John Deere S120 Manual: Your Comprehensive Guide

Understanding Your John Deere S120

Key Features and Components

The John Deere S120 is a robust and reliable lawn tractor designed for homeowners who demand performance and ease of use. Its key features include a powerful engine, typically a Briggs & Stratton or Kawasaki, known for its durability and consistent power output. This engine provides ample torque for tackling various lawn conditions, from flat terrain to gently sloping yards. Furthermore, the S120 boasts a comfortable operator station, featuring an adjustable seat and ergonomic controls, ensuring a pleasant mowing experience even during extended periods of use. The tractor's durable frame and heavy-duty axles contribute to its overall stability and longevity, making it a worthwhile investment for years to come.

Beyond the engine and operator station, the S120 incorporates several other essential components. The hydrostatic transmission allows for smooth and effortless speed control, eliminating the need for manual shifting and providing precise maneuverability. The mowing deck, usually ranging from 42 to 48 inches, is designed for efficient cutting and even distribution of clippings. Also important is the electrical system, which powers the starter motor, lights, and safety interlocks. Understanding these components is crucial for proper maintenance and troubleshooting.

Safety Precautions and Warnings

Operating any machinery, including the John Deere S120, requires strict adherence to safety precautions to prevent accidents and injuries. Before starting the tractor, thoroughly read and understand the operator's manual. Always wear appropriate personal protective equipment (PPE), including safety glasses, hearing protection, and sturdy footwear. Ensure that all guards and shields are in place and functioning correctly. Never operate the tractor under the influence of alcohol or drugs, as impaired judgment can lead to dangerous situations. It's also vital to regularly inspect the tractor for any signs of damage or wear, addressing any issues promptly to avoid potential hazards.

When operating the S120, be mindful of your surroundings and potential hazards. Clear the mowing area of any objects such as rocks, toys, or debris that could be thrown by the mower blades. Avoid mowing on steep slopes or near drop-offs, as this can increase the risk of tipping. Never allow children or unauthorized individuals to operate the tractor, and always supervise them when they are in the vicinity. If you are transporting the tractor on a trailer, properly secure it with tie-down straps to prevent it from shifting or falling during transport. Prioritizing safety will help ensure a safe and enjoyable mowing experience.

Model Identification and Specifications

Accurate model identification is essential for ordering replacement parts, accessing technical support, and understanding your tractor's specific features and capabilities. The model number, "S120," is usually prominently displayed on the tractor's hood or frame. The serial number, a unique identifier for your specific unit, can typically be found on a sticker or plate located on the frame, often near the engine or seat. Always record both the model number and serial number for future reference.

Understanding the specifications of your S120 is crucial for proper operation and maintenance. Key specifications include engine horsepower, cutting width, fuel tank capacity, tire sizes, and overall dimensions. This information can usually be found in the operator's manual or on the John Deere website. Knowing these specifications will allow you to make informed decisions about fuel type, tire pressure, and compatible attachments. Furthermore, referring to the specifications when troubleshooting problems can help narrow down the potential causes and facilitate effective repairs.

Operating Procedures

Pre-Operation Checklist

Before each use of your John Deere S120, it is crucial to conduct a thorough pre-operation checklist to ensure safe and efficient operation. This checklist is designed to identify potential problems before they escalate into major issues or safety hazards. Begin by visually inspecting the tractor for any signs of damage, such as cracked housings, loose parts, or fluid leaks. Check the tire pressure, ensuring it matches the recommended PSI listed in your owner's manual; improper tire pressure can affect the tractor's stability and cutting performance. Confirm that all safety shields and guards are properly in place and securely fastened, as these are critical for preventing injury during operation.

Further inspections should include checking the engine oil level using the dipstick, adding oil as needed to maintain the proper level. Examine the fuel level and replenish with fresh gasoline, using the recommended octane rating for optimal engine performance. Verify that the mower deck is clean and free of debris, such as grass clippings, twigs, and stones. Inspect the cutting blades for sharpness and any signs of damage; dull or damaged blades can tear the grass, resulting in an uneven cut and increased stress on the engine. Finally, ensure the operator presence system (OPS) is functioning correctly; this system prevents the engine from starting or shuts it off if the operator leaves the seat while the blades are engaged. Performing these checks before each use is a small investment of time that can save you from costly repairs and potential accidents.

Starting and Stopping the Engine

The John Deere S120 employs a straightforward starting procedure, but it's vital to follow the correct steps to avoid damaging the engine or encountering safety issues. First, ensure the parking brake is engaged to prevent unintended movement. Then, place the mower deck engagement lever in the disengaged position and move the transmission control lever to neutral. Turn the ignition key to the "ON" position and allow the fuel pump to prime for a few seconds. Once primed, turn the key to the "START" position and hold it until the engine starts. Release the key immediately after the engine starts to prevent damage to the starter motor.

When stopping the engine, it's equally important to follow the proper procedure. First, disengage the mower blades and move the transmission control lever to neutral. Allow the engine to idle for a minute or two to cool down, which helps prolong its lifespan. Turn the ignition key to the "OFF" position, and the engine should stop. Always set the parking brake to prevent the tractor from rolling. Finally, remove the key to prevent unauthorized use. If you are parking the tractor for an extended period, consider disconnecting the battery's negative terminal to prevent battery drain.

Mowing Techniques and Tips

Achieving a pristine lawn with your John Deere S120 requires more than just driving back and forth; proper mowing techniques are essential. Begin by overlapping each pass by a few inches to avoid leaving uncut strips of grass. Mow in straight lines, maintaining a consistent speed for an even cut. Avoid making sharp turns, which can scalp the lawn. If the grass is tall or thick, consider mowing in multiple passes, lowering the cutting height slightly with each pass. This will prevent the engine from bogging down and result in a cleaner cut.

Adjust your mowing schedule based on the season and the type of grass. During periods of rapid growth, you may need to mow more frequently. Avoid mowing when the grass is wet, as this can cause clumping and make it difficult to achieve a clean cut. Keep your mower blades sharp for optimal performance; dull blades tear the grass, making it more susceptible to disease and pests. Periodically clean the underside of the mower deck to remove accumulated grass clippings, which can affect the quality of the cut. By following these techniques, you can achieve a healthy and beautifully manicured lawn.

Adjusting Cutting Height

The John Deere S120 allows you to easily adjust the cutting height to suit your lawn's specific needs and preferences. Cutting height is crucial as it affects the health and appearance of your lawn. To adjust the cutting height, locate the cutting height adjustment lever, typically found near the operator's seat. Most models have a range of cutting heights, usually between 1.5 and 4 inches. Lift the lever and move it to the desired height setting, ensuring it locks securely into place. Always adjust the cutting height before starting the engine and engaging the mower blades.

Consider the type of grass you have when selecting the appropriate cutting height. Taller grass varieties generally benefit from a higher cutting height, while shorter varieties can be mowed lower. Avoid cutting more than one-third of the grass blade in a single mowing session, as this can stress the plant and make it more susceptible to disease. Adjust the cutting height seasonally; you may want to raise the cutting height during hot, dry periods to help conserve moisture and protect the grass from sun damage. Regularly check the cutting height settings to ensure they remain consistent over time.

Using the Attachments

The John Deere S120 is a versatile machine capable of more than just mowing; it can be equipped with various attachments to handle a wide range of tasks. Before using any attachment, carefully read the attachment's operator manual and familiarize yourself with its operation and safety precautions. Always ensure the engine is off and the parking brake is engaged before attaching or detaching any implements. Double-check that the attachment is securely fastened and properly aligned before starting the engine.

Common attachments for the S120 include baggers, mulch kits, and utility carts. Baggers collect grass clippings as you mow, providing a clean and tidy finish. Mulch kits chop the grass clippings into fine pieces and return them to the lawn as fertilizer. Utility carts can be used to haul materials around your property, such as mulch, soil, or firewood. When using any attachment, operate the tractor at a safe and controlled speed, and be aware of your surroundings. Regularly inspect the attachment for wear and tear, and perform any necessary maintenance as outlined in the operator's manual. With proper care and usage, attachments can greatly expand the functionality of your John Deere S120.

Maintenance and Service

Recommended Maintenance Schedule

Regular maintenance is crucial for the longevity and optimal performance of your John Deere S120 tractor. Adhering to a strict maintenance schedule ensures that all components are operating within their designed parameters, preventing premature wear and costly repairs down the line. This schedule should be viewed as a guideline, with adjustments made based on your individual usage patterns and environmental conditions. For instance, if you consistently mow in dusty conditions, you may need to clean or replace your air filter more frequently than the recommended interval. Careful record-keeping of your maintenance activities is also highly encouraged, allowing you to track trends and proactively address potential issues.

The recommended maintenance schedule typically includes tasks performed at regular intervals, such as every 8 hours, 25 hours, 50 hours, 100 hours, and annually. These intervals are designed to address the varying levels of wear and tear experienced by different tractor components. Shorter intervals often focus on visual inspections and fluid level checks, while longer intervals involve more in-depth servicing, such as oil changes, filter replacements, and lubrication of critical moving parts. Always consult your tractor's operator's manual for the specific maintenance schedule relevant to your S120 model year and engine type. Following the manufacturer's recommendations is the best way to ensure your tractor remains in peak operating condition.

Changing the Oil and Filter

Changing the oil and filter is perhaps the most critical maintenance task for your John Deere S120 engine. Fresh engine oil provides optimal lubrication, reduces friction, and helps to dissipate heat, all of which contribute to a longer engine lifespan. Over time, engine oil degrades, accumulates contaminants, and loses its lubricating properties, making it imperative to replace it regularly. Neglecting oil changes can lead to increased engine wear, reduced fuel efficiency, and potentially catastrophic engine failure. Always use the correct type and viscosity of oil as specified in your operator's manual to ensure proper engine performance and protection.

To change the oil and filter, begin by warming up the engine slightly. This allows the oil to flow more easily, ensuring a more complete drain. Position a suitable drain pan beneath the oil drain plug and carefully remove the plug using the appropriate wrench. Allow the oil to drain completely, which may take several minutes. While the oil is draining, remove the old oil filter using an oil filter wrench. Lightly lubricate the rubber gasket of the new oil filter with fresh oil and install it by hand, tightening it according to the instructions on the filter. Once the oil has completely drained, reinstall the drain plug with a new sealing washer if necessary, tightening it to the specified torque. Finally, refill the engine with the correct amount of fresh oil, checking the oil level using the dipstick. Start the engine and check for leaks around the drain plug and oil filter.

Replacing the Air Filter

The air filter is your engine's first line of defense against dirt, dust, and debris. A clean air filter ensures that only clean air enters the engine's combustion chamber, preventing premature wear and maintaining optimal engine performance. A clogged or dirty air filter restricts airflow, leading to reduced power, decreased fuel efficiency, and increased exhaust emissions. Regularly inspecting and replacing the air filter is a simple yet crucial maintenance task that can significantly extend your engine's lifespan. The frequency of air filter replacement depends on the operating environment; dusty conditions require more frequent changes.

To replace the air filter, locate the air filter housing on your engine. Open the housing and carefully remove the old air filter. Inspect the housing for any dirt or debris and clean it thoroughly before installing the new filter. Ensure that the new air filter is properly seated in the housing and that the housing is securely closed. Avoid using compressed air to clean a paper air filter, as this can damage the filter element. Instead, gently tap the filter to remove loose dirt. However, replacement is always recommended over cleaning for optimal engine protection.

Sharpening or Replacing Mower Blades

Sharp mower blades are essential for a clean, healthy cut. Dull blades tear the grass, resulting in brown tips and making the lawn more susceptible to disease. Sharpening or replacing your mower blades regularly not only improves the appearance of your lawn but also reduces stress on the engine and deck, extending their lifespan. Always disconnect the spark plug wire before working on the mower blades to prevent accidental starting. Wear heavy gloves to protect your hands from the sharp edges of the blades.

To sharpen mower blades, carefully remove them from the mower deck, noting their orientation for proper reinstallation. Use a file or grinder to sharpen the cutting edge, maintaining the original angle. Be careful not to overheat the blade during grinding, as this can weaken the metal. After sharpening, balance the blade using a blade balancer. An unbalanced blade can cause excessive vibration, damaging the mower deck and engine. If the blade is severely damaged or worn, it's best to replace it with a new one. Ensure that you torque the blade retaining bolts to the specified value during reinstallation.

Cleaning the Mower Deck

A clean mower deck is vital for efficient mowing and preventing rust and corrosion. Grass clippings and debris can accumulate under the deck, trapping moisture and creating an ideal environment for rust. Regularly cleaning the deck helps maintain its structural integrity and ensures proper airflow for optimal cutting performance. Always disconnect the spark plug wire before cleaning the mower deck to prevent accidental starting.

There are several ways to clean the mower deck. One method is to use a garden hose with a high-pressure nozzle to spray away the accumulated debris. A scraper can be used to remove stubborn clumps of grass. Another option is to tip the mower on its side (with the air filter and carburetor facing up) and use a brush or scraper to clean the underside of the deck. After cleaning, apply a coat of rust-preventative paint to any bare metal areas to protect them from corrosion.

Checking and Adjusting Tire Pressure

Proper tire pressure is critical for optimal performance, safety, and tire life. Underinflated tires can lead to reduced fuel efficiency, increased tire wear, and poor handling. Overinflated tires can result in a harsh ride and decreased traction. Regularly checking and adjusting tire pressure ensures that your John Deere S120 is operating at its best. Consult your operator's manual for the recommended tire pressure for your model.

Use a reliable tire pressure gauge to check the tire pressure. Add or release air as needed to reach the recommended pressure. Check the tire pressure when the tires are cold for an accurate reading. Inspect the tires for any signs of damage, such as cuts, bulges, or excessive wear. Replace damaged tires promptly to ensure safe operation.

Lubrication Points and Procedures

Proper lubrication is essential for reducing friction and wear on moving parts. Regularly lubricating key components, such as the steering linkage, wheel bearings, and mower deck spindles, helps ensure smooth operation and extends the life of these parts. Use a high-quality grease specifically designed for lawn and garden equipment. Consult your operator's manual for the location of all lubrication points and the recommended lubrication intervals.

Apply grease to the lubrication points using a grease gun. Wipe away any excess grease after lubrication. Inspect the lubrication points for any signs of damage or wear. Replace any worn or damaged parts promptly to prevent further damage. Avoid over-greasing, as this can attract dirt and debris. Follow the recommended lubrication intervals and procedures in your operator's manual for optimal results.

Troubleshooting

Engine Starting Problems

A non-starting engine can be one of the most frustrating issues to encounter with your John Deere S120. Before you start tearing into the engine, begin with the basics. Ensure the fuel tank has adequate fuel, and the fuel shut-off valve is in the "ON" position. Next, verify the battery is charged and the connections are clean and secure, both at the battery terminals and at the starter solenoid. A corroded or loose connection can prevent sufficient current from reaching the starter motor. Finally, check the spark plug for proper function; a fouled or worn spark plug can prevent the engine from firing.

If the basics check out, delve deeper into the ignition system. Use a spark plug tester to confirm that the spark plug is receiving a consistent spark. If there is no spark, inspect the ignition coil, wiring harness, and safety switches (seat switch, blade engagement switch). These safety switches are designed to prevent the engine from starting under certain conditions, such as when the operator is not seated or the blades are engaged. A faulty switch can mimic a more serious engine problem. If the engine cranks but doesn’t start, consider a fuel delivery issue; the carburetor might be clogged or malfunctioning, which will require cleaning or possibly replacement.

Mowing Issues

Uneven cutting or scalping of the lawn can indicate a problem with the mower deck. Begin by inspecting the mower blades for sharpness and damage. Dull or damaged blades will tear the grass instead of cutting it cleanly, resulting in an uneven cut. Sharpen or replace the blades as needed, ensuring they are balanced to prevent vibration. Next, check the deck leveling; the deck should be level from side to side and slightly lower in the front than in the back. Use a level and the adjustment points on the mower deck to achieve the proper leveling.

Furthermore, ensure the mower deck is free of debris. Accumulated grass clippings can obstruct the airflow and prevent the blades from cutting effectively. Regularly clean the underside of the deck to maintain optimal performance. Inspect the drive belt for wear and tension; a loose or worn belt can cause the blades to spin at a reduced speed, leading to uneven cutting. Replace the belt if it shows signs of cracking or fraying. Finally, verify the spindle bearings are in good condition; worn bearings can cause the blades to wobble or vibrate, resulting in a poor cut.

Transmission Problems

Transmission issues can manifest as a loss of drive power, difficulty shifting gears, or unusual noises. If the tractor lacks drive power, start by checking the drive belt that connects the engine to the transmission. A worn or broken belt will prevent power from being transmitted to the wheels. Inspect the belt for wear and tension and replace it if necessary. Next, verify the transmission fluid level; low fluid levels can cause slippage and loss of drive power. Consult the owner's manual for the correct fluid type and fill level.

If the tractor is difficult to shift gears, the shift linkage may be out of adjustment. Refer to the owner's manual for the proper adjustment procedure. Unusual noises from the transmission can indicate internal damage. In this case, it is best to consult a qualified technician for diagnosis and repair. Avoid operating the tractor with a damaged transmission, as this can lead to further damage and more costly repairs. It is also wise to regularly check for fluid leaks that could be caused by worn seals or gaskets.

Electrical Issues

Electrical problems can range from a dead battery to malfunctioning lights or gauges. If the battery is dead, first attempt to charge it using a battery charger. If the battery does not hold a charge, it may need to be replaced. Ensure the battery terminals and cable connections are clean and secure. Corrosion can prevent proper electrical flow. Check the fuses and circuit breakers for any blown or tripped components. Replace any blown fuses with the correct amperage rating.

If the lights are not working, check the bulbs and wiring connections. A loose or corroded connection can prevent the lights from functioning properly. Use a multimeter to test the voltage at the light sockets. If there is no voltage, trace the wiring back to the switch or fuse box to identify the source of the problem. If the gauges are not functioning correctly, check the sending units and wiring connections. A faulty sending unit can provide inaccurate readings. In more complex cases, consider professional assistance.

General Troubleshooting Tips

When troubleshooting any issue with your John Deere S120, always start with the simplest solutions first. Check the obvious things, such as fuel levels, fluid levels, and connections, before moving on to more complex components. Consult the owner's manual for specific troubleshooting information and diagrams. The manual provides valuable information about the tractor's operation and maintenance. Always disconnect the spark plug wire before working on the engine or mower deck to prevent accidental starting.

Keep a record of any repairs or maintenance performed on the tractor. This record will help you track any recurring issues and provide valuable information for future troubleshooting. When replacing parts, use genuine John Deere parts whenever possible. Genuine parts are designed to fit and function correctly in your tractor, ensuring optimal performance and longevity. Finally, don't hesitate to seek professional assistance from a qualified technician if you are unable to resolve the issue yourself. A trained technician has the expertise and tools to diagnose and repair complex problems.

Storage and Winterization

Preparing Your S120 for Storage

Proper preparation is key to ensuring your John Deere S120 starts reliably and operates smoothly after a period of storage, particularly during the winter months. Before you even think about covering the tractor, take the time to thoroughly clean it, removing any accumulated grass, dirt, or debris from the mower deck, engine compartment, and undercarriage. This not only prevents corrosion but also discourages pests from making your S120 their winter home. Inspect the tractor for any signs of damage or wear, addressing any necessary repairs before storage. A small fix now can prevent a major headache later. Remember to consult other chapters in this manual for detailed instructions on specific maintenance procedures mentioned here.

Next, stabilize the fuel in the tank to prevent it from breaking down and causing starting problems in the spring. Add a fuel stabilizer to the fuel tank according to the manufacturer's instructions, ensuring it thoroughly mixes with the fuel. Run the engine for a few minutes to allow the stabilized fuel to circulate through the entire fuel system, including the carburetor or fuel injectors. This step is crucial, especially with today's ethanol-blended fuels, which can degrade quickly and gum up the fuel system. Finally, change the engine oil and filter to remove contaminants that can corrode internal engine components during storage. Use the recommended oil type and filter specified in the "Maintenance" section of this manual, adhering strictly to the manufacturer's recommendations for optimal engine health.

Storing the Battery

The battery is a critical component that requires special attention during storage to prevent damage and ensure it's ready to go when you need it. Start by disconnecting the battery cables, removing the negative cable first to prevent accidental shorts. Clean the battery terminals with a wire brush to remove any corrosion buildup, ensuring a good connection when you reconnect it in the spring. Inspect the battery case for any cracks or leaks, and replace the battery if necessary to avoid potential problems during storage and future use. A leaking battery can cause corrosion and damage to surrounding components.

Ideally, store the battery in a cool, dry place where it won't be subjected to extreme temperatures. Heat and cold can both shorten the lifespan of a battery. Connect the battery to a battery tender or maintainer, which will keep it charged at the optimal level throughout the storage period. This prevents sulfation, a condition where lead sulfate crystals form on the battery plates, reducing its capacity and lifespan. If you don't have a battery tender, check the battery voltage periodically and charge it as needed to keep it above 12.4 volts. Proper battery storage is essential for maximizing its lifespan and ensuring reliable starting performance when you're ready to use your S120 again.

Protecting Your Tractor from the Elements

Protecting your John Deere S120 from the elements is paramount to preserving its condition and preventing rust and deterioration. Ideally, store your tractor in a shed, garage, or other covered location. This shields it from rain, snow, sun, and wind, all of which can contribute to corrosion and damage to the paint, plastic, and rubber components. If you don't have access to covered storage, invest in a high-quality tractor cover specifically designed to protect against the elements. Make sure the cover is breathable to prevent moisture buildup underneath, which can actually promote rust. Secure the cover tightly to prevent it from blowing off in windy conditions.

Before covering your tractor, inspect the tires and ensure they are properly inflated to the recommended pressure. This will help prevent flat spots from forming during storage. Consider placing the tractor on blocks to take the weight off the tires entirely, further protecting them. Finally, apply a coat of wax to the painted surfaces to provide an additional layer of protection against corrosion and UV damage. This will help keep your S120 looking its best for years to come. Remember, a little preventative maintenance goes a long way in preserving the value and performance of your John Deere S120.

Parts and Accessories

Identifying Replacement Parts

Maintaining your John Deere S120 lawn tractor requires access to the right replacement parts. Correctly identifying these parts is crucial for ensuring proper functionality and longevity of your machine. The first step is always to consult your tractor's operator's manual. This manual contains detailed diagrams and part lists, which are invaluable for locating the specific component you need. Pay close attention to the part number associated with each item, as this unique identifier will help you avoid ordering the wrong part. In addition to the manual, many parts themselves are labeled with a part number, often stamped or engraved on the surface. Check the part carefully before you remove it from the tractor to note the number. If the number is illegible, take several clear photos from different angles to use as a visual reference.

Another useful resource for identifying replacement parts is the John Deere online parts catalog. This online resource allows you to search for parts based on your tractor model, serial number, and a variety of other criteria. Once you've identified the correct part, you can view detailed diagrams and specifications. You can also compare the online diagram with the physical part that you removed from the machine. Additionally, consider consulting with a John Deere dealer. They have experienced parts specialists who can assist you in identifying the correct part, even if the original part number is unknown or obsolete. Remember to provide them with as much information as possible about your tractor, including its model, year, and any modifications you've made. Be aware that some modifications might require adjustments to part selection.

Ordering Parts Online or from Your Dealer

Once you have correctly identified the part number, you have several options for ordering replacement parts for your John Deere S120. A popular and convenient method is to order parts online through the John Deere website or authorized online retailers. When ordering online, double-check the part number against your original identification to avoid mistakes. Ensure the online retailer is reputable and offers a warranty on the parts they sell. Compare prices from different vendors to ensure you are getting a competitive deal. Remember to factor in shipping costs when comparing total prices. Keep records of your orders, including order numbers, tracking information, and invoices for your records.

Alternatively, you can order parts directly from your local John Deere dealer. Ordering through a dealer offers the advantage of personalized service and expert advice. Your dealer can help you verify that you're ordering the correct part and offer installation tips or assistance. They can also advise you on related parts that may need replacing at the same time, such as seals, gaskets, or fasteners. Additionally, some dealers may offer expedited shipping options, allowing you to get your tractor back up and running more quickly. When ordering from a dealer, it is always a good idea to call ahead to confirm that the part is in stock or to check the estimated delivery time. Building a relationship with your local John Deere dealer can prove invaluable for ongoing maintenance and support of your S120 tractor.

Available Attachments and Accessories

The John Deere S120 is a versatile machine that can be enhanced with a variety of attachments and accessories to increase its functionality beyond basic mowing. These attachments can improve the tractor's performance and adapt it to different landscaping tasks. One of the most common attachments is a bagging system. Bagging systems collect grass clippings as you mow, leaving your lawn with a clean, manicured appearance. They are particularly useful in areas where mulching is not desirable, such as when dealing with thick or wet grass. Consider the capacity of the bagging system and whether it is easy to empty when making your purchase.

Another valuable accessory is a mulching kit. A mulching kit recycles grass clippings back into the lawn as a natural fertilizer. This process can improve the health and appearance of your lawn over time by returning nutrients to the soil. Mulching kits typically include special blades and a deck plug that redirect the airflow within the mower deck. A lawn roller is another useful attachment, which smooths out uneven surfaces and compacts the soil after seeding or aerating. They can also be used to press down newly laid sod. Other available accessories include a snow blade for clearing light snow, a utility cart for hauling materials, and a variety of hitch attachments for towing small trailers or spreaders. When choosing attachments and accessories, always verify that they are compatible with your specific John Deere S120 model. Consulting your owner's manual or speaking with your dealer can help you make the right selections. Remember to install and use all attachments according to the manufacturer's instructions to ensure safe and effective operation. Using the incorrect attachment can damage the tractor or void the warranty.