Operating a John Deere 4720 tractor requires a diligent understanding of all safety protocols to ensure both the operator's well-being and the longevity of the machine. Throughout this manual and on the tractor itself, you will encounter various safety symbols and messages. These symbols are designed to immediately alert you to potential hazards and guide you in taking appropriate preventative measures. Familiarize yourself with the meaning of each symbol, including the severity of the risk it represents, which can range from potential minor injuries to serious harm or even death. Carefully read and thoroughly understand each safety message before operating or servicing the tractor; your comprehension can be the difference between a safe and hazardous situation.
Key safety symbols to recognize include those indicating danger, warning, and caution. "Danger" signifies an immediate and serious hazard that will result in severe injury or death if not avoided. "Warning" indicates a potentially hazardous situation that, if not avoided, could result in severe injury or death. "Caution" signifies a potentially hazardous situation that may result in minor or moderate injury if not avoided. Each symbol is often accompanied by a written message describing the specific hazard and the necessary precautions to take. Pay close attention to the wording and follow all instructions meticulously to minimize risk.
Beyond the specific symbols and warnings, adhering to general safety precautions is paramount when working with any heavy machinery. Before operating the John Deere 4720, perform a thorough walk-around inspection to identify any potential hazards, such as loose components, fluid leaks, or damaged guards. Ensure that all safety shields and guards are properly in place and securely fastened before starting the engine. Never operate the tractor if any safety features are missing or damaged, as they are designed to protect you from moving parts and other potential dangers. Immediate repairs or replacements are essential to ensure safe operation.
Always maintain a clean and uncluttered workspace around the tractor, free from tools, debris, and other obstructions. This will help prevent slips, trips, and falls, which are common causes of accidents. Be mindful of your surroundings at all times, and be aware of the location of other people, animals, or obstacles. Avoid operating the tractor near unprotected power lines, steep slopes, or unstable ground. Before starting the engine, always ensure that the transmission is in neutral or park and that the parking brake is engaged to prevent unexpected movement.
Wearing appropriate Personal Protective Equipment (PPE) is crucial for protecting yourself from potential injuries while operating or servicing the John Deere 4720. Eye protection, such as safety glasses or goggles, is essential to shield your eyes from flying debris, dust, and other particles that can cause serious eye damage. Hearing protection, such as earplugs or earmuffs, is necessary to protect your hearing from the loud noise generated by the engine and other operating components, as prolonged exposure to high noise levels can lead to permanent hearing loss. Always choose PPE that meets or exceeds the recommended safety standards and is appropriate for the specific task you are performing.
Sturdy footwear, such as work boots with slip-resistant soles, is vital for providing adequate foot protection and preventing slips and falls. Gloves should be worn to protect your hands from cuts, abrasions, and contact with harmful chemicals or fluids. Depending on the task, additional PPE may be required, such as a respirator for dusty environments or a hard hat when working in areas where there is a risk of falling objects. Inspect your PPE regularly for wear and tear, and replace it as needed to ensure its continued effectiveness. Remember, PPE is your last line of defense against potential hazards.
Safe operation practices extend beyond just knowing the controls; they involve a consistent and mindful approach to operating the machine. Always start the engine in a well-ventilated area to avoid exposure to harmful exhaust fumes. Before moving the tractor, ensure that the area is clear of people, animals, and obstacles, and sound the horn to alert others of your intentions. Operate the tractor at a safe speed, taking into account the terrain, load, and visibility conditions. Avoid sudden starts, stops, and turns, as these can cause loss of control or rollovers, especially on uneven ground.
When operating on slopes, always follow the manufacturer's recommendations for safe operating procedures, which typically involve keeping the heavy end of the tractor uphill. Never attempt to operate the tractor across a steep slope, as this significantly increases the risk of rollover. Use caution when operating near ditches, embankments, or other drop-offs, and avoid getting too close to the edge. When transporting implements or attachments, ensure that they are properly secured and balanced to prevent instability. Always lower implements to the ground when not in use and engage the parking brake before dismounting the tractor.
Regular maintenance and inspections are an integral part of safe operation. Keeping the tractor in good working condition not only prolongs its life but also reduces the risk of accidents caused by mechanical failures. Follow the manufacturer's recommended maintenance schedule for tasks such as checking fluid levels, lubricating moving parts, and inspecting brakes and tires. Address any repairs or maintenance issues promptly to prevent them from escalating into more serious problems. By adhering to safe operation practices and prioritizing preventative maintenance, you can significantly reduce the risk of accidents and ensure a safe and productive working environment.
Before you even think about firing up the engine of your John Deere 4720, it’s crucial to familiarize yourself with the location and function of all the controls and instruments. This includes the steering wheel, throttle, brake pedals (both individual and combined), clutch pedal (if applicable), transmission shifter, hydraulic levers, PTO engagement lever, and the 3-point hitch control lever. Locate each control and practice operating them, even with the engine off, to build muscle memory and ensure a safe and efficient operating experience. Knowing exactly where everything is will be invaluable when you're navigating tricky terrain or working with heavy implements in the field. Furthermore, understanding the instruments on the dashboard, such as the tachometer, fuel gauge, temperature gauge, and warning lights, is vital for monitoring the tractor's performance and identifying potential problems early on.
The instrument panel on your 4720 provides critical feedback about the tractor's operational status. The tachometer displays engine speed in revolutions per minute (RPM), which is essential for optimizing performance and avoiding over-revving the engine. The fuel gauge obviously indicates the remaining fuel level, preventing unexpected downtime in the field. Keep a close eye on the temperature gauge, as overheating can cause severe engine damage. Familiarize yourself with the meaning of each warning light; these lights can indicate low oil pressure, charging system malfunction, or other critical issues that require immediate attention. Regularly checking these instruments will contribute to the longevity and reliability of your John Deere 4720.
Starting your John Deere 4720 requires following a specific procedure to ensure proper engine start and prevent potential damage. First, make sure the transmission is in neutral and the parking brake is engaged. Next, insert the key and turn it to the "ON" position, allowing the instrument panel to illuminate and the fuel pump to prime (if equipped). Then, turn the key further to the "START" position and hold it there until the engine starts. Release the key immediately once the engine starts to avoid damaging the starter motor. If the engine fails to start after a few seconds, release the key, wait a moment, and try again. In cold weather, you may need to use the glow plugs (if equipped) to preheat the cylinders for easier starting.
Properly shutting down the engine is just as important as starting it. Allow the engine to idle for a few minutes to cool down gradually, especially after heavy use. This prevents thermal shock and extends the life of engine components. Then, turn the key to the "OFF" position. Make sure all implements are lowered to the ground and the parking brake is engaged before leaving the tractor. Finally, remove the key for security. Never abruptly shut down the engine under heavy load; always allow it to cool down at idle first.
The John Deere 4720 features a transmission designed to provide a range of speeds for various tasks. The transmission allows you to select the appropriate gear for the job, whether it's low-speed, high-torque work like pulling heavy implements or higher-speed transport between fields. Understanding the gear ranges and how to shift smoothly is crucial for efficient and safe operation. Always use the clutch (if equipped) when shifting gears to prevent damage to the transmission. Practice shifting in a safe area to become comfortable with the transmission's operation.
Many 4720 models also feature a four-wheel drive (4WD) system. Engage the 4WD when you need extra traction in slippery or challenging conditions. However, avoid using 4WD on hard, dry surfaces, as this can cause driveline binding and damage. Disengage the 4WD when it's no longer needed to improve fuel efficiency and reduce wear on the drivetrain components. Regularly inspect the tires for proper inflation and wear, as this affects both traction and handling.
The hydraulic system on your John Deere 4720 powers a variety of implements and attachments, providing the force needed for lifting, tilting, and other functions. Familiarize yourself with the location and operation of the hydraulic levers or controls. These controls allow you to raise and lower implements, adjust their position, and operate hydraulic cylinders. Smooth and precise operation of the hydraulic controls is essential for efficient and safe operation of implements.
Before operating any implement that uses the hydraulic system, ensure that the hydraulic hoses are properly connected and secured. Check for any leaks or damage to the hoses and fittings. Always relieve the hydraulic pressure before disconnecting any hoses. Understand the flow rate and pressure requirements of the implement you are using to avoid overloading the hydraulic system. Regularly inspect the hydraulic fluid level and condition, and change the fluid according to the manufacturer's recommendations.
The John Deere 4720 is a versatile tractor capable of handling a wide range of implements. Before attaching any implement, carefully read the implement's operator's manual to understand its proper operation and safety precautions. Ensure that the implement is compatible with the 4720's hydraulic and PTO systems. Follow the manufacturer's instructions for attaching the implement to the tractor's 3-point hitch or drawbar.
When operating an implement, always be aware of your surroundings and maintain a safe distance from obstacles and other people. Operate the implement at a safe speed and avoid making sudden turns or stops. Regularly inspect the implement for any signs of wear or damage. Keep the implement properly lubricated and maintained to ensure its optimal performance and longevity. Never operate an implement that is damaged or malfunctioning.
The Power Take-Off (PTO) system on the John Deere 4720 provides rotational power to implements such as mowers, tillers, and balers. Before engaging the PTO, ensure that the implement is properly attached and that all safety shields are in place. Understand the PTO speed requirements of the implement you are using and select the appropriate PTO speed setting on the tractor.
Never engage the PTO with the engine at high RPM. Gradually increase the engine speed after engaging the PTO. Always disengage the PTO before getting off the tractor or making any adjustments to the implement. Regularly inspect the PTO shaft and driveline for any signs of wear or damage. Keep the PTO shaft properly lubricated and maintain the safety shields to prevent accidents. Never wear loose clothing or jewelry when operating implements powered by the PTO.
The 3-point hitch is a critical system for attaching and operating many implements. Always inspect the hitch components before use, ensuring all pins and locking mechanisms are secure. Make sure the implement is correctly sized and weighted for the tractor's capabilities. Incorrectly sized implements can overload the hitch or compromise stability.
When attaching an implement, ensure the tractor is on a level surface and the engine is off. Carefully position the implement and align the hitch arms. Use the hitch control lever to raise or lower the arms, making connections. Double-check that all locking pins are in place and securely fastened. Before operating the implement, raise it slightly to confirm it's properly attached and balanced. Never exceed the tractor's or implement's weight limits. Uneven weight distribution can cause tipping or loss of control, creating dangerous situations.
Maintaining your John Deere 4720 tractor according to the recommended schedule is crucial for ensuring its longevity, optimal performance, and minimizing costly repairs. Adhering to the maintenance intervals outlined in this chapter will help you identify potential issues early on, preventing them from escalating into major problems. A proactive approach to maintenance not only extends the life of your tractor but also maximizes its resale value should you ever decide to upgrade. Regular maintenance enhances the efficiency of your operations by minimizing downtime and ensuring that your tractor is always ready to perform at its best. Think of scheduled maintenance as an investment in the future of your 4720, guaranteeing its reliability for years to come.
The maintenance schedule is divided into various intervals, typically based on operating hours or calendar time, whichever comes first. These intervals include daily, weekly, monthly, and annual checks and services. Each interval addresses specific components and systems of the tractor, focusing on areas that are prone to wear and tear or require periodic attention. Ignoring these scheduled services can lead to decreased performance, increased fuel consumption, and ultimately, equipment failure. Therefore, understanding and consistently following the maintenance schedule is paramount for every 4720 owner.
Proper engine maintenance is the heart of keeping your John Deere 4720 running smoothly. Regular oil changes are essential, as oil lubricates the engine's moving parts, reducing friction and preventing wear. Over time, engine oil degrades and becomes contaminated with dirt, debris, and combustion byproducts, diminishing its lubricating properties. Consult your operator's manual for the recommended oil change interval, typically based on operating hours. Always use the correct type of oil specified by John Deere to ensure optimal engine performance and longevity.
Along with oil changes, replacing the oil filter is equally important. The oil filter removes contaminants from the oil, preventing them from circulating through the engine and causing damage. Replacing the filter at each oil change ensures that the fresh oil remains clean and effective. Similarly, air filters, both the primary and secondary, need regular inspection and replacement. A clean air filter ensures that the engine receives a sufficient supply of clean air for combustion, maximizing fuel efficiency and power. A clogged air filter restricts airflow, leading to reduced performance and increased fuel consumption.
Coolant maintenance is another critical aspect of engine care. The coolant helps regulate the engine's temperature, preventing overheating and freezing. Over time, coolant can become acidic and lose its ability to protect the engine from corrosion. Regularly check the coolant level and condition, and flush and replace the coolant according to the recommended interval. Using the correct type of coolant, as specified by John Deere, is essential to prevent damage to the engine's cooling system.
The transmission and hydraulic systems are vital for the operation of your John Deere 4720. The transmission transfers power from the engine to the wheels, while the hydraulic system powers various implements and attachments. Maintaining these systems properly ensures smooth operation and prevents costly repairs. Regularly check the transmission and hydraulic fluid levels, and top them off as needed with the recommended fluid type. Low fluid levels can lead to decreased performance and potential damage to the system components.
Changing the transmission and hydraulic filters is also essential. These filters remove contaminants from the fluid, preventing them from circulating through the system and causing wear. Follow the recommended filter change interval in your operator's manual. Inspect the hydraulic hoses and fittings for leaks or damage. Leaks can lead to loss of fluid and reduced hydraulic pressure, affecting the performance of implements. Replace any damaged hoses or fittings immediately to prevent further problems.
Pay attention to any unusual noises or vibrations coming from the transmission or hydraulic system. These could be signs of underlying problems that need to be addressed. If you notice any issues, consult your John Deere dealer or a qualified mechanic for diagnosis and repair. Neglecting these systems can result in significant downtime and expensive repairs.
The electrical system powers various components of your John Deere 4720, including the starting system, lights, and electronic controls. Proper maintenance of the electrical system ensures reliable operation and prevents unexpected breakdowns. Regularly check the battery terminals for corrosion and clean them as needed. Corroded terminals can reduce the battery's ability to deliver power, leading to starting problems. Ensure that the battery is properly charged and in good condition. If the battery is weak or failing, replace it with a new one of the correct specification.
Inspect the wiring harness for any signs of damage, such as frayed wires or loose connections. Damaged wiring can cause short circuits and other electrical problems. Repair or replace any damaged wiring immediately. Check the fuses and relays in the electrical system and replace any that are blown or faulty. Blown fuses can indicate underlying problems that need to be addressed. Ensure that all lights are working properly, including headlights, taillights, and turn signals. Replace any burned-out bulbs promptly.
Pay attention to any unusual electrical issues, such as flickering lights or intermittent starting problems. These could be signs of underlying electrical problems that need to be addressed. If you are not comfortable working with electrical systems, consult a qualified mechanic for diagnosis and repair.
Proper tire and wheel maintenance is crucial for ensuring the safety, performance, and longevity of your John Deere 4720. Regularly check the tire pressure and inflate the tires to the recommended pressure. Incorrect tire pressure can affect the tractor's handling, fuel efficiency, and tire wear. Inspect the tires for any signs of damage, such as cuts, punctures, or bulges. Damaged tires can be dangerous and should be replaced immediately.
Check the wheel bolts and nuts for tightness. Loose wheel bolts or nuts can cause the wheels to wobble or even come off, leading to serious accidents. Tighten the wheel bolts or nuts to the specified torque. Rotate the tires periodically to ensure even wear. Rotating the tires helps to distribute the wear evenly, extending the life of the tires. Clean the wheels and tires regularly to remove dirt and debris. Dirt and debris can damage the tires and wheels over time.
Pay attention to any unusual vibrations or noises coming from the wheels. These could be signs of underlying problems that need to be addressed. If you are not comfortable performing tire and wheel maintenance, consult a qualified mechanic for assistance.
Lubrication is essential for reducing friction and wear on moving parts of your John Deere 4720. Regularly lubricate all grease fittings and lubrication points with the recommended grease. Consult your operator's manual for the location of lubrication points and the recommended lubrication intervals. Use a grease gun to apply grease to the fittings until grease begins to emerge from the joints. Wipe off any excess grease to prevent it from attracting dirt and debris.
Pay particular attention to lubrication points on steering linkages, suspension components, and implement hitches. These are areas that are subject to high stress and require regular lubrication to prevent wear. Lubricate all pivot points and moving parts on implements and attachments. Proper lubrication of implements and attachments ensures smooth operation and prevents damage.
Inspect all lubrication points for wear or damage. Replace any worn or damaged fittings. Regular lubrication is a simple and effective way to extend the life of your John Deere 4720 and prevent costly repairs. Make sure to use the correct type of lubricant based on the manufacturer recommendations. Using the wrong type of lubricant can cause serious problems. Regular inspection and proper maintenance will keep your tractor running well for years.
Engine problems can be frustrating and often complex, requiring a systematic approach to diagnose the issue. Before diving into complex repairs, always start with the basics. Check the fuel level, ensuring you haven't simply run out of diesel. Inspect the air filter for excessive dirt or debris, as a clogged air filter can drastically reduce engine performance and cause starting problems. Listen closely to the engine while attempting to start; unusual noises, such as knocking or grinding, can provide valuable clues about the nature of the problem. If the engine cranks but doesn't start, suspect fuel delivery or ignition issues. A visual inspection of the fuel lines and injectors may reveal leaks or blockages that are preventing fuel from reaching the engine.
If the engine starts but runs rough or stalls frequently, consider problems such as a malfunctioning fuel injector, faulty spark plug (if applicable), or an issue with the engine's timing. Excessive smoke from the exhaust, whether black, white, or blue, is another indicator of a specific type of engine problem. Black smoke usually signifies incomplete combustion due to a rich fuel mixture. White smoke often indicates water or coolant entering the combustion chamber, which could suggest a head gasket leak. Blue smoke typically points to oil burning, possibly caused by worn piston rings or valve stem seals. Remember, proper diagnosis is key before attempting any repairs to avoid potentially worsening the problem or incurring unnecessary expenses.
The transmission and drivetrain are critical for transferring power from the engine to the wheels. Common issues include difficulty shifting gears, slipping or jerking during acceleration, and unusual noises coming from the transmission area. Before assuming a major problem, check the transmission fluid level and condition. Low fluid levels can lead to poor shifting and potential damage to the transmission components. Contaminated or burnt-smelling fluid indicates internal wear and tear, potentially requiring a fluid change or even a complete transmission overhaul.
Examine the universal joints (U-joints) on the driveshaft for excessive play or looseness. Worn U-joints can cause vibrations and noise, eventually leading to failure if left unaddressed. Inspect the differential for leaks or unusual noises, as these could indicate a problem with the gears or bearings. If you experience difficulty engaging four-wheel drive (if equipped), check the linkage and actuators for proper operation. Always consult the service manual for specific troubleshooting steps and torque specifications when working on the transmission and drivetrain components. Regular maintenance, including fluid changes and lubrication, is crucial for extending the life of these critical systems.
The hydraulic system powers various functions on the 4720, including the loader, backhoe (if equipped), and power steering. Problems with the hydraulic system often manifest as slow or weak operation of these functions, or complete failure to operate. Start by checking the hydraulic fluid level, ensuring it is within the recommended range. Low fluid levels can lead to cavitation, a phenomenon where air bubbles form in the fluid, reducing its effectiveness and potentially damaging hydraulic components. Inspect the hydraulic lines and hoses for leaks, cracks, or kinks.
Examine the hydraulic cylinders for damage or leaks around the seals. A damaged cylinder can cause reduced performance or complete failure of the associated function. Check the hydraulic pump for unusual noises, such as whining or grinding, which could indicate internal wear or damage. If a specific function is not working, inspect the associated control valve for proper operation and ensure the linkage is not damaged or disconnected. When diagnosing hydraulic system problems, always relieve the pressure in the system before disconnecting any lines or components to prevent injury.
The electrical system is responsible for starting the engine, powering the lights, and controlling various other functions. Common electrical problems include a dead battery, starting problems, lights not working, and malfunctioning gauges. Start by checking the battery voltage and connections, ensuring the terminals are clean and free of corrosion. A weak battery may not provide enough power to start the engine or operate other electrical components effectively. Check the fuses for blown fuses, replacing any that are damaged.
Inspect the wiring harness for damage, such as frayed wires, loose connections, or signs of rodent damage. Use a multimeter to check for continuity and voltage at various points in the circuit to isolate the problem. If the starter motor is not engaging, check the starter solenoid and related wiring. If the lights are not working, check the bulbs and wiring, ensuring the ground connections are secure. Remember to consult the wiring diagram in the service manual for specific troubleshooting steps and component locations.
Before undertaking any repairs, ensure you have the necessary tools, equipment, and safety gear. Disconnect the battery to prevent accidental electrical shocks or short circuits. Consult the service manual for specific instructions and torque specifications. When removing components, label them clearly to ensure proper reassembly. Use appropriate solvents and cleaners to remove grease and dirt from parts before inspection. Always use genuine John Deere parts or high-quality aftermarket parts to ensure proper fit and performance.
When tightening bolts and nuts, use a torque wrench to ensure they are tightened to the correct specification. Over-tightening can damage the threads or break the bolt, while under-tightening can lead to loosening and potential failure. After completing the repair, double-check all connections and ensure everything is properly installed. Test the repaired system or component to verify it is functioning correctly before putting the tractor back into service. Proper planning and attention to detail are essential for successful repairs.
Checking fuses is often the first step in diagnosing electrical problems, as a blown fuse can interrupt the flow of electricity to a specific component or system. Locate the fuse box, which is typically located under the dashboard or near the battery. Consult the owner's manual or the fuse box diagram to identify the fuse for the affected system. Use a fuse puller or needle-nose pliers to carefully remove the fuse.
Inspect the fuse closely to see if the metal filament inside is broken or melted. A blown fuse will have a visible gap in the filament, indicating that it has overheated and failed. Replace the blown fuse with a new fuse of the same amperage rating. Do not use a fuse with a higher amperage rating, as this can overload the circuit and cause a fire. If the fuse blows again immediately after being replaced, there is likely a short circuit or other electrical problem that needs to be investigated further.
Obtaining the correct replacement parts is crucial for ensuring the proper repair and performance of your John Deere 4720. Your local John Deere dealership is the primary source for genuine John Deere parts. Dealerships have access to the John Deere parts catalog and can help you identify the correct part for your specific model and serial number. They can also provide advice on installation and troubleshooting.
Alternatively, you can explore online retailers that specialize in John Deere parts or aftermarket parts for tractors. When ordering parts online, be sure to verify the part number and compatibility with your tractor model before placing your order. Read reviews and check the seller's reputation before making a purchase. Keep in mind that while aftermarket parts may be less expensive, they may not always meet the same quality standards as genuine John Deere parts.
The John Deere 4720 compact utility tractor is a versatile machine capable of handling a wide variety of attachments and implements, making it a true workhorse for property maintenance, landscaping, and agricultural tasks. Understanding which attachments are compatible with your 4720 is crucial for ensuring safe and efficient operation. Before purchasing or using any attachment, always consult the John Deere parts catalog or your local dealer to confirm compatibility and any necessary modifications or additional components required for proper installation and functionality. Using an incompatible attachment can lead to equipment damage, operator injury, and voiding of your tractor's warranty. This chapter will delve into the most commonly used attachments and implements for the 4720, providing detailed instructions for their installation, operation, and maintenance.
Proper installation and removal of attachments and implements are essential for safety and preventing damage to your John Deere 4720. Always consult the specific operator's manual for the attachment you are installing or removing, as procedures can vary significantly between different implements. Before beginning any installation or removal procedure, ensure the tractor is parked on a level surface, the engine is shut off, and the parking brake is engaged. Disconnect the negative battery cable to prevent accidental starting during the process. Thoroughly clean the attachment and the tractor's mounting points to remove any dirt, debris, or corrosion that could interfere with proper connection.
When installing or removing implements connected via the three-point hitch, use appropriate lifting devices and safety stands to support the implement's weight. Never position yourself under a suspended implement without proper support. Carefully align the implement's mounting points with the tractor's hitch arms, and secure them using the correct size and type of pins and fasteners. Ensure all connections are tight and secure before operating the tractor. Similarly, when installing or removing implements connected via the quick-attach system, ensure the locking levers are fully engaged and the attachment is securely seated before proceeding. Regularly inspect all connection points for wear, damage, or loose fasteners and replace them as needed to maintain safe and reliable operation.
The John Deere 4720 can be equipped with a variety of mowing decks, allowing you to maintain lawns, pastures, and other grassy areas. Before operating the mowing deck, inspect the blades for sharpness, balance, and any signs of damage. Replace any damaged or worn blades immediately. Adjust the cutting height to the desired level using the deck's height adjustment mechanism, ensuring that all wheels are set to the same height. When mowing, maintain a consistent speed and avoid sudden turns or stops to prevent scalping or uneven cutting. Be particularly cautious when mowing on slopes or around obstacles to prevent accidents or damage to the deck. Regularly clean the mowing deck after use to remove grass clippings and debris, preventing buildup that can affect performance and lead to corrosion.
The front-end loader is one of the most versatile attachments for the John Deere 4720, allowing you to move materials, dig, and perform a variety of other tasks. Before operating the loader, inspect all hydraulic lines and connections for leaks or damage. Ensure the bucket is securely attached and all locking pins are properly engaged. When operating the loader, use smooth and controlled movements to prevent jerky operation and potential spills. Be mindful of the loader's lifting capacity and never exceed the maximum rated load. When lifting heavy loads, keep the load low to the ground to maintain stability and prevent tipping. When digging, use the loader's float function to allow the bucket to follow the contours of the ground. Always lower the loader to the ground and engage the parking brake before dismounting the tractor.
For those living in areas with heavy snowfall, the snowblower attachment can be a lifesaver. Before operating the snowblower, inspect the auger and impeller for any obstructions or damage. Ensure the shear bolts are in good condition and properly installed. Adjust the chute deflector to direct the snow to the desired location. When operating the snowblower, maintain a slow and steady speed to allow the auger to effectively gather and throw the snow. Avoid operating the snowblower on gravel or other loose surfaces to prevent damage to the auger or impeller. Be cautious of hidden obstacles such as rocks or ice patches that could damage the snowblower or cause the tractor to lose traction. After use, clean the snowblower to remove any snow or ice buildup, and lubricate the moving parts to prevent corrosion.
Proper preparation is crucial for ensuring your John Deere 4720 remains in optimal condition during periods of storage. Ignoring this step can lead to costly repairs down the line, especially concerning rust, corrosion, and component degradation. Thoroughly cleaning the tractor is the first step. Remove all dirt, mud, and debris from the exterior and interior, paying special attention to areas prone to moisture accumulation. A pressure washer with a mild detergent can be effective, but be mindful of sensitive electrical components.
Next, focus on the tractor's fluids. Drain and replace the engine oil, transmission fluid, and hydraulic fluid. Using fresh fluids ensures that any contaminants that could cause corrosion or damage during storage are removed. Consult your operator's manual for the correct fluid types and quantities for your 4720. It's also wise to add a fuel stabilizer to the fuel tank to prevent the fuel from breaking down and causing problems with the fuel system upon restarting. This is particularly important for longer storage periods, as old fuel can clog injectors and other fuel system components.
Finally, protect the tractor from the elements. If possible, store the tractor indoors in a dry, sheltered location. This will significantly reduce the risk of rust, corrosion, and UV damage to the paint and other components. If indoor storage is not an option, cover the tractor with a waterproof and breathable cover designed for outdoor use. This will help protect it from rain, snow, sun, and dust. Remember to inspect the cover periodically to ensure it remains secure and in good condition throughout the storage period.
Transporting your John Deere 4720 safely is paramount to prevent accidents and damage to the tractor and other vehicles. Before transporting the tractor, ensure that it is properly secured to the trailer using heavy-duty tie-down straps or chains. Refer to your trailer's specifications and the tractor's weight to determine the appropriate number and strength of tie-downs required. Distribute the tie-downs evenly across the tractor's frame to ensure a balanced and secure load. Always double-check the tie-downs before beginning transport.
When loading the tractor onto the trailer, use ramps that are rated for the weight of the tractor. Ensure that the ramps are securely attached to the trailer and that the angle of incline is not too steep. Drive slowly and carefully onto the trailer, using a spotter to guide you. Once the tractor is on the trailer, engage the parking brake and place the transmission in park or neutral. Secure any implements attached to the tractor, such as loaders or mowers, to prevent them from shifting during transport.
Before embarking on your journey, thoroughly inspect the trailer's lights and brakes to ensure they are functioning correctly. Adhere to all local and state regulations regarding vehicle size and weight restrictions. Drive cautiously and defensively, maintaining a safe following distance and avoiding sudden stops or turns. Regularly check the tie-downs during transport to ensure they remain tight and secure. Upon arrival at your destination, carefully unload the tractor using the same safety precautions as when loading it.
Proper battery maintenance is essential for ensuring that your John Deere 4720 starts reliably after a period of storage. Batteries can discharge over time, especially in cold weather, which can lead to starting problems. The best practice is to remove the battery from the tractor and store it in a cool, dry place. Clean the battery terminals with a wire brush to remove any corrosion. This ensures a good electrical connection when the battery is reinstalled.
Before storing the battery, fully charge it using a battery charger designed for lead-acid batteries. Overcharging can damage the battery, so be sure to follow the charger's instructions carefully. Periodically check the battery's voltage during storage. If the voltage drops below 12.4 volts, recharge the battery to prevent sulfation, which is the buildup of lead sulfate crystals on the battery plates. Sulfation reduces the battery's capacity and lifespan.
When reinstalling the battery in the tractor, ensure that the terminals are clean and that the connections are tight. Apply a thin coat of dielectric grease to the terminals to prevent corrosion. Start the tractor and let it run for a few minutes to ensure that the battery is charging properly. Regular battery maintenance will help extend the battery's lifespan and ensure that your John Deere 4720 starts reliably every time.
The John Deere 4720 tractor boasts a powerful and reliable engine, meticulously engineered to deliver optimal performance across a wide range of tasks. Specifically, the 4720 is equipped with a Yanmar 4TNV88 diesel engine, a four-cylinder, liquid-cooled powerhouse known for its efficiency and durability. This engine generates significant torque, allowing the tractor to handle demanding applications such as heavy mowing, tilling, and loader work with ease. The direct injection fuel system ensures efficient fuel combustion, contributing to lower operating costs and reduced emissions. Furthermore, the engine incorporates a robust air intake system to filter out dust and debris, protecting vital engine components and extending its lifespan. Understanding these specifications allows for informed maintenance decisions and troubleshooting.
The transmission system of the John Deere 4720 is designed for versatility and ease of use, allowing operators to tailor the tractor's performance to the specific task at hand. It is equipped with a hydrostatic transmission (HST), offering infinitely variable speed control within each of its two ranges. This feature is particularly beneficial for tasks requiring precise speed control, such as loader work or operating implements requiring a consistent pace. The HST system provides smooth and responsive acceleration and deceleration, minimizing operator fatigue and improving overall efficiency. Additionally, the transmission incorporates a two-range gearbox, offering both high and low speed ranges to match the terrain and application. These features, combined with the user-friendly controls, make the 4720 a highly adaptable and efficient machine.
The hydraulic system of the John Deere 4720 is a critical component responsible for powering a variety of implements and attachments, enhancing the tractor's versatility. The system operates with a dedicated hydraulic pump that provides ample flow and pressure to power implements such as loaders, backhoes, and mowers. Specifically, the system delivers a flow rate tailored to the needs of common implements, ensuring responsive and efficient operation. The 4720 features multiple hydraulic remotes, allowing operators to connect and control a variety of implements simultaneously. The hydraulic system also incorporates a safety relief valve to protect against over-pressurization, safeguarding the system from damage and ensuring operator safety. Regularly inspecting and maintaining the hydraulic system is essential for maintaining optimal performance and preventing costly repairs.
Maintaining proper fluid levels in your John Deere 4720 is crucial for optimal performance and longevity. The fuel tank has a capacity designed to allow for extended operation, reducing the need for frequent refills during long workdays. Specifically, consult the label on the tractor or the fluid capacity chart for the exact volume. The engine oil capacity is essential for proper lubrication and cooling, preventing engine wear and tear. Likewise, the transmission and hydraulic system each have specific fluid requirements that must be met to ensure smooth and reliable operation. Always use the recommended fluids specified by John Deere to avoid compatibility issues and ensure optimal performance. Regularly checking and replenishing fluids as needed is a fundamental aspect of preventative maintenance.
Understanding the dimensions and weight of your John Deere 4720 is important for transportation, storage, and ensuring compatibility with implements and attachments. The overall length and width of the tractor are crucial factors to consider when maneuvering in confined spaces or transporting the machine on a trailer. The height of the tractor, including the ROPS (Roll-Over Protective Structure), should be taken into account when operating in areas with low overhead clearance. The weight of the tractor is also a significant factor, as it affects traction and stability, particularly when operating on uneven terrain or with heavy implements. Consult the specifications chart for the exact dimensions and weight of your specific 4720 model, as variations may exist depending on optional equipment and configurations. Keeping these measurements in mind will promote safe and efficient operation.