John Deere R72 Combine Manual: Your Comprehensive Guide

Understanding Your John Deere R72 Combine

R72 Combine Specifications

The John Deere R72 Combine represents a significant piece of agricultural machinery, designed for efficient harvesting of various crops. Understanding its specifications is crucial for optimal operation and maintenance. The R72 boasts a powerful engine, typically a John Deere PowerTech engine, providing ample horsepower for tackling demanding harvesting conditions. Knowing the engine displacement, rated RPM, and fuel consumption rates will help you plan your fieldwork efficiently and manage fuel costs. Furthermore, understanding the combine's physical dimensions, including its overall length, width, and height, is essential for navigating fields, transporting the machine, and storing it properly when not in use. Consult the original manufacturer's specifications sheet for the precise details relevant to your specific R72 model year.

Beyond the engine and physical size, several other specifications are critical. The grain tank capacity, measured in bushels or cubic feet, directly influences how frequently you need to unload during harvesting. Keep in mind the unloading rate, which determines how quickly you can empty the grain tank, minimizing downtime. The tire sizes and configurations impact traction, floatation, and stability in different field conditions, and ensure that you use the correctly sized tires for your machine. Finally, understanding the hydraulic system's pressure ratings and flow rates is essential for troubleshooting issues related to the header, reel, and other hydraulically controlled components. Remember, safe and efficient operation relies on a thorough understanding of these specifications.

Key Components and Their Functions

The John Deere R72 Combine is comprised of numerous interconnected components, each playing a vital role in the harvesting process. Starting at the front, the header is responsible for cutting the crop and feeding it into the combine. Various header types exist, including row crop headers for corn and soybeans and grain platforms for wheat and other small grains. Each header is designed to efficiently gather the target crop while minimizing losses. Proper header adjustment is paramount to ensuring a clean cut and minimizing grain loss at the header itself.

Once the crop enters the combine, it proceeds to the threshing and separating systems. The threshing system, typically employing a rotor or cylinder, separates the grain from the stalks and other plant material. The separating system then removes the remaining grain from the material other than grain (MOG). This system relies on various technologies to shake the grain free from any leftover plant materials. Next, the cleaning system removes chaff, straw, and other impurities from the grain sample. This system utilizes a combination of sieves and airflow to separate the heavier grain from the lighter debris. Understanding how each of these systems interacts is crucial for optimizing grain quality and minimizing grain loss. The cleaned grain is then conveyed to the grain tank for temporary storage until unloading.

Finally, the combine’s power train and hydraulic systems drive all these functions. The engine provides power to the transmission, which transfers it to the wheels and various hydraulic pumps. The hydraulic system provides power to the header, reel, unloading auger, and other hydraulically controlled components. Regular maintenance of these systems, including fluid level checks, filter replacements, and leak inspections, is crucial for preventing breakdowns and ensuring reliable operation. Familiarize yourself with the location and function of all major components, from the engine and transmission to the header and grain tank. This will help you diagnose and troubleshoot problems more effectively.

Safety Precautions and Guidelines

Operating a John Deere R72 Combine involves inherent risks, and prioritizing safety is paramount. Always consult the operator's manual for specific safety instructions and warnings related to your combine model. Before starting the engine, perform a thorough walk-around inspection to check for any potential hazards, such as loose parts, fluid leaks, or obstructions around the wheels. Never operate the combine under the influence of alcohol or drugs, and always ensure you are physically and mentally fit to operate the machine safely. Always make sure that your machine is well lit when operating near roads or in areas where there is low visibility.

Be especially cautious when working around moving parts, such as the header, reel, and unloading auger. Never attempt to clear obstructions or perform maintenance while the engine is running. Always disengage the engine, set the parking brake, and remove the key before working on the combine. Wear appropriate personal protective equipment (PPE), including safety glasses, hearing protection, and gloves, to minimize the risk of injury. Be aware of overhead power lines and maintain a safe distance at all times to avoid electrocution.

When transporting the combine on public roads, adhere to all traffic regulations and obtain any necessary permits. Use appropriate warning lights and flags to alert other drivers to the presence of the large machinery. Secure the header properly to prevent it from shifting during transport. Regular safety training and awareness are crucial for preventing accidents and ensuring a safe harvesting season. Communicate clearly with all workers in the field to avoid misunderstandings and potential hazards. Remember, a commitment to safety is essential for protecting yourself and others around you.

Operating Procedures

Pre-Operation Checks

Before you even think about firing up the John Deere R72 Combine, a thorough pre-operation check is absolutely critical. This isn't just a formality; it's an investment in the longevity of your machine and, more importantly, your safety. Walk around the entire combine, paying close attention to any signs of damage, leaks, or loose components. Check the tires for proper inflation and any cuts or bulges that could indicate a potential blowout during operation. Ensure all guards and shields are securely in place, as these are designed to protect you from moving parts. Neglecting these seemingly minor checks can lead to costly repairs down the road, or even worse, a serious accident. Remember, a well-maintained combine is a productive and safe combine.

Specifically, pay close attention to fluid levels. Check the engine oil, hydraulic fluid, coolant, and fuel levels, topping them off as needed. Low fluid levels can cause serious damage to the engine, hydraulics, and other critical components. Examine all belts and hoses for wear and tear, such as cracks, fraying, or leaks. Replace any belts or hoses that show signs of damage to prevent them from failing during operation. A broken belt in the middle of harvest can bring the whole operation to a grinding halt. Verify the operation of all lights, including headlights, taillights, brake lights, and turn signals. This is particularly important for road transport and operating in low-light conditions.

Starting and Stopping the Combine

Starting and stopping the John Deere R72 Combine requires a specific sequence of steps to ensure safe and reliable operation. First, before attempting to start the engine, ensure that the parking brake is fully engaged. This will prevent the combine from moving unexpectedly during the starting process. Next, turn the ignition key to the "on" position and wait for the instrument panel to illuminate. This allows the combine's computer system to perform a self-check and ensure that all systems are functioning properly. If any warning lights remain illuminated after the self-check, consult the operator's manual for troubleshooting information.

Once the instrument panel is clear, turn the ignition key to the "start" position and hold it until the engine starts. Release the key as soon as the engine starts to avoid damaging the starter motor. Allow the engine to idle for a few minutes to warm up before engaging any of the combine's operating functions. This allows the oil to circulate and lubricate all of the engine's moving parts. To stop the combine, simply turn the ignition key to the "off" position. Allow the engine to cool down for a few minutes before performing any maintenance or repairs. Engaging the parking brake after the engine has stopped will ensure the machine does not move.

Adjusting Settings for Optimal Harvesting

Achieving optimal harvesting performance with the John Deere R72 Combine requires careful adjustment of various settings based on the specific crop being harvested and the prevailing field conditions. Before beginning, consult the operator's manual for recommended settings for the crop you are harvesting. Factors such as crop type, moisture content, and maturity level will influence the optimal settings. These settings include header height, reel speed, concave clearance, fan speed, and sieve settings. Incorrect settings can lead to grain loss, poor threshing, and excessive material other than grain (MOG) in the grain tank.

Fine-tuning these settings is an iterative process. Start by making small adjustments and observing the results. Check the grain tank for grain loss and excessive MOG. Adjust the concave clearance and fan speed to minimize grain loss and improve grain cleanliness. Regularly monitor the tailings return and adjust the sieve settings accordingly. As field conditions change throughout the day, such as changes in moisture content, you may need to readjust the settings to maintain optimal performance. Detailed record-keeping of settings versus yield can optimize future harvests.

Transporting the Combine Safely

Transporting the John Deere R72 Combine on public roads requires adherence to specific safety precautions and regulations to ensure the safety of yourself and other motorists. Before transporting the combine, thoroughly inspect it to ensure that all components are secure and in good working order. Check the tires for proper inflation and any signs of damage. Verify that all lights, including headlights, taillights, brake lights, and turn signals, are functioning properly. Ensure that the slow-moving vehicle (SMV) emblem is properly displayed and visible from a distance.

When transporting the combine, drive at a safe and reasonable speed, taking into account the size and weight of the machine. Be aware of your surroundings and anticipate the actions of other drivers. Use caution when approaching intersections and turning corners. If the combine is equipped with a wide header, ensure that it is properly secured and marked with flags or warning lights. Check with local authorities for any specific regulations or restrictions regarding the transportation of agricultural equipment on public roads. It is of the utmost importance to transport safely and respectfully for all others on the road.

Maintenance and Service

Regular Maintenance Schedule

Maintaining your John Deere R72 Combine is crucial for ensuring its longevity and optimal performance during harvest season. A well-maintained combine minimizes downtime, reduces the risk of costly repairs, and maximizes your yield. This section outlines a comprehensive maintenance schedule that should be followed diligently. This schedule covers daily, weekly, monthly, and annual checks and services, ensuring every component is functioning correctly. Remember, proper maintenance is not just about fixing things when they break, it's about preventing breakdowns in the first place. Consistent adherence to this schedule will significantly extend the life of your combine and improve its overall efficiency.

Daily maintenance should focus on the most critical and frequently used components. This includes checking engine oil levels, coolant levels, and all fluid levels. You should also inspect all belts and chains for proper tension and any signs of wear or damage. A quick visual inspection of the tires for proper inflation and any cuts or abrasions is essential. Finally, grease all easily accessible lubrication points to ensure smooth operation of moving parts. Don't forget to consult your combine's operation manual for specific recommendations for your model.

Weekly maintenance involves a more detailed inspection of key components. Check the condition of the cutting platform, including the knives and guards, and ensure they are properly aligned and functioning. Inspect the header drive system for any signs of wear or looseness. Check the grain tank and unloading auger for any blockages or damage. Verify that the lights, signals, and warning indicators are functioning correctly. Regular cleaning of accumulated debris, such as chaff and straw, around the engine and other critical areas is essential to prevent overheating and fire hazards.

Monthly maintenance requires a more in-depth examination and service of various systems. This includes inspecting the threshing and separating components, such as the rotor and concave, for wear and damage. Check the cleaning system, including the sieves and fan, for proper adjustment and operation. Lubricate all less-frequently accessed lubrication points. Inspect the electrical system for loose connections, corroded terminals, and damaged wiring. Replace any worn or damaged components that could potentially lead to a breakdown during harvest.

Annual maintenance should be a comprehensive overhaul performed at the end of each harvest season. This includes draining and replacing all fluids, including engine oil, hydraulic fluid, and coolant. Replace all filters, including air filters, fuel filters, and oil filters. Thoroughly inspect the engine, transmission, and hydraulic system for any signs of wear or damage. Check and adjust the valve clearances. Inspect the tires for wear and damage and replace them if necessary. Consider having a qualified John Deere technician perform a complete inspection and diagnostic check to identify any potential issues before the next harvest season.

Lubrication Points and Procedures

Proper lubrication is paramount to the smooth and efficient operation of your John Deere R72 Combine. Lack of lubrication leads to increased friction, accelerated wear, and premature failure of critical components. This section outlines the key lubrication points and procedures to ensure your combine is adequately lubricated. Remember, using the correct type of lubricant is just as important as lubricating regularly. Always consult your combine's operation manual for specific lubricant recommendations for each lubrication point. Using the wrong type of lubricant can cause damage and reduce the lifespan of your components.

Locating the lubrication points on your combine is the first step. Refer to the lubrication diagram in your operator's manual, which provides a detailed map of all grease fittings and oil fill points. Common lubrication points include bearings, bushings, pivots, and gears. These components are subject to high levels of friction and require regular lubrication to prevent wear. Pay close attention to areas that are exposed to dust, dirt, and moisture, as these contaminants can accelerate wear and degradation of the lubricant.

Before lubricating, clean the grease fittings to remove any dirt or debris. Use a grease gun with the appropriate nozzle to apply grease to the fittings. Pump grease into the fitting until fresh grease appears, indicating that the old grease has been purged. Be careful not to over-grease, as this can damage seals and attract more dirt. For oil fill points, use a clean funnel to add oil to the specified level. Check the oil level frequently and add oil as needed to maintain the proper level.

Different components require different types of lubricants. Engine oil is used to lubricate the engine, while hydraulic fluid is used to lubricate the hydraulic system. Grease is used to lubricate bearings, bushings, and pivots. Gear oil is used to lubricate gears. Always use the recommended lubricant for each specific application. Mixing different types of lubricants can cause chemical reactions that degrade the lubricant and damage your components. Store lubricants in a clean, dry place to prevent contamination.

Establish a regular lubrication schedule based on the operating conditions and the recommendations in your operator's manual. Components that are subject to high loads, high speeds, or harsh environments may require more frequent lubrication. Record the date of each lubrication and the amount of lubricant used. This will help you track your lubrication schedule and identify any potential problems. Regular lubrication is a simple and cost-effective way to extend the life of your combine and prevent costly repairs.

Belt and Chain Inspection and Replacement

Belts and chains are vital components in the power transmission system of your John Deere R72 Combine. They transfer power from the engine to various components, such as the header, threshing cylinder, and cleaning fan. Worn or damaged belts and chains can lead to reduced performance, increased fuel consumption, and even complete breakdowns. Regular inspection and timely replacement are crucial for maintaining the optimal performance and reliability of your combine. Neglecting these components can lead to significant downtime during the critical harvest season. Always prioritize their upkeep.

Begin by visually inspecting all belts for signs of wear, such as cracks, fraying, glazing, or missing sections. Check the belt tension and ensure it is within the specified range. Loose belts can slip, reducing power transmission efficiency and causing premature wear. Overtight belts can put excessive stress on bearings and other components. Use a belt tension gauge to accurately measure belt tension and adjust as needed. Refer to your combine's operation manual for specific belt tension recommendations.

Inspect chains for signs of wear, such as stretched links, worn sprockets, or rust. Check the chain tension and ensure it is within the specified range. Loose chains can jump off the sprockets, causing damage and downtime. Overtight chains can put excessive stress on the sprockets and bearings. Use a chain tension gauge to accurately measure chain tension and adjust as needed. Lubricate chains regularly with a chain lubricant to reduce friction and prevent rust.

When replacing belts, always use genuine John Deere replacement belts or belts that meet or exceed the original equipment manufacturer (OEM) specifications. Aftermarket belts may not have the same quality or durability as OEM belts. Install the new belt according to the instructions in your operation manual. Ensure the belt is properly seated in the pulleys and that the tension is correctly adjusted. After installing a new belt, check the tension after the first few hours of operation and adjust as needed.

When replacing chains, always use genuine John Deere replacement chains or chains that meet or exceed the OEM specifications. Install the new chain according to the instructions in your operation manual. Ensure the chain is properly seated on the sprockets and that the tension is correctly adjusted. Lubricate the new chain with a chain lubricant. After installing a new chain, check the tension after the first few hours of operation and adjust as needed.

Filter Replacement Guide

Filters are essential for protecting the engine, hydraulic system, and other critical components of your John Deere R72 Combine from contaminants. Filters remove dirt, debris, and other particles from fluids and air, preventing them from causing wear and damage. Regular filter replacement is crucial for maintaining the optimal performance and longevity of your combine. Neglecting filter replacement can lead to reduced engine power, increased fuel consumption, and even catastrophic engine failure. A small investment in filters can save you thousands of dollars in repairs down the road.

Identify all the filters on your combine. Common filters include air filters, fuel filters, oil filters, hydraulic filters, and coolant filters. Refer to your combine's operation manual for the location and replacement intervals of each filter. Air filters remove dust and debris from the air entering the engine, preventing wear and damage. Fuel filters remove contaminants from the fuel, preventing them from clogging the fuel injectors and reducing engine performance. Oil filters remove contaminants from the engine oil, preventing wear and damage to the engine components. Hydraulic filters remove contaminants from the hydraulic fluid, preventing wear and damage to the hydraulic system. Coolant filters remove contaminants from the coolant, preventing corrosion and scaling in the cooling system.

Before replacing a filter, ensure the engine is turned off and has cooled down. Use the correct tools and procedures for removing and installing the filter. Follow the instructions in your operation manual. When removing a filter, be careful not to spill any fluids. Use a drain pan to collect any spilled fluids. Dispose of used filters properly according to local regulations. Do not reuse old filters, as they will no longer be effective at removing contaminants.

When installing a new filter, lubricate the gasket with clean oil. This will help ensure a proper seal and prevent leaks. Tighten the filter to the specified torque. Do not overtighten the filter, as this can damage the gasket. After installing a new filter, check for leaks. Start the engine and let it run for a few minutes. Check around the filter for any signs of leaks. If you find any leaks, tighten the filter slightly. If the leak persists, remove the filter and inspect the gasket. Replace the gasket if necessary and reinstall the filter.

Use genuine John Deere replacement filters or filters that meet or exceed the OEM specifications. Aftermarket filters may not have the same quality or efficiency as OEM filters. Replace filters at the recommended intervals. More frequent filter replacement may be necessary in harsh operating conditions. Keep a record of all filter replacements. This will help you track your maintenance schedule and ensure that filters are replaced on time.

Troubleshooting Common Issues

Even with proper maintenance, your John Deere R72 Combine may experience occasional issues. This section provides troubleshooting tips for some common problems. Before attempting any repairs, consult your combine's operation manual and follow all safety precautions. If you are not comfortable performing the repairs yourself, contact a qualified John Deere technician. Attempting repairs without proper knowledge and training can be dangerous and can damage your combine. Prioritize your safety and the integrity of the machine above all else.

Engine won't start: Check the fuel level, battery voltage, and starter motor. Ensure the fuel shut-off valve is open. Check the spark plugs or glow plugs. If the engine is still not starting, consult a qualified technician. This issue could stem from multiple problems.

Engine overheating: Check the coolant level, radiator cap, and cooling fan. Clean the radiator and engine block of any debris. If the engine is still overheating, consult a qualified technician. Overheating may mean there is a leak in the cooling system.

Header not working: Check the header drive belt, clutch, and hydraulic system. Ensure the header is properly engaged. If the header is still not working, consult a qualified technician.

Threshing problems: Check the rotor speed, concave clearance, and feeder house. Adjust the settings as needed. If the threshing problems persist, consult a qualified technician.

Cleaning problems: Check the sieve settings, fan speed, and chaffer extension. Adjust the settings as needed. If the cleaning problems persist, consult a qualified technician. Cleaning problems can lead to losses in grain.

John Deere R72 Combine Manual: Your Comprehensive Guide

Repair and Overhaul

Engine Repair and Maintenance

The heart of your John Deere R72 Combine is, without a doubt, its engine. Regular maintenance is paramount to ensuring peak performance and minimizing downtime during critical harvesting periods. This section will guide you through essential engine maintenance procedures, from routine oil changes to more complex tasks such as valve adjustments. Pay close attention to the recommended service intervals outlined in your machine's operator's manual, and always use genuine John Deere parts and fluids to maintain optimal engine health and longevity. Neglecting even minor maintenance tasks can lead to significant engine problems down the line, resulting in costly repairs and lost productivity, so adherence to the schedule is key.

Performing an engine oil change is a relatively simple task, but it's crucial for removing contaminants and maintaining proper lubrication. Always ensure the engine is cool before draining the oil to avoid burns. Refer to your operator's manual for the correct oil type and quantity, as using the wrong oil can damage internal engine components. When replacing the oil filter, be sure to lubricate the new filter's gasket with fresh oil to ensure a proper seal. Check the oil level regularly between changes, and top up as needed to maintain the correct level. This proactive approach will ensure your engine operates smoothly and efficiently throughout the harvest season.

Beyond oil changes, other vital engine maintenance tasks include air filter cleaning or replacement, fuel filter replacement, and coolant system maintenance. A clogged air filter can restrict airflow, leading to reduced engine performance and increased fuel consumption. Inspect the air filter regularly and clean or replace it as needed. Similarly, a dirty fuel filter can starve the engine of fuel, causing rough running and stalling. Replace the fuel filter according to the recommended service interval. The cooling system is critical for preventing overheating, so ensure the coolant level is correct and the system is free of leaks. Regularly inspect hoses and clamps for signs of wear or damage, and replace them as needed to prevent coolant loss and engine overheating. Diligence in these areas will maximize the lifespan of your engine.

Hydraulic System Repair

The hydraulic system in your R72 Combine is a complex network of pumps, valves, cylinders, and hoses, responsible for powering numerous functions, including header height control, reel speed adjustment, and unloading auger operation. A well-maintained hydraulic system is crucial for efficient operation and preventing costly downtime. This section will cover common hydraulic system issues, troubleshooting techniques, and repair procedures. Remember to always relieve pressure in the hydraulic system before disconnecting any lines or components to prevent injury.

One of the most common hydraulic system problems is leaks. Hydraulic leaks can lead to reduced system pressure, decreased performance, and environmental contamination. Inspect all hoses, fittings, and cylinders regularly for signs of leaks. Tighten loose fittings or replace damaged hoses or seals as needed. When replacing hydraulic hoses, be sure to use the correct type and size, and ensure they are properly crimped to prevent future leaks. Clean up any spilled hydraulic fluid immediately to prevent slips and falls and to minimize environmental impact. Promptly addressing hydraulic leaks will maintain optimal system performance and prevent further damage.

Another common issue is a malfunctioning hydraulic pump. A worn or damaged pump can result in reduced system pressure and slow or erratic operation of hydraulic functions. To diagnose a faulty pump, use a hydraulic pressure gauge to check the system pressure at various points in the system. If the pressure is low, the pump may need to be rebuilt or replaced. When replacing a hydraulic pump, be sure to flush the hydraulic system to remove any contaminants that may have accumulated. Using clean hydraulic fluid and a clean system will prolong the life of the new pump and prevent future problems. Regular hydraulic system maintenance will save considerable time and money in the long run.

Electrical System Troubleshooting

The electrical system in your John Deere R72 is integral to its operation, controlling everything from starting the engine to monitoring critical machine functions. Modern combines rely heavily on electronic control units (ECUs) and sensors, making a reliable electrical system essential. This section covers common electrical system problems, troubleshooting techniques, and repair procedures. Always disconnect the battery before working on the electrical system to prevent accidental shorts and potential damage. Consult your operator's manual for wiring diagrams and component locations.

A common electrical problem is a dead battery. A dead battery can prevent the engine from starting and can disrupt other electrical functions. Check the battery voltage with a voltmeter to determine its state of charge. If the voltage is low, charge the battery using a battery charger. If the battery does not hold a charge, it may need to be replaced. Also, inspect the battery terminals and cables for corrosion. Clean any corrosion with a wire brush and apply a corrosion inhibitor to prevent future corrosion. A well-maintained battery is crucial for reliable starting and electrical system performance.

Another frequent electrical issue involves faulty wiring. Wires can become damaged due to vibration, heat, or exposure to the elements. Inspect wiring harnesses for signs of damage, such as frayed insulation or broken wires. Use a multimeter to check for continuity in the wiring circuits. Repair or replace damaged wires as needed. Ensure all connections are clean and secure. Loose or corroded connections can cause intermittent electrical problems that are difficult to diagnose. Taking the time to thoroughly inspect and repair the wiring harness will ensure a reliable electrical system and prevent frustrating breakdowns in the field.

Header and Feeder House Maintenance

The header and feeder house are the initial point of contact between the combine and the crop, making their proper function crucial for efficient harvesting. These components are subjected to significant wear and tear, requiring regular inspection and maintenance. This section will guide you through essential header and feeder house maintenance procedures, helping you minimize crop loss and maximize harvesting efficiency. Keep safety in mind whenever working on the header, ensuring it's properly supported and disconnected from the combine's power system.

Regularly inspect the header knives or cutter bar for damage or wear. Dull or damaged knives can result in uneven cutting and increased crop loss. Sharpen or replace the knives as needed to maintain a clean and efficient cut. Also, check the knife sections for proper alignment and tightness. Loose knife sections can cause excessive vibration and premature wear. Lubricate the knife drive mechanism regularly to ensure smooth operation and prevent overheating. Proper knife maintenance will minimize crop loss and improve harvesting efficiency.

The feeder house is responsible for conveying the crop material from the header to the threshing system. Inspect the feeder house chains and sprockets for wear and damage. Replace worn or damaged chains and sprockets to prevent breakdowns and ensure smooth crop flow. Adjust the chain tension as needed to maintain proper alignment and prevent slippage. Lubricate the feeder house bearings regularly to ensure smooth operation and prevent overheating. Keeping the feeder house in good condition will prevent crop plugging and maintain optimal threshing performance. Don't neglect the small details, as they can have a big impact on overall harvesting efficiency.

Threshing and Separating System Repair

The threshing and separating system is responsible for separating the grain from the chaff and straw. Proper adjustment and maintenance of this system are critical for maximizing grain yield and minimizing grain loss. This section will cover common threshing and separating system problems, troubleshooting techniques, and repair procedures. Understanding how the different components of this system interact is essential for effective troubleshooting.

One of the most common threshing problems is excessive grain loss. This can be caused by improper concave settings, excessive rotor speed, or worn threshing elements. Adjust the concave clearance according to the crop being harvested. Refer to your operator's manual for recommended settings. Reduce the rotor speed if grain damage is excessive. Inspect the threshing elements, such as rasp bars or rotor bars, for wear and damage. Replace worn or damaged elements as needed. Proper adjustment and maintenance of the threshing system will minimize grain loss and maximize grain yield.

The separating system removes the remaining grain from the chaff and straw. Inspect the separating grates and screens for damage or plugging. Clean the grates and screens regularly to ensure proper airflow and separation. Adjust the separating fan speed according to the crop being harvested. Excessive fan speed can blow grain out of the combine, while insufficient fan speed can result in grain loss in the tailings. Proper adjustment and maintenance of the separating system will minimize grain loss and improve grain quality. A little extra attention to detail here can significantly increase your harvest yield.

Cleaning System Maintenance

The cleaning system removes the remaining chaff and debris from the grain, delivering a clean sample to the grain tank. Proper maintenance of the cleaning system is essential for producing high-quality grain. This section will cover common cleaning system problems, troubleshooting techniques, and repair procedures. A clean grain sample translates to higher profits and satisfied customers.

One of the most common cleaning system problems is excessive dockage in the grain tank. This can be caused by improper sieve settings, excessive fan speed, or worn sieves. Adjust the sieve openings according to the crop being harvested. Refer to your operator's manual for recommended settings. Reduce the fan speed if grain is being blown out of the combine. Inspect the sieves for wear and damage. Replace worn sieves to ensure proper cleaning performance. Consider experimenting with different sieve configurations to optimize cleaning for different crops. The rewards of a well-maintained cleaning system are substantial, both in terms of grain quality and reduced cleaning costs at the elevator.

Another common issue is overloading the cleaning system. This can happen when the threshing or separating system is not functioning properly, resulting in excessive chaff and straw entering the cleaning system. Address any problems with the threshing or separating system before attempting to adjust the cleaning system. Ensure the cleaning system is not being overloaded, and adjust the settings as needed to achieve a clean grain sample. A properly functioning and well-maintained cleaning system ensures you deliver high-quality grain, maximizing your profit potential at the elevator. Regular checks will pay dividends throughout the harvest season.

Parts and Diagrams

Exploded Diagrams of Key Components

Understanding the internal workings of your John Deere R72 Combine is crucial for effective maintenance and repair. This section provides detailed exploded diagrams of key components such as the engine, transmission, header, cleaning shoe, and threshing unit. Each diagram clearly illustrates how the various parts fit together, making it easier to identify individual components and understand their relationship to the overall system. Use these diagrams as a visual aid when disassembling and reassembling machinery, ensuring proper alignment and function.

Each exploded diagram is accompanied by a corresponding parts list, providing part numbers and descriptions. This allows for quick and accurate identification of the necessary components for repair or replacement. Pay close attention to the orientation of parts within the diagram, as incorrect reassembly can lead to malfunction and further damage. Keep a clean workspace and organize disassembled parts to prevent loss or confusion during the reassembly process. Cross-reference the diagrams with the troubleshooting guides in other chapters to pinpoint the source of mechanical problems.

Parts List and Identification

This section provides a comprehensive parts list for the John Deere R72 Combine, detailing each component's name, part number, and a brief description of its function. The parts are organized by major assemblies, such as the engine, transmission, header, cleaning shoe, and electrical system, making it easier to locate specific items. Accurate part identification is essential for ordering the correct replacements and avoiding costly mistakes. Refer to the exploded diagrams in the previous section to visually confirm the location and orientation of each part.

When identifying parts, pay close attention to any distinguishing features, such as markings, dimensions, or unique shapes. Note the serial number of your combine, as some parts may vary depending on the model year or production run. Use the parts list in conjunction with the exploded diagrams to ensure accurate identification and ordering. Always consult the manufacturer's specifications for torque values and tightening sequences when reassembling components. Careful attention to detail will help ensure proper function and extend the lifespan of your equipment.

Ordering Replacement Parts

When ordering replacement parts for your John Deere R72 Combine, accuracy and precision are essential. Begin by identifying the correct part number using the parts list and exploded diagrams provided in this chapter. Contact your local John Deere dealer or authorized parts supplier to place your order. Be prepared to provide the year, model, and serial number of your combine to ensure you receive the correct parts. Always request genuine John Deere parts to maintain the performance and reliability of your machine; while aftermarket alternatives may seem cheaper, they often lack the quality and durability of OEM components.

When ordering, inquire about any applicable warranties or return policies. Carefully inspect the replacement parts upon arrival to ensure they match the specifications and dimensions of the original components. If you are unsure about the compatibility of a part, consult with a qualified mechanic or John Deere service representative before installation. Keep records of all part orders, including the date, part numbers, supplier, and invoice number, for future reference. Proper documentation can be invaluable when troubleshooting issues or making warranty claims. By following these guidelines, you can streamline the parts ordering process and minimize downtime for your John Deere R72 Combine.

Storage and Winterization

Preparing the Combine for Storage

Proper storage is crucial for the longevity and performance of your John Deere R72 Combine. Neglecting to prepare your combine for an extended period of inactivity, such as during the winter months, can lead to significant issues down the road. These issues can range from corrosion and component degradation to fuel system problems and battery failure. A thorough preparation ensures that your combine is ready to go when the next harvest season arrives, saving you time, money, and headaches in the long run.

The first step in preparing your combine for storage is a comprehensive cleaning. Remove all crop residue, dirt, and debris from the machine using compressed air, a pressure washer (with appropriate caution around electrical components), and hand tools. Pay close attention to areas where moisture can accumulate, such as the grain tank, the cleaning shoe, and the engine compartment. This will help prevent corrosion and pest infestations during storage. A clean machine is much easier to inspect and maintain.

Once cleaned, thoroughly inspect the combine for any signs of damage or wear. Check belts, hoses, tires, and hydraulic lines for cracks, leaks, or other defects. Address any issues you find immediately to prevent them from worsening during storage. Replace worn or damaged parts now to avoid delays and potential breakdowns when you need the combine most. Careful inspection and pre-emptive maintenance can save a considerable amount of time in the Spring.

Winterization Procedures

Winterization is more than just putting your combine away; it's about actively protecting it from the harsh elements of winter. Start by draining all fluids, including engine oil, coolant, and fuel. Used engine oil contains contaminants that can corrode internal engine components, so a fresh oil change before storage is highly recommended. Check the owner’s manual for the correct type of oil to use and follow the manufacturer’s recommended procedures. Similarly, replace the coolant with a fresh mixture of antifreeze and distilled water to prevent freezing and corrosion. Drain the fuel tank to prevent fuel degradation and condensation buildup.

To protect the fuel system, especially if you are storing in an environment with temperature fluctuations, consider adding a fuel stabilizer to any remaining fuel, or completely draining the fuel and fogging the engine. This will prevent the fuel from breaking down and forming varnish, which can clog fuel injectors and other fuel system components. Fogging oil coats the internal parts of the engine with a protective film, preventing corrosion. Follow the fogging oil manufacturer's instructions carefully to ensure proper application. Remember to dispose of used fluids responsibly and in accordance with local regulations.

Remove the battery and store it in a cool, dry place. Clean the battery terminals and check the electrolyte levels. Use a battery maintainer or trickle charger to keep the battery fully charged throughout the winter. A fully charged battery is less susceptible to freezing and sulfation, which can shorten its lifespan. If you are unable to use a trickle charger, check the battery voltage regularly and charge it as needed. Consider storing the battery inside a climate-controlled environment for optimal protection.

Post-Storage Inspection

Before putting your John Deere R72 Combine back into service after storage, a thorough post-storage inspection is essential. This will help you identify any potential problems that may have developed during the storage period and prevent breakdowns during the busy harvest season. Start by checking all fluid levels, including engine oil, coolant, hydraulic fluid, and fuel. Top off any fluids as needed, using the correct type of fluid as specified in the owner's manual. Verify there are no leaks.

Reinstall the battery and check all electrical connections for corrosion or damage. Clean any corroded terminals and tighten all connections. Start the combine and listen for any unusual noises or vibrations. Check the operation of all lights, gauges, and electrical systems. If you notice any problems, diagnose and repair them before putting the combine into service. Letting an issue linger can make it worse.

Finally, before heading into the field, perform a test run to ensure that all systems are functioning correctly. Engage the threshing mechanism, the cleaning shoe, and the unloading auger. Check for any signs of leaks, overheating, or other problems. If everything appears to be in good working order, you're ready to go. A little time spent on a thorough post-storage inspection can prevent costly breakdowns and downtime during the harvest season, ensuring a smooth and productive operation.