Proper lubrication is the lifeblood of your John Deere 2351. Neglecting lubrication can lead to premature wear, increased operating temperatures, and ultimately, component failure. Adhering to the lubrication schedule outlined in this manual is crucial for maximizing the lifespan and performance of your machine. Always use the recommended lubricants specified by John Deere, as these are formulated to meet the specific demands of the various components. Using inferior or incorrect lubricants can actually do more harm than good, potentially damaging seals and bearings. Make sure all grease fittings are clean before applying grease to prevent contaminants from entering the system.
The frequency of lubrication depends on the operating conditions and the specific component. Components that experience high loads or operate in dusty environments may require more frequent lubrication. Refer to the lubrication chart for specific intervals for each grease fitting. The most commonly greased locations include the steering axle pivot points, the front wheel bearings, and the various linkage points in the hydraulic system. A good practice is to wipe away excess grease after lubrication to prevent dirt and debris from adhering to the fitting and surrounding area. Remember, a little preventative maintenance goes a long way in keeping your John Deere 2351 running smoothly.
Regular replacement of filters is essential for maintaining the cleanliness of the fluids circulating throughout your John Deere 2351. Filters remove contaminants such as dirt, metal particles, and debris, preventing them from damaging sensitive components. There are several critical filters that require periodic replacement, including the engine oil filter, the fuel filter, the hydraulic oil filter, and the air filter. Neglecting filter replacement can lead to reduced performance, increased wear, and even catastrophic failure of the engine, hydraulic system, or fuel system. Always use genuine John Deere filters or equivalent quality filters that meet the manufacturer's specifications.
The frequency of filter replacement is typically specified in terms of operating hours. However, it's also important to consider the operating conditions. In dusty or dirty environments, filters may need to be replaced more frequently. Before removing a filter, ensure that the area around it is clean to prevent contaminants from entering the system when the filter is removed. Dispose of used filters properly, following local environmental regulations. When installing a new filter, lubricate the seal with clean oil to ensure a proper seal and prevent leaks. After replacing filters, check the fluid levels and top off as needed.
Maintaining proper fluid levels is critical for the optimal performance and longevity of your John Deere 2351. Regularly checking and adjusting fluid levels ensures that all components are properly lubricated and cooled. The most important fluid levels to monitor include the engine oil, the coolant, the hydraulic oil, and the transmission/transaxle oil. Low fluid levels can lead to overheating, increased wear, and even component failure. Conversely, overfilling fluid levels can also cause problems, such as foaming or leaks. Always check fluid levels with the machine on a level surface and the engine off.
Use the dipsticks or sight glasses provided to accurately check fluid levels. Refer to the appropriate section of this manual for the correct fluid levels for each system. When adding fluid, use the recommended type and grade of fluid specified by John Deere. Be careful not to overfill, and wipe up any spills immediately. Inspect the fluid for any signs of contamination, such as discoloration or the presence of metal particles. If contamination is suspected, investigate the cause and take corrective action, such as replacing filters or flushing the system. Regular fluid level checks are a simple but effective way to prevent costly repairs and keep your John Deere 2351 running smoothly.
Before tearing into an engine, a thorough diagnostic check is crucial for accurate and efficient repairs. Start by visually inspecting the engine for any obvious signs of damage, such as leaks, cracks, or frayed wiring. Carefully examine the coolant and oil levels, checking for any unusual colors or textures that might indicate contamination. Use a scan tool to retrieve any stored diagnostic trouble codes (DTCs) from the engine control unit (ECU), as these codes can provide valuable clues about the source of the problem. Pay close attention to the engine's performance during operation, noting any unusual noises, vibrations, or hesitations that may occur.
A compression test is another essential diagnostic procedure to assess the condition of the engine's cylinders. This test involves using a compression gauge to measure the pressure in each cylinder as the engine is cranked over. Low compression in one or more cylinders can indicate worn piston rings, damaged valves, or a blown head gasket. Compare the compression readings from each cylinder to the manufacturer's specifications to determine if any cylinders are outside the acceptable range. It's also wise to perform a cylinder leakage test, which involves pressurizing each cylinder with compressed air and listening for leaks in the intake, exhaust, or cooling system.
Proper fuel system maintenance is vital for ensuring optimal engine performance and fuel efficiency. Begin by inspecting the fuel lines and connections for any signs of leaks, cracks, or deterioration. Replace any damaged fuel lines or fittings immediately to prevent fuel leaks and potential fire hazards. Check the fuel filter regularly, as a clogged fuel filter can restrict fuel flow and cause the engine to run poorly. Refer to the manufacturer's recommendations for the proper fuel filter replacement interval, and always use a high-quality filter designed for your specific engine.
Fuel injectors play a critical role in delivering the correct amount of fuel to the engine's cylinders. Over time, fuel injectors can become clogged or dirty, affecting their spray pattern and fuel delivery. If you suspect that your fuel injectors are not functioning properly, consider having them professionally cleaned or replaced. You can use a fuel injector cleaner additive to help remove deposits and improve fuel injector performance, but always follow the manufacturer's instructions carefully. Be sure to inspect the fuel pump for proper operation and pressure, as a failing fuel pump can lead to fuel starvation and engine problems.
The cooling system is responsible for regulating the engine's temperature and preventing overheating. Regular maintenance of the cooling system is essential for avoiding costly engine damage. Start by checking the coolant level in the radiator and overflow reservoir regularly. Ensure that the coolant is at the correct level and is free from any signs of contamination, such as rust or sludge. Inspect the radiator hoses for any cracks, leaks, or bulges, and replace them as needed. Check the radiator cap for proper sealing, as a faulty radiator cap can cause the cooling system to lose pressure and overheat.
The thermostat is a critical component of the cooling system that regulates the flow of coolant to the radiator. A malfunctioning thermostat can cause the engine to run too hot or too cold, both of which can have negative effects on engine performance and longevity. If you suspect that your thermostat is not functioning properly, replace it with a new one that meets the manufacturer's specifications. Flush the cooling system periodically to remove any accumulated sediment or debris. Refill the cooling system with the correct type and concentration of coolant, following the manufacturer's recommendations.
An engine overhaul is a major undertaking that involves disassembling the engine, inspecting all of its components, and replacing any worn or damaged parts. This is typically done when the engine has reached the end of its service life or has sustained significant damage. Before beginning an engine overhaul, make sure you have the necessary tools, equipment, and technical information. Refer to the manufacturer's service manual for detailed instructions and specifications. Carefully label and organize all of the engine's components as you disassemble it to ensure that you can reassemble it correctly.
Thoroughly clean and inspect all of the engine's components for wear, damage, or defects. Replace any worn piston rings, bearings, seals, and gaskets. Have the cylinder head inspected and machined as needed to ensure proper sealing and valve operation. Reassemble the engine according to the manufacturer's specifications, paying close attention to torque values and clearances. After reassembling the engine, prime the oil system and perform a break-in procedure to ensure that the engine runs smoothly and efficiently. It is also wise to perform an oil and filter change after the engine break-in period has completed.
Understanding the wiring diagrams for your John Deere 2351 is crucial for diagnosing and repairing electrical issues. These diagrams are not merely roadmaps; they are the blueprints of your tractor's nervous system. Each wire, connector, and component is meticulously represented, allowing you to trace circuits, identify potential shorts, and pinpoint the source of electrical malfunctions. Before attempting any electrical repair, always consult the wiring diagram specific to your tractor model and year. Keep a clean copy readily available and familiarize yourself with the symbols and color codes used throughout the diagram.
The wiring diagrams will show you the location of fuses and relays, which are often the first places to check when experiencing electrical problems. Fuses are designed to protect circuits from overloads, and a blown fuse indicates a potential issue somewhere within that circuit. Relays act as electrical switches, controlling larger current flows with a smaller control signal. Knowing the location and function of each fuse and relay will save you considerable time during troubleshooting. Remember to always replace a blown fuse with one of the same amperage rating to avoid further damage to the system.
When tracing wires, pay close attention to the color codes indicated on the wiring diagram. These color codes provide a quick and easy way to identify individual wires and their functions. Using a multimeter, you can verify the continuity of a wire to ensure it is not broken or corroded internally. Electrical connections can also be a source of problems, so inspect connectors for corrosion, loose connections, and damaged wiring. Cleaning and securing these connections can often resolve intermittent electrical issues.
The starter and alternator are critical components of your tractor's electrical system, responsible for starting the engine and maintaining battery charge, respectively. The starter motor utilizes a high current draw from the battery to turn the engine's flywheel, initiating the combustion process. Over time, the starter motor can wear down due to frequent use or exposure to harsh conditions. Common issues include worn brushes, a faulty solenoid, or a malfunctioning starter drive. Regular inspection and maintenance can prevent unexpected starter failures.
When diagnosing starter problems, begin by checking the battery voltage and connections. A weak battery or corroded terminals can prevent the starter from engaging properly. If the battery and connections are good, use a multimeter to test the voltage at the starter solenoid when the key is turned to the start position. If there is no voltage, the problem may lie in the ignition switch, wiring, or safety interlock system. If voltage is present but the starter still doesn't engage, the starter motor itself is likely the culprit and may require rebuilding or replacement.
The alternator is responsible for charging the battery and providing power to the tractor's electrical system while the engine is running. A failing alternator can lead to a dead battery and prevent the tractor from starting. Common alternator problems include worn brushes, a faulty voltage regulator, or a damaged stator. To test the alternator's output, use a multimeter to measure the voltage at the battery terminals while the engine is running. A healthy alternator should produce a voltage between 13.5 and 14.5 volts. If the voltage is significantly lower or higher, the alternator may need to be repaired or replaced.
Properly functioning lighting and indicator systems are essential for safe operation, especially during low-light conditions or when operating on public roads. The lighting system includes headlights, taillights, turn signals, and work lights, providing visibility and signaling intentions to other drivers. The indicator system includes gauges, warning lights, and alarms, alerting the operator to potential problems with the tractor's systems, such as low oil pressure, high coolant temperature, or low fuel level. Regular inspection and maintenance of these systems are critical for preventing accidents and ensuring the tractor operates within safe parameters.
When troubleshooting lighting problems, start by checking the bulbs and fuses. A blown bulb or fuse is the most common cause of lighting failures. If the bulbs and fuses are good, inspect the wiring and connections for corrosion, loose connections, or damaged wiring. Use a multimeter to test the voltage at the bulb socket to ensure power is reaching the bulb. If there is no voltage, trace the wiring back to the switch or power source to identify the problem. Applying dielectric grease to electrical connections can prevent corrosion and ensure reliable operation.
Indicator systems rely on sensors and switches to monitor various parameters of the tractor's operation. When a sensor detects a problem, it sends a signal to the indicator system, which then activates a warning light or alarm. To diagnose indicator system problems, consult the wiring diagram to identify the sensor and its associated wiring. Use a multimeter to test the sensor's output and verify that it is sending the correct signal to the indicator system. If the sensor is faulty, it will need to be replaced. Always refer to the service manual for the correct procedures and specifications for testing and replacing sensors.
The hydraulic system on your John Deere 2351 is the lifeblood of many essential functions, from lifting implements to powering steering and brakes. Understanding its operation and maintenance is crucial for ensuring the longevity and optimal performance of your tractor. This chapter delves into the key components of the hydraulic system, outlining inspection procedures, repair techniques, and troubleshooting methods. Proper maintenance and timely repairs will prevent costly downtime and ensure the safe and efficient operation of your agricultural equipment.
The hydraulic pump is the heart of the system, responsible for generating the hydraulic pressure needed to power various components. Before attempting any service, it is paramount to ensure the tractor is switched off, the parking brake is engaged, and the hydraulic system is de-pressurized. Begin by visually inspecting the pump for any signs of leaks, cracks, or physical damage. Check the hydraulic fluid level in the reservoir and ensure it is within the recommended range, using the correct type of fluid specified in the operator's manual. Contaminated or low fluid levels can severely impact pump performance and lifespan.
If the hydraulic pump is suspected of malfunctioning, a pressure test should be performed to determine its output capacity. Using a calibrated pressure gauge and appropriate test fittings, connect to the pump's outlet port and measure the pressure at various engine speeds. Compare the readings against the specifications outlined in the technical manual to ascertain if the pump is delivering adequate pressure. If the pressure is below the specified range, the pump may require internal repair or replacement, depending on the severity of the wear and tear.
To service the hydraulic pump, disconnect the hydraulic lines, taking care to cap them immediately to prevent contamination. Remove the pump from the tractor, following the specific instructions outlined in the service manual for your model. Once removed, carefully disassemble the pump, inspecting all internal components for wear, scoring, or damage. Pay close attention to the condition of the gears, bearings, seals, and housing. Replace any worn or damaged parts with genuine John Deere replacement components to ensure proper fit and performance. After reassembly, prime the pump with hydraulic fluid before installation to prevent cavitation and ensure immediate operation.
The valve body is responsible for directing hydraulic fluid to the various components that require it, such as hydraulic cylinders and motors. Over time, the valve body can become clogged with debris or experience wear on the internal valves and seals, leading to reduced performance or malfunctions. When diagnosing issues with the hydraulic system, the valve body should be considered as a potential source of problems. If a particular function is not working correctly, and the pump and cylinder are functioning properly, the valve body might be to blame.
Before disassembling the valve body, thoroughly clean the exterior to prevent dirt and debris from entering the internal components. Carefully disconnect the hydraulic lines, labeling each one to ensure proper reassembly. Pay close attention to the location and orientation of any shims, springs, or other small parts as they are removed. It is highly recommended to take photographs or create a diagram to aid in the reassembly process. Clean each valve body component using a solvent and inspect for wear, scoring, or damage.
Replace any worn or damaged O-rings, seals, or valves with genuine John Deere replacement parts. When reassembling the valve body, ensure that all components are properly lubricated with hydraulic fluid. Torque all fasteners to the specified torque values outlined in the service manual. After reinstallation, bleed the hydraulic system to remove any trapped air. Test the operation of each hydraulic function to ensure that the valve body is working correctly.
Hydraulic cylinders are used to provide linear force for various tasks on the tractor, such as lifting implements and steering. Over time, the seals within the cylinders can wear out, leading to leaks and reduced performance. Rebuilding hydraulic cylinders is a common maintenance task that can extend their lifespan and prevent costly replacements. Before starting any work, disconnect the hydraulic lines from the cylinder and relieve any pressure within the system. Secure the cylinder in a vise or other suitable fixture to prevent it from moving during disassembly.
Loosen and remove the cylinder gland, being careful not to damage the threads. Once the gland is removed, carefully slide the piston and rod assembly out of the cylinder barrel. Inspect the cylinder bore for any signs of scoring, rust, or pitting. Minor imperfections can often be honed out, but severe damage may require replacement of the cylinder barrel. Remove the piston from the rod and inspect the seals and wear bands for damage or wear. Replace all seals, O-rings, and wear bands with new components.
Before reassembling the cylinder, thoroughly clean all parts and lubricate the seals with hydraulic fluid. Carefully slide the piston and rod assembly back into the cylinder barrel, ensuring that the seals are properly seated. Reinstall the cylinder gland and torque it to the specified torque value. After reinstallation, bleed the hydraulic system to remove any trapped air. Test the cylinder to ensure that it operates smoothly and without leaks. Extend and retract the cylinder several times to verify proper operation.
Troubleshooting hydraulic issues requires a systematic approach. Start by observing the symptoms and gathering information about when the problem occurs. Common symptoms include slow operation, lack of power, leaks, and unusual noises. Inspect the hydraulic fluid level and condition. Low fluid levels can cause cavitation and reduced performance, while contaminated fluid can damage hydraulic components. Check the hydraulic lines and fittings for leaks or damage. Even small leaks can cause a significant loss of pressure.
Use a pressure gauge to test the output pressure of the hydraulic pump. Low pressure can indicate a worn pump or a blocked filter. Check the hydraulic filters and replace them if they are clogged. Clogged filters can restrict flow and reduce system performance. Inspect the hydraulic cylinders for leaks or damage. Leaking cylinders can cause a loss of power and slow operation. Check the valve body for sticking valves or internal leaks. Sticking valves can prevent hydraulic fluid from flowing to the correct components.
If you suspect a specific component is malfunctioning, isolate it from the rest of the system and test it independently. For example, you can test a hydraulic cylinder by disconnecting it from the rest of the system and applying pressure to it directly. If the cylinder operates correctly when isolated, the problem is likely elsewhere in the system. If you are unable to diagnose the problem yourself, consult a qualified hydraulic technician. They have the expertise and equipment to diagnose and repair complex hydraulic systems.
Properly diagnosing transmission issues in your John Deere 2351 is critical to minimizing downtime and preventing further damage. Begin by thoroughly inspecting the transmission housing for any signs of leaks, cracks, or external damage. Fluid leaks can indicate failing seals, gaskets, or even a compromised housing, which can lead to low fluid levels and eventual transmission failure. Additionally, visually inspect the shift linkages and levers for any signs of wear, looseness, or binding, as these can cause shifting problems.
After the visual inspection, perform a functional test by operating the tractor through all gears and observing for any unusual noises, slippage, or difficulty shifting. Grinding noises can indicate worn or damaged gears, while slippage often points to worn clutch plates or low hydraulic pressure. Carefully note the specific gears where problems occur, as this can help pinpoint the location of the issue within the transmission. Always ensure the tractor is safely supported and properly blocked before attempting to operate the transmission in a stationary position.
If issues persist, a pressure test of the transmission hydraulic system is recommended. Use a calibrated pressure gauge connected to the appropriate test ports to verify that the hydraulic pump is producing the correct pressure and that the pressure regulators are functioning properly. Low hydraulic pressure can starve the transmission of lubrication and cause premature wear to gears and bearings. Also, if equipped, inspect the transmission filter for any signs of debris or contamination, which can indicate internal wear or damage. Replacing a clogged filter can improve transmission performance and extend its lifespan.
The clutch is a critical component of the John Deere 2351, responsible for engaging and disengaging the engine from the transmission. Proper clutch adjustment is essential for smooth operation and preventing premature wear. Over time, the clutch disc will wear down, leading to slippage and difficulty shifting. The initial step involves checking the clutch pedal free play, which is the amount of travel the pedal has before it begins to engage the clutch. Refer to the manufacturer's specifications for the correct free play setting, as this varies depending on the model and clutch type.
To adjust the clutch, locate the adjustment mechanism, typically found on the clutch linkage or pedal assembly. Loosen the lock nut and turn the adjusting bolt or nut to increase or decrease the free play as needed. After making the adjustment, tighten the lock nut to secure the setting. It is crucial to ensure that the clutch pedal returns fully to its upright position after being released, as this prevents the clutch from dragging and causing wear. If the clutch cannot be adjusted to the correct free play, it may indicate that the clutch disc is worn beyond its service limit and needs replacement.
Replacing the clutch is a more involved procedure that typically requires splitting the tractor between the engine and transmission. Before beginning the replacement, disconnect the battery and drain the transmission fluid to prevent spillage. Carefully separate the tractor halves, ensuring that all necessary linkages, wiring harnesses, and hydraulic lines are disconnected. Inspect the flywheel for wear or damage, and resurface or replace it if necessary. Install a new clutch disc, pressure plate, and throw-out bearing, following the manufacturer's instructions carefully. After reassembling the tractor, adjust the clutch free play to the correct setting and refill the transmission fluid.
The differential and axles are responsible for transmitting power from the transmission to the wheels, allowing the tractor to turn corners smoothly. Regular maintenance and inspection of these components are crucial for preventing costly repairs. Begin by checking the differential oil level and condition. Low oil levels can lead to overheating and premature wear of the differential gears and bearings. The oil should be clean and free of debris or contamination. If the oil is milky or contains metal shavings, it indicates water contamination or internal wear, respectively, and requires immediate attention.
To service the differential, drain the old oil and inspect the differential housing for any signs of leaks or damage. Remove the differential cover and visually inspect the gears and bearings for wear, cracks, or pitting. Replace any worn or damaged components as needed. When reassembling the differential, use new gaskets and seals to prevent leaks. Fill the differential with the recommended type and quantity of oil. Also, inspect the axle seals for leaks. Leaking axle seals can allow oil to escape and contaminate the brake linings, reducing their effectiveness.
Servicing the axles involves removing the wheel and axle housing. Inspect the axle shaft for wear, cracks, or bending. Replace any damaged axles. Inspect the axle bearings for wear or looseness. Replace any worn bearings and repack the bearing with grease. Also, inspect the brake components for wear or damage. Replace any worn brake pads, shoes, or rotors. When reassembling the axle, use new gaskets and seals to prevent leaks. Tighten all bolts to the specified torque.
The driveline, including the driveshaft and universal joints (U-joints), is responsible for transmitting power from the transmission to the axles on four-wheel-drive models. Regular maintenance of the driveline is essential for preventing vibration, noise, and premature failure. Begin by visually inspecting the driveshaft for any signs of damage, such as dents, bends, or cracks. A damaged driveshaft can cause significant vibration and potentially lead to catastrophic failure. Also, check the U-joints for play or looseness. Worn U-joints can cause vibration and noise, and if left unchecked, can eventually fail, resulting in loss of power and potential damage to other components.
To maintain the driveline, grease the U-joints regularly with a high-quality grease designed for heavy-duty applications. Use a grease gun to inject grease into the grease fittings until fresh grease appears, which indicates that the old grease and contaminants have been flushed out. Check the driveshaft slip yoke for proper lubrication. A dry slip yoke can cause binding and vibration. Lubricate the slip yoke with a special slip yoke grease designed to prevent fretting corrosion.
Periodically, the driveshaft should be removed and inspected more thoroughly. Check the U-joint yokes for wear or damage. Replace any worn or damaged yokes. Inspect the driveshaft for balance. An unbalanced driveshaft can cause vibration. Have the driveshaft professionally balanced if necessary. When reinstalling the driveshaft, align the driveshaft correctly and torque all bolts to the specified torque. Failure to do so can cause vibration and damage to the driveshaft and other components.
The braking system on your John Deere 2351 is a critical safety component and requires regular inspection and maintenance. Neglecting your brakes can lead to diminished stopping power, uneven wear, and potentially dangerous operating conditions. This chapter outlines the necessary procedures for brake adjustment, pad replacement, and basic hydraulic brake service. Always prioritize safety when working on braking systems, and consult a qualified mechanic if you are not comfortable performing any of the following procedures. Remember to consult the exploded diagrams in the appendix for specific parts identification and placement.
Proper brake adjustment is essential for ensuring even braking force across all wheels, preventing premature wear and maximizing brake life. Over time, the friction material on the brake pads wears down, increasing the distance the brake pedal must travel before the brakes engage. This can result in a spongy feel in the pedal and reduced braking effectiveness. Adjusting the brakes compensates for this wear, restoring proper pedal feel and ensuring optimal braking performance. It is recommended to check and adjust your brakes at regular intervals, especially after periods of heavy use or if you notice any changes in braking performance.
The John Deere 2351 typically utilizes a mechanical adjustment system, usually located near the brake pedal or within the brake drum assembly. Consult your tractor's specific service manual for the exact location and adjustment procedure. The procedure generally involves loosening a lock nut and turning an adjusting bolt or screw until the proper pedal free play is achieved. Pedal free play refers to the amount of travel the brake pedal has before the brakes start to engage. Too much free play results in delayed braking, while too little can cause the brakes to drag, leading to overheating and premature wear.
After making the adjustment, be sure to tighten the lock nut securely to prevent the adjuster from loosening during operation. It's crucial to check the brake pedal free play again after tightening the lock nut to ensure that the adjustment hasn't changed. Test the brakes by operating the tractor at a low speed and applying the brakes firmly. The tractor should stop smoothly and evenly. If the brakes feel spongy or uneven, re-check the adjustment procedure and make any necessary corrections. If the problem persists, there may be other issues with the braking system that require further investigation.
Worn brake pads are a common cause of reduced braking performance and can also damage the brake rotors if not replaced in a timely manner. Brake pads wear down over time due to friction generated during braking. As the friction material wears thin, the braking effectiveness diminishes, and the risk of rotor damage increases. Regular inspection of your brake pads is crucial to identify wear before it becomes a safety hazard. Listen for squealing or grinding noises when applying the brakes, which can be an indication of worn brake pads.
Replacing brake pads requires removing the brake caliper assembly, which typically involves unbolting it from the brake rotor housing. Before removing the caliper, ensure that the parking brake is disengaged and the tractor is securely supported on jack stands. Disconnect the brake line from the caliper, being careful to prevent fluid spillage. Have a container ready to catch any dripping brake fluid. After the brake line is disconnected, you can remove the caliper and access the brake pads.
Carefully remove the old brake pads from the caliper. Note the orientation of the pads, as they may be different on each side of the caliper. Clean the caliper thoroughly with brake cleaner to remove any dirt, grime, or brake dust. Inspect the caliper piston for any signs of damage or corrosion. If the piston is damaged, it may need to be replaced or rebuilt. Install the new brake pads into the caliper, ensuring that they are properly seated. Reinstall the caliper onto the brake rotor housing, torqueing the bolts to the manufacturer's specifications. Reconnect the brake line and bleed the brakes to remove any air from the system.
Bleeding the brakes is essential after replacing brake pads to ensure proper brake function. Air in the brake lines can compress, reducing braking effectiveness and causing a spongy pedal feel. The bleeding procedure typically involves opening a bleed valve on the caliper while someone presses the brake pedal. This allows air and fluid to escape from the system. Repeat this process until all the air is removed and only clean brake fluid is flowing from the bleed valve. Be sure to maintain the brake fluid level in the master cylinder during the bleeding process to prevent air from entering the system.
The hydraulic brake system relies on brake fluid to transmit pressure from the brake pedal to the brake calipers, which in turn activate the brakes. Over time, brake fluid can become contaminated with moisture and debris, reducing its effectiveness and potentially damaging the brake system components. Regular brake fluid flushes are essential for maintaining the health and performance of the hydraulic brake system. A brake fluid flush involves completely replacing the old brake fluid with fresh fluid.
Signs of contaminated brake fluid include a dark or discolored appearance, a spongy brake pedal feel, and reduced braking effectiveness. Moisture in the brake fluid can cause corrosion of internal brake system components, leading to leaks and failures. It's recommended to flush the brake fluid at least every two years or as specified in your tractor's service manual. Always use the recommended type of brake fluid for your John Deere 2351, as using the wrong type can damage the brake system.
To flush the brake fluid, start by removing the old fluid from the master cylinder using a syringe or vacuum pump. Fill the master cylinder with fresh brake fluid. Starting at the brake caliper farthest from the master cylinder, open the bleed valve and allow the old fluid to drain out. Continue adding fresh fluid to the master cylinder as the old fluid is being drained. Once the fluid coming out of the bleed valve is clean and clear, close the valve and move on to the next caliper. Repeat this process for all the calipers, working from the farthest to the closest. Be sure to check the brake pedal feel after flushing the system. It should be firm and responsive.
In addition to fluid flushes, regular inspection of the brake lines and hoses is also important. Look for any signs of cracks, leaks, or bulges. Damaged brake lines can leak fluid, reducing braking effectiveness and potentially causing a complete brake failure. If you find any damaged brake lines, they should be replaced immediately. Always use high-quality replacement brake lines that are specifically designed for your John Deere 2351. Proper maintenance of the hydraulic brake system is critical for ensuring safe and reliable braking performance.
The steering linkage is a critical component of your John Deere 2351, directly translating steering wheel input into directional changes at the wheels. Regular inspection and maintenance are vital to ensure safe and responsive operation. Over time, ball joints, tie rod ends, and other linkage components can wear, resulting in excessive play, imprecise steering, and even potential component failure. Ignoring these symptoms can lead to dangerous situations, particularly when operating at higher speeds or on uneven terrain. This section outlines the proper procedures for inspecting, diagnosing, and repairing common steering linkage issues.
Before beginning any repairs, thoroughly clean the area around the affected linkage components. This will prevent dirt and debris from entering the system and causing further damage. Carefully inspect each ball joint, tie rod end, and steering arm for signs of wear, such as looseness, cracks, or excessive play. To check for play, firmly grasp each component and try to move it back and forth. Any noticeable movement indicates wear and the need for replacement. Remember to consult your parts manual to ensure you are using the correct replacement parts for your specific model.
When replacing steering linkage components, ensure that all fasteners are tightened to the manufacturer's specified torque values. Over-tightening can damage the components, while under-tightening can lead to premature failure. Use a torque wrench to achieve the correct torque and always follow the torque sequence outlined in the service manual. After completing the repairs, perform a thorough steering alignment to ensure proper handling and prevent uneven tire wear. Consider consulting with a professional alignment specialist if you are not comfortable performing this task yourself.
The power steering system on the John Deere 2351 utilizes hydraulic pressure to assist the operator in steering the tractor, reducing the effort required to turn the wheels. Proper functioning of the power steering system is crucial for operator comfort and safety, especially during prolonged use or when operating with heavy implements. This section will cover the essential maintenance and service procedures necessary to keep your power steering system operating at peak performance.
Regularly check the power steering fluid level in the reservoir. Low fluid levels can indicate leaks in the system and can cause the pump to cavitate, leading to reduced performance and eventual failure. Use only the recommended type of power steering fluid, as specified in your operator's manual. Using the wrong type of fluid can damage the pump and seals. Inspect the hoses and connections for leaks, cracks, or damage. Replace any damaged components immediately to prevent fluid loss and maintain system pressure.
If you experience difficulty steering or hear unusual noises from the power steering pump, it may indicate a problem with the pump itself. Before replacing the pump, check the drive belt tension and condition. A loose or worn belt can cause the pump to slip, resulting in reduced pressure. If the belt is in good condition, the pump may need to be rebuilt or replaced. Always bleed the air from the power steering system after performing any repairs or replacing components. This can be done by turning the steering wheel from lock to lock several times while monitoring the fluid level in the reservoir.
Proper refrigerant charging is crucial for the efficient operation and longevity of your John Deere 2351's air conditioning system. Undercharging or overcharging can lead to reduced cooling performance, compressor damage, and potential system leaks. It is imperative to use the correct refrigerant type specified for your tractor model, typically R-134a. Before beginning the charging process, ensure that all system components are in good working order, including the compressor, condenser, evaporator, and expansion valve. Any leaks must be repaired before attempting to recharge the system, or the refrigerant will simply escape, rendering the process futile.
The charging procedure typically involves connecting a manifold gauge set to the high and low-pressure service ports on the air conditioning system. Use a vacuum pump to evacuate the system for a minimum of 30 minutes to remove any moisture or air. Once a vacuum is established, carefully add the correct amount of refrigerant based on the manufacturer's specifications, which can be found in the technical manual or on a sticker located near the compressor. Monitor the high and low-side pressures with the engine running and the air conditioning system engaged to ensure they are within the recommended range. Slight adjustments to the refrigerant charge may be necessary to achieve optimal cooling performance.
The compressor is the heart of the air conditioning system, responsible for circulating the refrigerant throughout the loop. Regular inspection of the compressor is vital to identify potential problems before they escalate into major repairs. Listen for unusual noises, such as squealing, grinding, or knocking, which could indicate bearing failure or internal damage. Check the compressor clutch for proper engagement and disengagement when the air conditioning system is turned on and off. Ensure the compressor is securely mounted and that all electrical connections are clean and tight.
If the compressor fails or shows signs of significant wear, it may need to be replaced. Before replacing the compressor, thoroughly flush the entire air conditioning system to remove any debris or contaminants that could damage the new compressor. Install a new receiver-drier to absorb any residual moisture and filter out contaminants. Always use a high-quality compressor that is specifically designed for your John Deere 2351. After installing the new compressor, properly charge the system with refrigerant as described in the previous section.
Over time, various components of the air conditioning system may need to be replaced due to wear, corrosion, or damage. The condenser, located in front of the radiator, is responsible for dissipating heat from the refrigerant. The evaporator, located inside the cab, absorbs heat from the cabin air, providing cooling. The expansion valve controls the flow of refrigerant into the evaporator. The receiver-drier filters the refrigerant and removes moisture. Inspect these components regularly for leaks, corrosion, or physical damage.
When replacing any air conditioning component, it is essential to follow proper procedures to avoid contaminating the system. Always discharge the refrigerant using a certified recovery machine before disconnecting any lines. Use new O-rings and seals when connecting components to prevent leaks. Flush the system thoroughly after replacing a component to remove any debris. When installing a new receiver-drier, be sure to evacuate the system for an extended period to remove any moisture. After replacing all the necessary parts, recharge the system with the correct amount of refrigerant and check for leaks.
Modern John Deere 2351 tractors utilize an advanced electronic control system to monitor various engine and hydraulic functions. This system is capable of detecting faults and storing diagnostic trouble codes (DTCs) in the tractor's memory. These codes provide valuable information about potential problems, significantly reducing troubleshooting time. Accessing and interpreting these codes is crucial for efficient repairs. Refer to the operator's manual for instructions on how to view the diagnostic codes displayed on the instrument panel, or connect a diagnostic tool for more in-depth analysis.
When troubleshooting, always record the DTCs that are present. These codes often consist of a series of numbers and letters that correspond to a specific fault or sensor malfunction. Once you have recorded the DTCs, consult the appropriate diagnostic code list in this manual or on the John Deere service portal. The code description will give you a starting point for your investigation. Understanding the meaning of each digit and letter within the code is essential, as they often indicate the circuit, sensor, or component that is experiencing issues.
It's important to remember that a DTC indicates a potential problem, but it doesn't always pinpoint the exact cause. The code identifies the circuit or component where the problem exists, but further testing may be needed to determine the root cause. For example, a code indicating a faulty pressure sensor might actually be caused by a wiring issue, a clogged hydraulic filter, or a failing hydraulic pump. Therefore, using DTCs in conjunction with other troubleshooting methods, such as visual inspection and symptom-based analysis, is critical for accurate diagnosis.
If no diagnostic codes are present, or if the codes don't directly lead to the problem, symptom-based troubleshooting is the next logical step. This approach involves carefully observing the tractor's behavior and identifying the specific symptoms that indicate a problem. Begin by gathering as much information as possible from the operator about the circumstances surrounding the issue. When did the problem start? What were the operating conditions? Are there any unusual noises or smells? These details can provide valuable clues.
After gathering information, conduct a thorough visual inspection of the tractor. Look for obvious signs of damage, such as leaks, frayed wires, loose connections, or broken components. Pay close attention to the areas that are most likely to be affected based on the symptoms. For example, if the engine is running rough, check the air filter, fuel lines, and spark plugs. If the hydraulic system is performing poorly, inspect the hydraulic lines, pump, and cylinders. Remember to always follow safety precautions when inspecting the tractor, such as disconnecting the battery and wearing appropriate personal protective equipment.
Once you have identified the symptoms and conducted a visual inspection, you can begin to narrow down the possible causes. Use a process of elimination to systematically test different components and systems. Start with the simplest and most likely causes first, and then move on to more complex possibilities. Consult the troubleshooting charts and diagrams in this manual for guidance on how to test specific components and systems. Remember to document your findings and keep track of the steps you have taken. This will help you avoid unnecessary repetition and ensure a more efficient troubleshooting process.
Fault isolation is the process of systematically narrowing down the source of a problem within a specific system or component. This typically involves using specialized tools and techniques to test individual parts and circuits. Before starting fault isolation, make sure you have a good understanding of the system you are working on. Refer to the system diagrams and component descriptions in this manual. It is also important to have the necessary tools and equipment, such as a multimeter, pressure gauge, and hydraulic flow meter.
When isolating faults, start by checking the power supply and ground connections to the affected system or component. A poor connection can cause a variety of problems, so it's important to rule this out first. Use a multimeter to check the voltage and continuity of the power and ground circuits. If the power supply and ground connections are good, then you can move on to testing individual sensors and actuators. Use the appropriate testing procedures outlined in this manual to verify that each component is functioning correctly.
If you are unable to isolate the fault using standard testing procedures, you may need to use more advanced diagnostic techniques. This could involve using a signal generator to simulate sensor inputs, or using an oscilloscope to analyze electrical signals. Always follow the safety precautions outlined in this manual when performing advanced diagnostic procedures. If you are not comfortable with these techniques, it is best to seek assistance from a qualified technician. Remember that proper fault isolation is critical for ensuring that repairs are effective and long-lasting.
Engine removal from a John Deere 2351 tractor is a complex process requiring meticulous attention to detail and proper tooling. Before commencing any work, ensure the tractor is parked on a level surface, the parking brake is engaged, and the engine is cool to prevent burns. Disconnect the negative battery cable to eliminate the risk of electrical shorts during disassembly. Gather all necessary tools, including wrenches, sockets, screwdrivers, and potentially an engine hoist or lifting equipment rated for the engine's weight. A thorough understanding of the engine's layout and associated systems is crucial for a safe and efficient removal process. Always consult the parts catalog for proper replacement parts and ensure all replaced parts are in compliance with John Deere standards.
The initial steps involve disconnecting all systems linked to the engine. This includes carefully disconnecting the fuel lines, coolant hoses, and electrical wiring harnesses. Label each connection with masking tape and a permanent marker to ensure proper reassembly later. Drain the coolant and engine oil into appropriate containers for environmentally responsible disposal. Remove the air cleaner assembly and exhaust system components. Disconnect the throttle linkage, clutch linkage, and any other mechanical connections between the engine and the tractor's chassis. Take extreme care when handling fuel and coolant to avoid spills and potential environmental contamination. Safety glasses and gloves are highly recommended throughout this process.
With all external systems disconnected, the engine is now ready for physical removal. Attach the engine hoist securely to the engine lifting points, typically located on the engine block. Double-check the hoist's capacity and ensure the lifting chains or straps are in good condition. Slowly lift the engine, carefully observing for any remaining connections or obstructions. Once the engine is clear of the chassis, carefully maneuver it to a safe location for service or replacement. Installation is essentially the reverse of the removal process, paying close attention to torquing all fasteners to the manufacturer's specifications and ensuring all connections are secure and properly sealed. After the engine is installed and all systems are reconnected, prime the fuel system, check fluid levels, and start the engine to verify proper operation. It is always recommended to run the tractor for a short period and check for leaks after installation to verify the quality of the work. Remember to follow the proper steps, and if necessary, consult with a qualified mechanic.
The transmission on the John Deere 2351 is a critical component responsible for transferring power from the engine to the wheels. Removing the transmission requires careful planning and adherence to safety procedures. Begin by disconnecting the battery and draining the transmission fluid into a suitable container. Support the tractor safely with jack stands placed under the axles, ensuring stability before proceeding. Remove the rear wheels to gain access to the transmission housing. Familiarize yourself with the various linkages, hydraulic lines, and electrical connections associated with the transmission system before attempting removal. A detailed understanding of the transmission's internal components is crucial for diagnosing any issues and ensuring a successful reinstallation.
Disconnect all external components connected to the transmission, including the driveshaft, PTO shaft, and any hydraulic lines. Label each line and connection for easy reassembly. Carefully disconnect the shift linkages and any electrical wiring associated with the transmission's control system. Inspect the mounting bolts and hardware for any signs of corrosion or damage. Apply penetrating oil to any stubborn bolts to facilitate removal. Position a suitable transmission jack under the transmission housing to support its weight during removal. Slowly lower the transmission, ensuring it clears any surrounding components. Once the transmission is completely free, carefully move it to a designated workspace for inspection or repair.
Installing the transmission involves reversing the removal process. Ensure the mating surfaces between the transmission and engine are clean and free of debris. Carefully align the transmission with the engine and secure it with the appropriate mounting bolts, torquing them to the manufacturer's specifications. Reconnect all linkages, hydraulic lines, and electrical connections, ensuring they are properly secured and routed. Refill the transmission with the recommended type and quantity of fluid. Reinstall the rear wheels and lower the tractor back onto the ground. Before putting the tractor back into service, test all transmission functions, including shifting, PTO operation, and hydraulic performance. Listen for any unusual noises or vibrations that may indicate a problem. Double check fluid levels after a short test drive to ensure correct fill levels.
The hydraulic system on the John Deere 2351 is essential for various functions, including lifting implements, steering, and operating auxiliary equipment. Before commencing any work on the hydraulic system, relieve the hydraulic pressure by lowering any raised implements and shutting off the engine. Disconnect the battery to prevent accidental activation of hydraulic components. Thoroughly clean the area around the component to be removed to prevent contaminants from entering the system. Gather all necessary tools, including wrenches, screwdrivers, and specialized hydraulic tools if required. A clean work environment is critical when working with hydraulic systems to prevent contamination and potential damage to sensitive components.
Identify the specific hydraulic component to be removed, such as a pump, valve, or cylinder. Disconnect all hydraulic lines connected to the component, carefully labeling each line to ensure proper reassembly. Use a suitable container to catch any hydraulic fluid that may spill during disconnection. Remove any mounting bolts or hardware securing the component to the tractor. Carefully maneuver the component out of its mounting location, taking care not to damage any surrounding parts. Inspect the removed component for signs of wear, damage, or leakage. Replace any worn or damaged components with genuine John Deere parts to ensure proper performance and reliability.
Installing a hydraulic component involves reversing the removal process. Ensure the mating surfaces are clean and free of debris. Install new seals or O-rings as needed to prevent leaks. Carefully align the component with its mounting location and secure it with the appropriate bolts, torquing them to the manufacturer's specifications. Reconnect all hydraulic lines, ensuring they are properly tightened and routed. Bleed any air from the hydraulic system by following the manufacturer's instructions. Check for leaks after installation and tighten any connections as needed. Before putting the tractor back into service, test all hydraulic functions to ensure proper operation. Check the hydraulic fluid level and add fluid as necessary to maintain the correct level. Routine maintenance and regular inspections are essential for ensuring the long-term reliability of the hydraulic system.
Proper engine torque is critical for the longevity and performance of your John Deere 2351 tractor. Incorrect torque can lead to premature wear, component failure, and even catastrophic engine damage. Always consult this manual or the engine manufacturer's specifications before tightening any engine component. It is highly recommended to use a calibrated torque wrench to ensure accurate readings and consistent results. Remember to apply a thin coat of clean engine oil to the threads of bolts before tightening, unless otherwise specified, to ensure accurate torque readings and prevent thread galling.
Specific torque values for crucial engine components such as cylinder head bolts, connecting rod bolts, crankshaft main bearing bolts, and flywheel bolts are listed below. Note that these values may vary slightly depending on the engine model and year. Always double-check the specific engine serial number against the provided charts. It is also important to follow the proper tightening sequence, especially for cylinder head bolts, to ensure even pressure distribution and prevent warping. A step-by-step guide is usually provided to complete tightening of the components
The transmission of your John Deere 2351 is a complex system responsible for transferring power from the engine to the wheels. Proper torque of transmission components is essential for smooth and reliable operation. Loose or overtightened bolts can lead to gear slippage, bearing failure, and ultimately, transmission failure. Always use the correct torque values and follow the recommended tightening sequence when working on the transmission.
Torque values for components such as the transmission case bolts, gear carrier bolts, and PTO shaft bolts are listed in the table below. Pay close attention to the thread size and grade of the bolts, as this will affect the required torque. When reassembling the transmission, use new gaskets and seals to prevent leaks. A calibrated torque wrench should always be used, and the torque should be verified after a short period of operation to ensure proper clamping force.
The hydraulic system is vital for the operation of many functions on the John Deere 2351, including the loader, hitch, and power steering. Maintaining the correct torque on hydraulic fittings and components is crucial for preventing leaks and ensuring optimal performance. Leaks can not only reduce efficiency but also create a safety hazard. Always use the specified torque values when tightening hydraulic fittings and hoses.
The torque values for hydraulic pump mounting bolts, valve body bolts, and hydraulic cylinder fittings are detailed below. When working with hydraulic components, make sure the system is depressurized before disconnecting any lines. Always use the correct size wrench to prevent rounding off the fittings. After completing any hydraulic repairs, check for leaks and bleed the system to remove any trapped air.
The chassis of your John Deere 2351 provides the structural integrity and support for all other components. Proper torque of chassis fasteners is critical for ensuring the stability and safety of the tractor. Loose or overtightened bolts can compromise the frame's strength and lead to dangerous situations. Therefore it is imperative to ensure the correct torque value is applied.
Torque specifications for components such as wheel bolts, axle bolts, and frame mounting bolts are listed in this section. Remember to tighten wheel bolts in a star pattern to ensure even distribution of force. Regularly inspect the chassis fasteners for tightness and corrosion. Replace any damaged or weakened bolts immediately. It is also essential to maintain a proper record of maintenance and repair of components. This will provide you with all the crucial information required for a reliable maintenance schedule
Maintaining your John Deere 2351 baler requires a solid understanding of not just the machine itself, but also the essential tools and equipment needed for proper diagnosis, repair, and preventative maintenance. Using the correct tools ensures that repairs are performed efficiently and safely, minimizing the risk of damage to the baler or injury to yourself. This chapter will cover a comprehensive overview of specialized tools, measuring instruments, and essential safety equipment necessary for effectively servicing your John Deere 2351 baler. By understanding and investing in the right equipment, you can significantly improve the longevity and performance of your baler, reducing costly downtime and maximizing productivity.
The John Deere 2351 baler, like most complex agricultural machinery, requires specific tools for particular tasks. For example, a specialized chain breaker and riveting tool is essential for properly servicing the baler's drive chains, ensuring they are correctly adjusted and free from wear. A hydraulic pressure gauge with the appropriate adapters is crucial for diagnosing issues within the baler's hydraulic system, allowing you to check pressures in various circuits and identify potential leaks or component failures. Some repairs will require a specialized bearing puller set, capable of safely and effectively removing bearings from shafts and housings without causing damage. Investing in these specialized tools will allow you to perform a wider range of repairs in-house, saving time and money on outsourcing to a mechanic.
Beyond these specific examples, consider the unique aspects of your baler and the most common repairs you anticipate. A good set of roll pin punches is essential for removing and installing roll pins throughout the machine, particularly in areas like the pickup head or knotter assembly. Torque wrenches, especially those calibrated for higher torque values, are critical for properly tightening bolts and fasteners to the manufacturer's specifications, preventing loosening and potential damage due to over-tightening. Finally, a set of crowfoot wrenches can be invaluable for accessing fasteners in tight spaces, such as around hydraulic lines or within the baler's frame structure. Remember to always consult the parts manual and service manual to identify tools that are specifically recommended for your model.
Accurate measurements are paramount when diagnosing and repairing agricultural equipment. A quality multimeter is indispensable for troubleshooting electrical issues within the John Deere 2351 baler, allowing you to test for voltage, continuity, and resistance in various circuits. A dial indicator with a magnetic base is essential for checking runout on shafts and rotors, ensuring proper alignment and preventing premature bearing wear. Calipers and micrometers are necessary for measuring the dimensions of various components, such as bearings, bushings, and shafts, to ensure they meet the manufacturer's specifications and haven't exceeded wear limits. Without accurate measurements, you risk misdiagnosing the problem or installing the wrong replacement parts.
Furthermore, consider investing in specialized gauges for specific applications. A feeler gauge set is essential for adjusting valve lash or PTO slip clutches as indicated in your service manual. An air pressure gauge with a regulated air nozzle can be used to test and clean orifices of the baler, and confirm air-assisted functions are being delivered per specifications. Precision scales are useful for correctly weighting components or measuring volumes, which can be useful in repairing hydraulics. Investing in quality measuring instruments and learning how to use them properly will significantly improve the accuracy and effectiveness of your maintenance and repair work.
Safety should always be your top priority when working on agricultural machinery. Eye protection, such as safety glasses or a face shield, is essential to protect your eyes from flying debris, chemicals, and other hazards. Hearing protection, such as earplugs or earmuffs, is crucial to prevent hearing damage from the loud noises often associated with operating and repairing machinery. Gloves are necessary to protect your hands from cuts, abrasions, and exposure to chemicals and hydraulic fluids. Beyond basic PPE, invest in durable and slip-resistant work boots to protect your feet and provide good traction on potentially slippery surfaces.
In addition to personal protective equipment, ensure you have other essential safety tools on hand. A fire extinguisher rated for Class ABC fires is crucial in case of electrical or fuel-related fires. A first-aid kit containing bandages, antiseptic wipes, and other essential supplies is necessary to treat minor injuries. Wheel chocks should be used to secure the baler when working underneath it, preventing accidental movement and potential injury. Always follow lockout/tagout procedures when performing maintenance or repairs that involve electrical or hydraulic systems, ensuring that the machine cannot be accidentally started while you are working on it. Remember that safety is not just a matter of equipment, but also of following proper procedures and maintaining a safe work environment.