine harvester is a powerful and efficient machine designed for large-scale agricultural operations. However, like any complex piece of equipment, it can experience various issues that may affect its performance. This comprehensive guide will explore common John Deere S660 problems, their causes, and solutions, as well as provide expert advice on optimizing your combine for peak performance.
Understanding the John Deere S660 Combine
The John Deere S660 is part of the S-Series combine harvesters, known for their advanced technology and high capacity. It features a powerful engine, spacious grain tank, and sophisticated threshing and separating systems. Before delving into specific problems, let’s review some key specifications:
| Feature | Specification |
|---|---|
| Engine | 9.0L PowerTech PSS |
| Horsepower | 333 hp |
| Grain Tank Capacity | 300 bushels (10,600 L) |
| Unloading Rate | 3.3 bu/sec (116 L/sec) |
| Separator | Single rotor |
| Cleaning System | DynaFlo II |
Common John Deere S660 Problems and Solutions
Engine Issues
Problem: Engine Stalling
Causes:
- Dirty air filter
- Clogged fuel filter
- Faulty fuel pump
- Contaminated fuel
Solutions:
- Replace the air filter regularly, especially in dusty conditions.
- Clean or replace the fuel filter as per the maintenance schedule.
- Check the fuel pump and replace if necessary.
- Drain the fuel tank and refill with clean, high-quality fuel.
Problem: Loss of Power
Causes:
- Turbocharger issues
- Clogged exhaust system
- Worn piston rings or cylinder walls
Solutions:
- Inspect and clean the turbocharger. Replace if damaged.
- Check and clean the exhaust system, including the muffler and pipes.
- Perform a compression test and rebuild the engine if necessary.
Threshing and Separating System Problems
Problem: Grain Loss
Causes:
- Incorrect rotor speed
- Improper concave clearance
- Worn or damaged rotor bars
Solutions:
- Adjust the rotor speed according to crop conditions and manufacturer recommendations.
- Check and adjust the concave clearance for optimal threshing.
- Inspect rotor bars for wear and replace as needed.
Problem: Grain Damage
Causes:
- Excessive rotor speed
- Too tight concave clearance
- Damaged or worn threshing elements
Solutions:
- Reduce rotor speed to minimize grain damage.
- Increase concave clearance slightly to allow for gentler threshing.
- Replace worn or damaged threshing elements, including rasp bars and concaves.
Cleaning System Issues
Problem: Poor Grain Sample
Causes:
- Incorrect fan speed
- Improper sieve settings
- Overloaded cleaning shoe
Solutions:
- Adjust fan speed to achieve the right balance between cleaning and grain retention.
- Fine-tune chaffer and sieve openings based on crop type and conditions.
- Reduce ground speed to prevent overloading the cleaning system.
Problem: Excessive Tailings
Causes:
- Inadequate threshing
- Improper sieve settings
- Damaged sieves
Solutions:
- Check and adjust threshing settings to ensure proper grain separation.
- Adjust sieve openings to allow for efficient cleaning without excessive tailings.
- Inspect sieves for damage and replace if necessary.
Optimizing Your John Deere S660 Combine
To get the most out of your S660 combine, consider the following optimization tips:
Regular Maintenance
Implement a rigorous maintenance schedule, including:
- Daily inspections of key components
- Regular oil and filter changes
- Lubrication of all moving parts
- Thorough cleaning after each use
Proper Calibration
Ensure all sensors and systems are properly calibrated:
- Yield monitor
- Moisture sensor
- AutoTrac guidance system
- Header height control
Harvest-Specific Adjustments
Optimize settings for different crops:
- Adjust rotor speed and concave clearance for various grains
- Fine-tune cleaning system settings based on crop and field conditions
- Set the correct header height and reel position for optimal crop intake
Upgrade Considerations
Consider these upgrades to enhance performance:
- Install a chopper for better residue management
- Upgrade to a larger header for increased efficiency
- Implement precision farming technologies for data-driven decision-making
Operator Training
Invest in operator training to ensure:
- Proper machine operation techniques
- Understanding of all features and settings
- Ability to troubleshoot common issues in the field
Preventive Measures
To minimize problems with your John Deere S660:
- Store the combine in a covered area when not in use
- Perform thorough pre-season and post-season inspections
- Keep detailed maintenance and repair records
- Use only genuine John Deere parts for replacements
By following these guidelines and addressing issues promptly, you can maximize the performance and longevity of your John Deere S660 combine harvester. Remember that regular maintenance and proper operation are key to avoiding many common problems and ensuring a successful harvest season.
FAQs
What is the most common cause of engine stalling in a John Deere S660?
The most common cause is often a dirty air filter or clogged fuel filter. Regular filter maintenance can prevent this issue.
How often should I calibrate the yield monitor on my S660?
Calibrate the yield monitor at the start of each harvest season and when switching between significantly different crops.
Can I use a chopping corn head on a John Deere S660?
It’s not recommended due to the high torque requirements. A 5-speed feederhouse drive is better suited for chopping heads.
What’s the best way to prevent grain damage during threshing?
Adjust the rotor speed and concave clearance according to crop conditions. Start with manufacturer recommendations and fine-tune as needed.
How can I improve the grain sample quality from my S660?
Focus on optimizing fan speed and sieve settings. Adjust based on crop type and monitor the grain sample frequently during harvest.