John Deere LT133 Service and Repair Guide

General Information and Safety

About This Manual

This service and repair manual is designed to provide comprehensive information for maintaining and repairing your John Deere LT133 lawn tractor. It is intended for individuals with a basic understanding of mechanical principles and access to common tools. This manual covers a wide range of topics, from routine maintenance tasks to more complex repairs. By following the procedures outlined in this guide, you can keep your LT133 operating smoothly and efficiently for years to come. Please read this manual thoroughly before attempting any service or repair work.

The information contained within is based on the best available data at the time of publication and is subject to change without notice. Always verify part numbers and specifications with your local John Deere dealer before ordering components. While every effort has been made to ensure accuracy, the publisher and authors assume no responsibility for errors or omissions. Furthermore, this manual cannot replace professional mechanical training or experience. When in doubt, consult a qualified technician for assistance.

Safety Precautions

Safety is paramount when working on any mechanical equipment. Before commencing any maintenance or repair procedure, thoroughly understand the risks involved and take appropriate precautions. Always disconnect the spark plug wire and ground it to the engine block to prevent accidental starting. This is an essential step to prevent serious injury from occurring during repairs. Remember, the engine could start if not properly grounded.

Wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and hearing protection, as needed. Never work on a machine while it is running or with hot engine components. Allow the engine and exhaust system to cool completely before attempting any repairs. Use jack stands when lifting the tractor to provide a stable and secure working environment. Never rely solely on a jack for support. Be mindful of potential hazards such as sharp edges, moving parts, and flammable liquids.

When working with fuels and solvents, ensure adequate ventilation and avoid open flames or sparks. Dispose of used fluids and filters properly in accordance with local regulations. Remember, improper disposal can harm the environment. Never use gasoline or other flammable liquids for cleaning parts. Use a designated parts cleaner. Always ensure you are working in a clean, well-lit area to reduce the risk of accidents and make the task easier.

Torque Specifications

Proper torque is critical for the correct assembly and function of many components on your John Deere LT133. Over-tightening fasteners can damage threads or components, while under-tightening can lead to loosening, leaks, or even failure. Refer to the torque specifications listed in this manual or in the applicable parts catalog for the specific fastener being tightened. Always use a calibrated torque wrench to ensure accurate torque values. Make sure your wrench is in good working condition and that you know how to read and use it.

When tightening fasteners, follow the recommended tightening sequence, if specified. This helps to distribute the load evenly and prevent distortion. For example, when tightening cylinder head bolts, use a crisscross pattern to gradually increase the torque. Lubricate threads with the appropriate lubricant (e.g., engine oil, anti-seize compound) as specified. This helps to achieve accurate torque readings and prevent galling or seizing of the threads. If a specific torque value is not listed, use a general torque chart based on fastener size and material. Remember, following the correct procedures is essential for ensuring that the repairs are done correctly.

Tools and Equipment

Having the right tools and equipment is essential for performing service and repairs on your John Deere LT133 safely and efficiently. A well-equipped workshop will save you time and frustration. At a minimum, you will need a set of metric sockets and wrenches, screwdrivers (Phillips and flathead), pliers, a torque wrench, and a multimeter. Consider investing in specialized tools such as a compression tester, timing light, and bearing puller for more complex repairs.

In addition to hand tools, you will also need some basic equipment such as a jack, jack stands, an oil drain pan, and a parts cleaning solvent. A service manual and a parts catalog are invaluable resources for identifying parts and procedures. A good quality battery charger/maintainer will also help to keep your battery in top condition, especially during periods of storage. Always keep your tools clean and organized to prevent loss or damage.

Consider investing in diagnostic tools such as a code reader or scan tool if you plan to perform more advanced repairs. These tools can help you identify problems quickly and accurately. Furthermore, always wear safety glasses and gloves when working on your tractor. Remember that working in a well-lit and ventilated area is crucial for safety and accuracy.

Troubleshooting Common Problems

Engine Problems (Starting, Stalling, Misfiring)

One of the most frustrating issues with any lawn tractor is engine trouble. If your John Deere LT133 is refusing to start, begin by checking the basics. Ensure the fuel tank has sufficient gasoline, and that the fuel is fresh (gasoline can degrade over time, especially if left sitting for extended periods). Examine the spark plug; a fouled or damaged spark plug can prevent the engine from firing. Check the air filter; a dirty air filter restricts airflow and starves the engine of oxygen, leading to starting problems or poor performance. The fuel lines and fuel filter should also be inspected for clogs or damage that could impede fuel delivery to the carburetor. Finally, verify that the battery is adequately charged and that the connections to the battery terminals are clean and secure.

Stalling or misfiring can indicate a number of different issues. A common cause is a dirty carburetor, which can restrict fuel flow and cause the engine to sputter or die. Consider using a carburetor cleaner, or if the problem persists, consider removing and thoroughly cleaning the carburetor following the instructions in the carburetor section of this manual. A loose or corroded spark plug wire can also cause intermittent misfires. Check the condition of the fuel pump; a failing fuel pump may not deliver adequate fuel pressure, leading to stalling, especially under load. Check the fuel cap to make sure it is venting correctly as a vacuum in the fuel tank will prevent the fuel pump from pumping. Lastly, consider checking the valve clearances, as improper valve clearances can cause engine performance issues, although this is a less common cause of stalling or misfiring on the LT133.

Transmission Issues (Loss of Drive, Slipping)

The transmission is critical for transferring power to the wheels. If you experience a loss of drive, the first thing to check is the drive belt. Inspect the belt for wear, cracks, or breaks. A worn or damaged belt can slip or break entirely, preventing the tractor from moving. Ensure the belt is properly tensioned; a loose belt will slip and fail to provide adequate power to the wheels. Also, verify that the transmission engagement lever is fully engaged. An improperly engaged lever can cause intermittent loss of drive.

Slipping in the transmission, characterized by the tractor struggling to maintain speed, particularly when going uphill or under load, often indicates internal wear within the transmission. Check the transmission fluid level; low fluid levels can lead to slippage and damage. If the fluid is low, add the recommended type of transmission fluid. Also, inspect the fluid for contamination (e.g., metal shavings). Contaminated fluid suggests internal wear, and the transmission may require more extensive repairs or replacement. Internal clutch packs or gears could be worn and no longer providing adequate grip. If these checks don't resolve the issue, consult a qualified transmission technician. Consider that the John Deere LT133 is a rear-wheel drive mower so going up steep hills will impact performance.

Cutting Deck Problems (Uneven Cut, Vibration)

An uneven cut is a common complaint among lawn tractor owners. The primary culprits are usually the mower blades themselves. Inspect the blades for sharpness, damage, or imbalance. Dull or damaged blades will tear the grass instead of cutting it cleanly, resulting in an uneven appearance. Sharpen the blades using a blade grinder or file, and replace them if they are significantly damaged or bent. Ensure the blades are properly balanced; an unbalanced blade will cause vibration and an uneven cut. Blade alignment is also key to ensuring a clean, even cut of the grass.

Excessive vibration in the cutting deck can be a sign of several potential problems. Check the spindle bearings; worn or damaged spindle bearings will cause vibration and noise. Replace the bearings if necessary. Inspect the mower deck for debris buildup. Grass clippings and other debris can accumulate under the deck, throwing it out of balance and causing vibration. Clean the deck thoroughly. Verify that the mower blades are securely attached and properly aligned. Loose or misaligned blades will vibrate excessively. Finally, inspect the mower deck pulleys and idler pulleys. Damaged or worn pulleys can also cause vibration.

Electrical System Troubleshooting (Battery, Starter, Lights)

Electrical problems can manifest in various ways, from a dead battery to faulty lights. If your John Deere LT133 won't start, begin by checking the battery voltage. A fully charged 12-volt battery should read approximately 12.6 volts. If the voltage is significantly lower, the battery may be discharged or damaged. Test the charging system to ensure the battery is being properly charged while the engine is running. A faulty alternator or voltage regulator can prevent the battery from charging. Clean and tighten the battery terminals; corroded or loose terminals can impede electrical flow.

If the starter motor is failing to engage or is making a grinding noise, the starter solenoid may be faulty. Test the solenoid using a multimeter to ensure it is properly sending power to the starter motor. A defective starter motor itself can also cause these symptoms. If the lights are dim or not working, check the bulbs and fuses. Replace any blown bulbs or fuses. Inspect the wiring harness for damage or loose connections. Corroded or damaged wires can cause electrical shorts and prevent the lights from functioning correctly. Lastly, ensure that the safety switches (seat switch, blade engagement switch) are functioning properly. A faulty safety switch can prevent the engine from starting or cause it to shut off unexpectedly.

Engine Maintenance and Repair

The John Deere LT133 lawn tractor is powered by a reliable single-cylinder engine, but like all engines, regular maintenance is crucial for optimal performance and longevity. Understanding the engine's specifications, such as horsepower, displacement, and compression ratio, is the foundation for proper maintenance. Consult your owner's manual for the exact specifications for your model year; these figures will be essential when troubleshooting issues or performing repairs. Knowing the engine type will also influence your choice of replacement parts and service procedures. Neglecting these fundamental aspects can result in misdiagnosis, improper repairs, and ultimately, damage to your engine.

Engine Specifications

Before undertaking any engine maintenance or repair, it's essential to have access to the engine specifications. These specifications will often include the engine model number, displacement in cubic inches (or liters), horsepower rating, and compression ratio. Also important are valve clearances (intake and exhaust), spark plug gap, and the proper octane rating of fuel to use. This information is typically found in the operator's manual or a dedicated engine service manual. Utilizing the correct specifications ensures you are performing maintenance and repairs to the factory recommended standards, which maximizes the engine's lifespan and efficiency.

Oil Change Procedures

Regular oil changes are paramount to keeping your John Deere LT133 engine running smoothly. The oil lubricates the engine's internal components, reducing friction and preventing wear. Over time, oil breaks down and becomes contaminated with dirt and debris, diminishing its lubricating properties. To perform an oil change, you'll need the correct type and quantity of oil (refer to your owner's manual), an oil filter wrench, a new oil filter, a drain pan, and a wrench to remove the drain plug. Always ensure the engine is slightly warm, but not hot, to facilitate better oil drainage. Remember to properly dispose of the old oil at a recycling center.

The process begins with locating the oil drain plug on the engine. Position the drain pan beneath the plug, carefully remove the plug, and allow the oil to drain completely. While the oil is draining, use the oil filter wrench to remove the old oil filter. Lightly lubricate the rubber gasket on the new oil filter with fresh oil, then screw the new filter onto the engine by hand until snug. Replace the drain plug with a new crush washer if available and tighten to the manufacturer's specified torque. Finally, pour the correct amount of fresh oil into the engine, check the oil level with the dipstick, and add more oil as needed to reach the full mark. Start the engine and check for leaks around the drain plug and oil filter.

Air Filter Cleaning and Replacement

The air filter prevents dirt and debris from entering the engine, which can cause significant damage. A dirty air filter restricts airflow, leading to reduced engine performance and fuel efficiency. Therefore, cleaning or replacing the air filter regularly is critical. Most LT133 engines have a two-stage air filter, consisting of a pre-cleaner foam filter and a paper filter. The pre-cleaner filter should be cleaned more frequently than the paper filter.

To clean the pre-cleaner filter, remove it from the housing and wash it with warm, soapy water. Rinse it thoroughly and allow it to air dry completely before re-installing it. For the paper filter, you can gently tap it on a hard surface to dislodge loose dirt and debris. Avoid using compressed air, as this can damage the filter element. If the paper filter is heavily soiled or damaged, it should be replaced. When re-installing the air filter, ensure that it is properly seated in the housing to prevent air leaks. This is especially important as any dirt or debris being sucked into the engine due to a poor seal can result in engine damage and significant repair costs.

Spark Plug Inspection and Replacement

The spark plug ignites the air-fuel mixture in the engine's combustion chamber. Over time, spark plugs can become fouled with carbon deposits, worn, or damaged, leading to misfires and reduced engine performance. Regularly inspecting and replacing the spark plug is an essential part of engine maintenance. To inspect the spark plug, carefully remove it from the engine using a spark plug socket. Check the electrode for wear, damage, and carbon buildup. The insulator should be free of cracks and chips.

If the spark plug is heavily fouled or damaged, it should be replaced. When installing a new spark plug, ensure that it is the correct type for your engine (refer to your owner's manual). Set the spark plug gap to the manufacturer's specified setting using a spark plug gapping tool. Tighten the spark plug to the specified torque using a torque wrench. Over-tightening can damage the cylinder head, while under-tightening can cause leaks. Proper spark plug maintenance ensures efficient combustion and optimal engine performance.

Carburetor Adjustment and Cleaning

The carburetor mixes air and fuel in the correct proportions to create a combustible mixture. Over time, the carburetor can become clogged with dirt and debris, or the adjustments can drift out of specification, leading to poor engine performance. Cleaning and adjusting the carburetor can restore engine performance and fuel efficiency. Before attempting to clean or adjust the carburetor, make sure you have the service manual for your specific engine, as settings can vary.

Carburetor cleaning often involves disassembling the carburetor and cleaning the individual components with carburetor cleaner. Pay particular attention to the jets and passages, as these are prone to clogging. After cleaning, reassemble the carburetor and adjust the idle mixture and idle speed screws according to the manufacturer's specifications. Carburetor adjustment is best done with the engine warmed up to operating temperature. If you are not comfortable performing carburetor cleaning and adjustment, it is best to consult a qualified technician. Improper carburetor adjustment can cause engine damage.

Fuel System Maintenance

Maintaining the fuel system is critical for reliable engine operation. The fuel system includes the fuel tank, fuel lines, fuel filter, and fuel pump. Problems with any of these components can lead to fuel starvation, poor engine performance, and even engine damage. Regularly inspecting the fuel lines for cracks and leaks is essential. Replace any damaged fuel lines immediately.

The fuel filter should be replaced annually or more frequently if the fuel is contaminated. A clogged fuel filter restricts fuel flow to the engine. The fuel tank should be drained and cleaned periodically to remove any sediment or water that may have accumulated. Using fuel stabilizer can help prevent fuel degradation, especially during periods of storage. Proper fuel system maintenance will ensure a reliable supply of clean fuel to the engine, resulting in optimal performance and longevity.

Transmission and Drive System

Belt Replacement (Drive and Deck)

Replacing worn or damaged belts on your John Deere LT133 is crucial for maintaining optimal performance of both the drive system and the mower deck. Inspect your belts regularly for signs of wear such as cracks, fraying, or glazing. These are indicators that the belt is nearing the end of its service life and needs replacement. Failure to replace a worn belt can result in slippage, reduced power transfer, and eventual belt failure, potentially causing damage to other components. Using genuine John Deere replacement belts is highly recommended, as they are specifically designed to meet the precise dimensions and material specifications required for your LT133, ensuring proper fit and longevity.

Before beginning any belt replacement, ensure the engine is off and the key is removed. Disconnect the spark plug wire to prevent accidental starting. For the drive belt, carefully remove any belt guards or covers that are in place. Note the routing of the old belt before removing it. The drive belt typically loops around the engine pulley, idler pulley, and transmission pulley. Install the new belt following the same routing, ensuring it is seated properly in the grooves of each pulley. For the mower deck belt, you may need to lower the deck to its lowest position and remove the mower deck from the tractor. Again, note the belt routing before removing the old belt. Be sure to properly re-install any belt guides or retaining clips after the new belt is in place.

After installing the new belt, double-check the tension to ensure it is within the manufacturer's specifications. Too much tension can lead to premature wear, while insufficient tension can cause slippage. Most belts will have a recommended deflection amount when pressed on. Consult your owner's manual or a service manual for specific tensioning procedures. Once you are satisfied with the belt tension, reinstall any belt guards or covers. Reconnect the spark plug wire and start the engine. Engage the drive and deck systems to verify that the belts are operating smoothly and without slippage. Observe the belts for any unusual noises or vibrations, and adjust the tension as needed.

Gearbox Inspection and Lubrication

The gearbox is a critical component of the John Deere LT133's transmission, responsible for transferring power from the engine to the wheels. Regular inspection and lubrication of the gearbox are essential for its longevity and reliable operation. Neglecting these maintenance tasks can lead to premature wear, overheating, and eventual failure of the gearbox. A properly maintained gearbox ensures smooth gear changes, optimal power transfer, and extended service life of the transmission system. It is recommended to perform gearbox inspections and lubrication at least annually, or more frequently if the tractor is used in demanding conditions.

Before inspecting the gearbox, allow the tractor to cool down completely. Locate the gearbox housing, which is typically situated near the rear axle. Clean any dirt or debris from around the fill plug and drain plug. Remove the fill plug and inspect the oil level. The oil level should be at or near the fill plug opening. If the oil level is low, add the appropriate type and amount of gear oil as specified in your owner's manual. Check the condition of the oil; it should be clean and free of contaminants. If the oil appears dark, milky, or contains metal shavings, it is an indication that the gearbox needs to be drained and refilled with fresh oil.

To drain the gearbox, place a suitable container beneath the drain plug. Remove the drain plug and allow the old oil to drain completely. Once the oil has drained, reinstall the drain plug and tighten it to the specified torque. Fill the gearbox with the recommended type and amount of gear oil, using a funnel to prevent spills. Reinstall the fill plug and tighten it securely. After refilling the gearbox, operate the tractor for a short period and then recheck the oil level. Adjust the oil level as needed to ensure it is within the proper range. Dispose of the used oil responsibly, following all local regulations.

Drive System Adjustments

Proper adjustment of the John Deere LT133's drive system is essential for optimal performance and operator control. The drive system encompasses various components, including the forward/reverse pedals, linkage, and transmission controls. Over time, these components can become misaligned or loose, resulting in sluggish response, erratic movement, or difficulty engaging gears. Regular adjustments help to maintain smooth and precise control, improve traction, and prevent premature wear of the transmission system. It is important to consult your owner's manual or a service manual for specific adjustment procedures, as these may vary depending on the model year and configuration of your LT133.

Begin by inspecting the linkage between the forward/reverse pedals and the transmission control levers. Look for any signs of wear, looseness, or damage to the linkage rods, joints, and bushings. If any components are worn or damaged, they should be replaced immediately. Check the pedal travel and ensure that the pedals move freely and smoothly. Adjust the pedal travel as needed to ensure proper engagement of the forward and reverse gears. Some models may have adjustable stops or linkage points that can be used to fine-tune the pedal travel. Make sure that both the forward and reverse pedals return to the neutral position when released.

Next, inspect the transmission control levers for proper alignment and movement. Ensure that the levers move freely and engage the gears smoothly. Adjust the lever positions as needed to ensure proper gear engagement. Check the tension of the springs or dampeners that control the lever movement. If the tension is too loose, the levers may not return to the neutral position properly. If the tension is too tight, the levers may be difficult to move. Fine-tune the tension as needed to achieve smooth and responsive lever operation. After making any adjustments, test the tractor in a safe and controlled environment to verify that the drive system is functioning properly. Check for any unusual noises, vibrations, or slippage. Readjust the drive system as needed to achieve optimal performance and control.

Cutting Deck Service

Blade Sharpening and Balancing

Maintaining sharp and balanced blades is crucial for achieving a clean and even cut with your John Deere LT133's mowing deck. Dull blades tear the grass instead of cutting it cleanly, leading to a ragged appearance, increased fuel consumption, and potential disease susceptibility in your lawn. Furthermore, unbalanced blades can cause excessive vibration, placing unnecessary stress on the spindle bearings, belts, and other deck components, potentially leading to premature failure. Regular sharpening and balancing of the blades are therefore essential preventative maintenance procedures.

Before beginning any work on the cutting blades, always disconnect the spark plug wire to prevent accidental engine starting. Then, carefully remove the blades from the spindle using the appropriate wrench, taking note of the orientation of the blades and any associated hardware like washers or spacers. Closely examine the blades for any signs of damage, such as cracks, bends, or excessive wear. Blades with significant damage should be replaced rather than sharpened. After sharpening, it is imperative that all blades are precisely balanced, preventing imbalance and vibration.

To sharpen the blades, use a bench grinder or file, maintaining the original blade angle. Ensure you grind evenly on both sides of the blade to preserve the balance. Once sharpened, use a blade balancer to check for any imbalance. If the blade is unbalanced, carefully grind a small amount of material from the heavier side until it balances perfectly. Reinstall the sharpened and balanced blades, ensuring they are properly secured with the correct torque specifications.

Deck Belt Replacement

The deck belt is a critical component responsible for transferring power from the engine to the cutting blades. Over time, the belt can wear, stretch, crack, or even break, leading to reduced cutting performance or complete deck failure. Regularly inspecting the deck belt for signs of wear is essential for preventing unexpected downtime. Look for cracks, fraying, glazing, or any other visible damage. If the belt shows any of these signs, or if it's simply old and worn, it's time for a replacement.

Replacing the deck belt on the John Deere LT133 requires careful attention to the belt routing around the pulleys. Before removing the old belt, it is highly recommended to make a drawing or take a picture of the belt's path. Release the belt tension by disengaging the deck and relaxing the idler pulley arm. Carefully remove the old belt, noting any obstructions that may need to be cleared. When installing the new belt, ensure it's properly seated in all the pulley grooves, following the original routing.

After installing the new belt, double-check the routing and tension. The belt should be snug but not overly tight. Excessive tension can lead to premature wear and damage to the belt and pulleys. Engage the deck and observe the belt's performance. If the belt slips, vibrates excessively, or makes unusual noises, recheck the routing and tension. Make any necessary adjustments to ensure smooth and efficient operation.

Spindle Bearing Replacement

The spindle bearings are responsible for allowing the cutting blades to rotate freely and smoothly. These bearings are subjected to significant stress and wear, especially in demanding mowing conditions. Worn or damaged spindle bearings can cause excessive vibration, noise, and ultimately, failure of the cutting deck. Recognizing the symptoms of failing spindle bearings and replacing them promptly is crucial for maintaining the performance and longevity of your John Deere LT133.

Common signs of worn spindle bearings include excessive noise (such as squealing, grinding, or rumbling) emanating from the deck, noticeable vibration while mowing, and visible play or looseness in the spindle assembly. To confirm a suspected bearing failure, carefully inspect the spindle for play by attempting to wiggle the blade from side to side. If you feel any significant movement, the bearings likely need replacement.

Replacing the spindle bearings typically involves removing the deck from the tractor, disassembling the spindle housing, pressing out the old bearings, and pressing in the new ones. Special tools, such as a bearing press, may be required for this procedure. Ensure you use the correct type and size of bearings for your John Deere LT133. After installing the new bearings, reassemble the spindle housing and reinstall the deck onto the tractor, ensuring all bolts are tightened to the correct torque specifications.

Deck Leveling Procedures

A properly leveled mowing deck is essential for achieving a uniform and even cut across your lawn. An uneven deck can result in scalping in certain areas and uncut grass in others, leading to an unsightly and unprofessional appearance. Regular deck leveling is an important maintenance task that ensures optimal cutting performance. The John Deere LT133 features adjustable components that allow for precise deck leveling.

Before beginning the leveling process, ensure the tires are properly inflated to the correct pressure, as this can significantly affect the deck's height. Park the tractor on a level surface, such as a concrete driveway or garage floor. Using a measuring tape or gauge, measure the distance from the bottom edge of the deck to the ground at various points around the perimeter. Note any discrepancies in height.

The John Deere LT133 typically has adjustable lift links or turnbuckles that allow you to raise or lower specific sections of the deck. Consult your owner's manual for the exact location and adjustment procedures for these components. Carefully adjust the lift links or turnbuckles until the deck is level at all points. After making adjustments, re-measure the deck height to confirm the changes. Repeat the adjustment process as needed until the deck is perfectly level. Once leveled, perform a test mowing pass on a small area of your lawn to verify the results and make any final adjustments.

Electrical System

Steering and Suspension

Steering Linkage Adjustment

Proper steering linkage adjustment is critical for safe and efficient operation of your John Deere LT133. Misaligned or worn linkage components can lead to wandering, excessive tire wear, and reduced control, especially at higher speeds. Regular inspection and adjustment of the steering linkage will help maintain optimal handling and extend the life of your tires and steering components. This process involves checking the tie rod ends, drag link, and steering sector for play and making the necessary adjustments to ensure proper alignment and minimal free play in the system. Always refer to the specific torque specifications in this guide for tightening fasteners after adjustment to prevent loosening or damage.

Begin by visually inspecting all steering linkage components for signs of wear, damage, or looseness. Pay close attention to the tie rod ends, looking for excessive play or binding. Next, with the engine off and the key removed, have someone gently rock the steering wheel back and forth while you observe the movement of the steering linkage components. Any significant play in the tie rod ends, drag link, or steering sector indicates a need for adjustment or replacement. The goal is to minimize free play without causing binding or stiffness in the steering system. Always use appropriate tools, such as wrenches and sockets, when making adjustments to avoid damaging the components.

To adjust the tie rod ends, loosen the jam nuts on either side of the tie rod end. Rotate the tie rod end in or out to adjust the toe-in of the front wheels. Toe-in refers to the distance between the front edges of the tires compared to the distance between the rear edges. Refer to the specifications in this guide for the correct toe-in measurement for your LT133. Once the toe-in is properly adjusted, tighten the jam nuts securely, ensuring that the tie rod end remains in the correct position. After making any adjustments to the steering linkage, it is crucial to perform a test drive in a safe area to verify the steering response and stability. Re-inspect the linkage after the test drive to ensure all fasteners remain tight and the adjustments have held their position.

Wheel Bearing Service

Properly maintained wheel bearings are essential for smooth rolling, reduced friction, and extended tire life on your John Deere LT133. Wheel bearings that are improperly lubricated, worn, or damaged can cause excessive heat buildup, leading to premature bearing failure and potential damage to the wheel hub and spindle. Regular inspection and lubrication of the wheel bearings will help prevent these issues and ensure optimal performance. Neglecting wheel bearing service can also increase rolling resistance, requiring more engine power to move the tractor, ultimately impacting fuel efficiency and overall performance.

To inspect the wheel bearings, first raise the front of the tractor using a jack and secure it with jack stands. Rotate each wheel by hand, listening for any unusual noises such as grinding, clicking, or squealing. Also, check for excessive play or wobble in the wheel. If you detect any of these signs, it's time to remove the wheel and inspect the bearings more closely. Remove the wheel and carefully examine the bearing for signs of damage, such as pitting, corrosion, or discoloration. If the bearings appear to be in good condition, clean them thoroughly with a solvent and inspect them for smooth rotation.

To lubricate the wheel bearings, repack them with a high-quality wheel bearing grease. Be sure to thoroughly coat all bearing surfaces with grease, working it into the rollers and races. Reinstall the bearings into the hub, taking care not to damage them. When reassembling, pay attention to the proper bearing preload. Consult the torque specifications in this guide for the correct torque for the spindle nut. Over-tightening the spindle nut can damage the bearings, while under-tightening can result in excessive play. After reassembling the wheel, spin it again to verify smooth and quiet operation. Repeat the process for the other front wheel.

Tire Pressure and Condition

Maintaining the correct tire pressure and ensuring proper tire condition are crucial for optimal performance, handling, and safety of your John Deere LT133. Under-inflated tires can lead to reduced fuel efficiency, increased tire wear, and poor handling, while over-inflated tires can result in a harsh ride, decreased traction, and increased risk of tire damage. Regularly checking and adjusting the tire pressure ensures that the tires are operating within their designed parameters, providing the best possible performance and extending their lifespan. Furthermore, keeping an eye on the tire condition allows you to identify and address any potential problems before they lead to more serious issues.

Check the tire pressure regularly using a reliable tire pressure gauge. Refer to the tire pressure recommendations listed in this guide or on the tire sidewall. It's important to check the pressure when the tires are cold, as the pressure will increase as the tires warm up during operation. Adjust the pressure as needed to match the recommended specifications. In addition to checking the pressure, visually inspect the tires for any signs of damage, such as cuts, bulges, or excessive wear. Pay particular attention to the sidewalls, as they are more susceptible to damage.

Proper tire condition includes maintaining adequate tread depth for optimal traction. Worn tires with shallow tread depths will have reduced grip, especially in wet or loose conditions. Replace tires when the tread depth reaches the wear bars, which are small raised areas in the tread grooves. When replacing tires, it's important to use tires that are the correct size and type for your LT133. Using incorrect tires can affect handling, stability, and the overall performance of the tractor. Always ensure that the tires are properly mounted and balanced to prevent vibrations and uneven wear.

Attachments and Accessories

Installing and Maintaining Attachments (Bagging System, Mulching Kit)

The John Deere LT133 tractor is a versatile machine capable of handling a variety of lawn care tasks when equipped with the appropriate attachments. Two of the most common attachments are the bagging system and the mulching kit, each offering distinct advantages for lawn maintenance. Before attempting to install or maintain any attachment, always consult the specific operator's manual for your attachment model. Proper installation and maintenance are crucial for ensuring optimal performance and longevity of both the attachment and the tractor itself. Failure to follow the manufacturer's instructions can result in damage to the equipment and potentially void warranties. Remember to always disconnect the spark plug wire before working on any part of your LT133, reducing the risk of accidental engine starting.

Installing a bagging system typically involves attaching a collection container to the rear of the tractor, along with a chute that connects to the mower deck discharge opening. Carefully align the chute and secure it with the provided hardware, ensuring a tight seal to prevent grass clippings from escaping. When installing the bagger unit, make sure all latches and connections are secure to prevent accidental detachment during operation. Regularly inspect the bag for wear and tear, especially the seams and discharge opening, and replace it if necessary. Empty the bag frequently to prevent it from becoming too heavy, which can strain the tractor's engine and potentially damage the attachment. A full bag can also affect the tractor's maneuverability and increase the risk of tipping on slopes.

A mulching kit, on the other hand, typically replaces the standard mower blades with mulching blades and includes a plug that blocks the mower deck discharge opening. Mulching blades are designed to chop grass clippings into fine pieces, which are then returned to the lawn as fertilizer. Ensure the mulching blades are installed correctly, paying close attention to the direction of rotation as indicated on the blade. Tighten the blade bolts to the manufacturer's specified torque to prevent loosening during operation. Inspect the blades regularly for wear and damage, such as nicks, cracks, or excessive dullness, and replace them as needed for optimal mulching performance. Using dull or damaged blades can result in uneven cutting and poor mulching, leading to thatch buildup and a less healthy lawn.

Maintaining both bagging systems and mulching kits involves regular cleaning to prevent the buildup of grass clippings, which can impede performance and lead to corrosion. After each use, thoroughly clean the attachment with a brush or hose to remove any accumulated debris. For bagging systems, pay particular attention to the chute and the discharge opening, ensuring they are free from obstructions. For mulching kits, inspect the underside of the mower deck and remove any compacted grass clippings that may have accumulated. Periodically inspect all hardware, such as bolts, nuts, and screws, and tighten them as needed to prevent loosening. Lubricate any moving parts as recommended by the manufacturer to ensure smooth operation and prevent premature wear.

Troubleshooting Attachment Issues

Even with proper installation and maintenance, attachments can sometimes experience problems. A common issue with bagging systems is clogging of the chute, which can occur if the grass is too wet or the clippings are too long. If you experience a clogged chute, stop the tractor immediately and disconnect the spark plug wire before attempting to clear the blockage. Use a long-handled tool to remove the clippings, being careful not to damage the chute or the mower blades. Avoid mowing wet grass whenever possible to prevent future clogging issues. Check the condition of your belt, and make sure the bag is empty.

Mulching kits can sometimes cause the mower deck to vibrate excessively if the blades are unbalanced or damaged. If you notice excessive vibration, stop the tractor immediately and inspect the blades for damage or uneven wear. Replace any damaged blades and ensure that the new blades are properly balanced before reinstalling them. Another potential issue with mulching kits is the buildup of thatch, which can occur if the clippings are not being mulched finely enough. Ensure that the blades are sharp and that the mower deck is set to the proper cutting height for your lawn type. Consider dethatching your lawn periodically to remove any excessive thatch buildup.

If you continue to experience problems with your attachments, consult the operator's manual or contact your local John Deere dealer for assistance. Provide them with as much information as possible about the issue you are experiencing, including the model number of your attachment and any relevant symptoms. They may be able to provide troubleshooting advice or recommend repairs. Remember to always prioritize safety when working on your tractor and attachments, and never attempt to perform repairs that you are not comfortable with. If a repair appears too complex, it is best to leave it to a qualified technician.

Storage and Winterization

Preparing Your LT133 for Storage

Properly preparing your John Deere LT133 for storage is crucial for its longevity and performance. Neglecting this step can lead to corrosion, fuel system issues, and battery degradation, resulting in costly repairs down the road. Before placing your LT133 into storage, thoroughly clean the machine, removing any grass clippings, dirt, or debris from the deck, engine, and surrounding areas. A clean machine is less susceptible to rust and corrosion during the storage period. Additionally, cleaning allows you to inspect for any potential maintenance needs that should be addressed before storage.

Next, stabilize the fuel system. Gasoline left sitting for extended periods can break down, forming gum and varnish deposits that clog carburetors and fuel lines. Add a fuel stabilizer to the fuel tank according to the manufacturer's instructions, ensuring it mixes thoroughly with the remaining fuel. Run the engine for a few minutes to allow the stabilized fuel to circulate throughout the fuel system, protecting it from degradation. Consider completely draining the fuel tank and carburetor for the best long-term storage, especially if storing for more than six months. This will eliminate the risk of fuel-related issues upon recommissioning.

The engine oil and filter are critical to maintaining a healthy engine. Changing the oil and filter before storage is highly recommended. Old oil contains acids and contaminants that can corrode engine components during storage. Fresh oil provides a protective barrier, preventing corrosion and ensuring smooth startup when you recommission the machine. Use the correct grade of oil specified in your operator's manual and properly dispose of the used oil.

Finally, disconnect the battery to prevent parasitic drain and potential damage. Clean the battery terminals with a wire brush to remove any corrosion and apply a thin coat of petroleum jelly to protect them. Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures. Consider using a battery maintainer to keep the battery charged during storage, preventing sulfation and extending its lifespan. A fully charged battery ensures easy starting when you're ready to use your LT133 again.

Storage Location Recommendations

The location where you store your John Deere LT133 is as important as the preparation steps. An ideal storage location protects the machine from the elements and minimizes the risk of damage. Indoor storage, such as a garage, shed, or barn, is always preferred over outdoor storage. Indoor environments provide protection from rain, snow, sun, and extreme temperature fluctuations, all of which can contribute to corrosion and degradation of the machine's components. Make sure the storage area is well-ventilated to prevent moisture build-up.

If indoor storage is not an option, choose a location that is as sheltered as possible. Cover the LT133 with a waterproof, breathable tarp to protect it from the elements. Ensure the tarp is securely fastened to prevent it from blowing away in the wind. Avoid storing the machine directly on the ground, as this can promote rust and corrosion. Place wooden blocks or a pallet under the machine to lift it off the ground and improve air circulation.

When selecting a storage location, consider potential hazards such as rodents and insects. These pests can damage wiring, upholstery, and other components of the machine. Place rodent traps or repellents around the storage area to deter them. Regularly inspect the storage area for signs of pest activity and take appropriate action if necessary. A clean and well-maintained storage area will further minimize the risk of pest infestations.

Recommissioning After Storage

Recommissioning your John Deere LT133 after storage requires a careful approach to ensure it starts smoothly and operates reliably. Before attempting to start the engine, thoroughly inspect the machine for any signs of damage or deterioration. Check the tires for proper inflation and look for cracks or dry rot. Inspect the belts and hoses for signs of wear or cracking and replace them if necessary. A thorough inspection can prevent potential breakdowns and ensure safe operation.

Reconnect the battery and ensure the terminals are clean and secure. Check the fuel level and add fresh gasoline if necessary. If you drained the fuel tank and carburetor before storage, add a small amount of stabilized fuel to the carburetor to prime it. Check the engine oil level and add oil if needed. If the oil has been in the engine for more than a year, consider changing it again before starting.

Before starting the engine, engage the parking brake and ensure the mower deck is disengaged. Turn the ignition key to the "on" position and listen for any unusual noises. If the engine does not start after a few attempts, check the spark plug and ensure it is clean and properly gapped. If the spark plug is fouled, replace it with a new one. Once the engine starts, allow it to warm up for a few minutes before engaging the mower deck or operating the machine.

Finally, perform a test run to ensure the machine is operating smoothly. Check the mower deck for proper cutting performance and listen for any unusual noises or vibrations. If you notice any problems, address them immediately. By following these recommissioning steps, you can ensure your John Deere LT133 is ready to provide years of reliable service.