John Deere 3520 Problems: Common Hitches & Fixes

Common John Deere 3520 issues include transmission problems and electrical faults. Users also report trouble with the hydrostatic pedals.

John Deere 3520 tractors are workhorses known for their reliability and versatility in agricultural tasks. Despite their robust design, owners occasionally face various operational challenges. From transmission hiccups to delicate electrical systems, these issues can hinder the machine’s performance, impacting farming efficiency.

Maintenance plays a crucial role in preventing and addressing these problems swiftly, ensuring that the tractor operates at its full potential. As with any piece of complex machinery, understanding these potential faults helps owners prepare for quick fixes and reduces downtime, keeping productivity on track. With proper care and attention to common problem signs, the John Deere 3520 remains an invaluable asset to farmers worldwide.

John Deere 3520 Troubleshooting

Owners of the robust John Deere 3520 tractor know its value in heavy-duty work. Like any machine, it can face issues affecting performance. Recognizing and solving these problems keeps this trusty tractor running smoothly.

Identifying Common Issues

Knowing the signs of trouble can prevent bigger problems. Here are key issues to watch for:

  • Engine problems: Look for difficulty starting, power loss, or unusual noises.
  • Hydraulic issues: Check for leaks, weak operation, or failing attachments.
  • Electrical faults: Non-starting, dim lights, and dead batteries are red flags.
  • PTO complications: Trouble engaging or inconsistent operation can occur.

The Importance Of Regular Maintenance

Regular checks ensure your John Deere 3520 stays in top condition. Follow these simple steps:

  1. Oil and filter changes: Keep your engine clean and lubricated.
  2. Fluid levels check: Maintain proper levels for optimal operation.
  3. Tire inspection: Prevent wear and tear with routine checks.
  4. Air filter maintenance: Clean air filters support engine health.

Engine Struggles And Solutions

John Deere 3520 owners often tackle engine troubles. It can be frustrating. Quick fixes and preventive steps can help. This guide lists common issues and solutions. Read on for tips to get your tractor running smoothly.

Starting Difficulties

Does your John Deere 3520 hesitate to start? Look at these areas:

  • Battery: Ensure it’s charged and terminals are clean.
  • Starter: Might need replacement if it’s faulty.
  • Fuel system: Check for clogs or needed filter changes.

If these don’t fix the problem, a professional mechanic can help.

Lack Of Power

Power loss in your tractor is no small issue. Here are steps to solve it:

  • Air intake: A blocked filter can cut power. Replace if needed.
  • Fuel quality: Use clean, high-grade diesel.
  • Engine tuning: Incorrect settings can reduce efficiency. Get it tuned.

Regular maintenance is crucial. Follow the John Deere servicing schedule for optimal performance.

Transmission Troubles

Even the sturdy John Deere 3520 might face transmission issues. Knowing these problems could save you from a day stuck in the field. Let’s dig into common transmission troubles, from shifting woes to fluid leaks, and how you can tackle them.

Gear Shifting Challenges

If your John Deere 3520’s gear won’t shift smoothly, it’s time for a checkup. Muddy conditions or lack of use can both lead to trouble. Here’s a quick look at what could be causing the issue:

  • Clutch alignment issues may prevent smooth transitions between gears.
  • Worn-out synchronizers can make shifting gears difficult.
  • Linkage adjustments might be needed for proper gear engagement.

Careful maintenance helps prevent these challenges. Check your tractor’s manual for specific upkeep tasks.

Transmission Fluid Leaks

Transmission fluid leaks spell trouble for your John Deere 3520. The tractor relies on this fluid for smooth operation. Look out for pools of oil underneath the tractor.

Possible Causes Signs to Watch For DIY Solutions
Seal wear and tear Oil spots on the ground Tighten bolts or replace seals
Overfilled transmission Overflow from the breather cap Check fluid levels regularly
Damaged components Visible damage or oil trail Inspect and replace parts as needed

Prevent leaks by regularly checking the transmission fluid level. Change it according to the schedule in your tractor’s manual.

Hydraulics System Glitches

The robust workhorse that is the John Deere 3520 sometimes faces challenges with its hydraulics system. Such glitches can hinder performance, leading to downtime and frustration. This section dives into the common hydraulics issues owners might experience.

Weak Hydraulics Performance

Weak hydraulics in a John Deere 3520 can spell trouble for efficient operation. Signs include sluggish lifts or attachments that move slowly. Check these parts first:

  • Hydraulic fluid levels: Low levels cause poor performance.
  • Filters: Dirty filters restrict flow.
  • Pump problems: Wear and tear reduce efficiency.

Regular checks prevent these issues. Always use recommended fluid types and replace filters as advised.

Leaky Hydraulic Hoses

Hydraulic leaks pose a serious issue. They can lead to reduced power and potential hazards. Inspect hoses regularly for:

  • Visible damage: Cracks or wear in the hose.
  • Wet spots: Point to leaks.
  • Loose fittings: Can cause drips.

Fix leaks immediately. Always use proper John Deere parts for replacement. This maintains system integrity and safety.

Check Item Action
Fluid Level Top up if low
Filters Clean or replace
Hoses Inspect and replace if damaged

Electrical Woes

Owners of the John Deere 3520 tractor know it for its strength and reliability. But some face challenges with its electrical system. Problems here can stop work in its tracks. Let’s explore common electrical issues and ways to solve them for this popular tractor.

Battery Draining Issues

A battery keeps your tractor alive, but what if it drains too quickly? A frequent issue users of the John Deere 3520 face is the battery losing charge, even when the tractor is off. What might cause this? A short circuit, an old battery, or a fault in the charging system can all be culprits. Here’s a list of checks and tips:

  • Test the battery with a voltmeter.
  • Clean terminals for a good connection.
  • Inspect the alternator and its belt.
  • Seek a professional for electrical diagnostics.

Frequent Light Failures

Lights are vital for early morning or late night work. But, they can fail often in the 3520 model. Vibration from the tractor’s movement can loosen the bulbs or damage connections. Corrosion from the elements can interrupt the circuit. To keep your path lit, try the following:

  1. Ensure bulbs are securely fitted.
  2. Use dielectric grease to prevent corrosion.
  3. Regularly check wire connections.
  4. Replace any worn out wiring harnesses.

Pto Complications

Owners of the John Deere 3520 tractor might face challenges with the Power Take-Off (PTO) system. This critical component transfers power from the tractor to the attached implement. Troubleshooting PTO issues can restore vital functionality for your farm equipment tasks. Let’s explore common PTO complications and get your tractor running smoothly again.

Pto Won’t Engage

The PTO is crucial for farm implements. When it won’t engage, check these points:

  • Safety switches: Ensure they are functioning.
  • PTO lever: It should move smoothly.
  • Fuses and relays: Replace if burnt out.
  • PTO clutch: A worn clutch needs replacement.

Excessive Vibration During Operation

Vibrations in the PTO can indicate issues:

Cause Solution
Imbalance in PTO shaft Rebalance or replace the shaft
Worn out bearings Inspect and replace bearings
Damaged equipment Check for damaged parts and repair

Fuel System Frustrations

Fuel System Frustrations often strike owners of the John Deere 3520 tractor. These issues can hinder its performance. In this part of our blog, we’ll look at some typical fuel system headaches faced by tractor owners. By understanding these problems, you can take steps to keep your tractor running smoothly.

Clogged Fuel Filters

A clogged fuel filter is a common issue for the John Deere 3520. It prevents fuel from flowing freely to the engine. Signs of this problem include:

  • Engine sputtering
  • Decreased power
  • Difficulty starting
Maintenance Task Frequency
Check fuel filter Every 100 hours
Replace fuel filter As needed

Regular maintenance can prevent clogs. Replace filters as part of routine service. Doing so ensures a steady flow of clean fuel to your engine.

Inconsistent Fuel Supply

Another issue is an inconsistent fuel supply, which can be puzzling. It may be caused by:

  1. Air in the fuel system
  2. Damaged fuel lines
  3. Malfunctioning fuel pump

Regular inspection of fuel lines and the pump is crucial. Ensure all connections are secure and free of damage. Signs of inconsistent fuel supply include erratic engine performance and unexpected stalling, indicating that something is amiss with the fuel delivery.

Cooling System Concerns

The John Deere 3520 tractor is known for its robustness and efficiency. Like any machine, it can experience issues. A common area of concern is the cooling system. It’s crucial for preventing engine damage. In this section, we’ll address two prevalent cooling system problems: overheating episodes and coolant leaks.

Overheating Episodes

An overheating engine is a serious issue. It leads to major engine problems. Regular maintenance can prevent this. Look for signs like:

  • High temperature readings on the gauge
  • Steam coming from the engine
  • Decreased engine performance

Common causes of overheating include:

  1. Dirt and debris in the radiator
  2. Faulty thermostat
  3. Broken water pump

Regular checks can keep the engine cool. Clean the radiator often. Replace the thermostat if needed.

Coolant Leaks

Coolant is key in heat regulation. Leaks can drop fluid levels. Look for puddles under the tractor. Check hoses and the radiator for damage. Seal any leaks immediately. Consistent coolant levels are vital for: Optimal engine temperatures Preventing overheating

Coolant System Checkpoints
Area to Inspect Action to Take
Radiator Cap Ensure a tight seal
Hoses Look for cracks or wear
Reservoir Tank Check for proper fluid levels

Address cooling system concerns promptly. It extends your tractor’s life. Proper care keeps it running smoothly.

Steering System Hitches

The John Deere 3520 tractor remains a workhorse in agriculture. Yet, some owners face hitches in its steering system. It’s crucial to address these issues promptly. Proper maintenance helps in keeping the tractor running smoothly. Steering system hitches can turn simple tasks into big challenges. Let’s dive into common steering problems and how to fix them.

Difficult Steering Wheel Movement

Turning the steering wheel shouldn’t feel like a workout. If it’s hard to turn, something is off. Some possible reasons could be:

  • Seized joints or bearings in the steering column.
  • Incorrect tire pressure affecting maneuverability.
  • Worn out steering components needing replacement.

Regular grease application eases steering motion. Tire pressure should match the manufacturer’s specifications. Don’t ignore unusual stiffness in the steering wheel. A quick check can prevent bigger issues.

Power Steering Fluid Issues

The power steering system depends on its fluid to function. Signs of fluid problems include:

Symptom Possible Cause Action
Squealing noises. Low fluid level. Top up the fluid.
Jerky or unresponsive steering. Contaminated fluid. Flush and replace the fluid.

Check the power steering fluid regularly. Look for signs of leaks beneath the tractor. A fluid refill might solve the problem. If the issue persists, seek professional help to avoid damage.

Brake System Defects

Owners of the John Deere 3520 often report concerns about its brake system. This reliable tractor model sometimes faces issues that can affect its braking performance. Understanding these problems helps in prompt diagnosis and repair.

Brake Failure

Brake failure in the John Deere 3520 can pose serious safety risks. Key signs include the tractor not stopping when the brake pedal is pressed or a noticeable delay in brake engagement. Below are common causes for brake failure:

  • Low brake fluid levels can lead to loss of braking power.
  • Air in the brake lines may prevent fluid from effectively transmitting pressure.
  • Worn-out brake pads or shoes reduce stopping efficiency.
  • Damage to hydraulic components can result in brake failure.

Squealing Brakes

The sounds of squealing brakes are hard to miss on a John Deere 3520. This noise often indicates the need for maintenance. Here’s what might be causing it:

  • Dirt or debris on the brake parts can cause squealing.
  • Worn-down brake pads often make a high-pitched sound.
  • Brakes could be overheating from excessive use.
  • Loose parts or hardware may vibrate and cause noise during operation.

Tire And Wheel Malfunctions

Tire and wheel issues can lead to unsettling rides and costly damage. Users of the John Deere 3520 tractor often face several problems related to tires and wheels. These problems can affect performance and safety. Recognizing and addressing these issues early is vital for maintaining the tractor’s condition.

Uneven Tire Wear

Uneven tire wear is a common issue with the John Deere 3520. Several factors can cause this:

  • Incorrect tire pressure
  • Improper loading of equipment
  • Alignment issues

Regular tire inspections can prevent uneven tire wear. Users should check tire pressure often with an accurate gauge. Correct tire pressure ensures a smoother ride. It reduces the risk of premature tire replacement.

Wheel Alignment Problems

Wheel alignment is critical for stability. Misaligned wheels can lead to uneven tire wear and poor handling. The John Deere 3520 might show signs like:

  • Drifting to one side
  • Vibrations in the steering wheel
  • Uneven tire treads

Tractors need occasional alignment checks. A proper wheel alignment will extend tire life and improve tractor control. It is best to consult a professional for any alignment adjustments.

Cab Comfort Concerns

Cab Comfort Concerns can turn a day’s work into a test of endurance. The John Deere 3520 is a powerhouse, but even the best machinery can stumble when it comes to operator comfort. Let’s dive into two frequent cab issues that might affect productivity and enjoyment during those long hours in the field.

Air Conditioning Faults

Staying cool is crucial, especially during harvest. An air conditioning system that fails to beat the heat can be more than uncomfortable. It’s often a deal-breaker. Some John Deere 3520 users report that their A/C systems are not consistent, blowing warm air when cool relief is needed. This inconsistency may be due to several factors:

  • Low refrigerant levels: might need a top-up or a leak fix.
  • Clogged filters: reduce airflow, decrease efficiency.
  • Faulty compressors: essential for system effectiveness.

Regular checks and maintenance can prevent these air conditioning faults. A well-functioning A/C keeps you cool, alert, and focused on the job.

Seat Adjustment Issues

A comfortable seat is a necessity for long hours of operation. The John Deere 3520 may have seats that present adjustment challenges. Some operators experience:

  1. Limited adjustability: restricts ideal positioning.
  2. Worn seat mechanisms: cause support and comfort loss.
  3. Difficult controls: hinder finding the right seating angle.

Proper seat function ensures the operator’s comfort and reduces the risk of fatigue. Regular inspections and prompt repairs ensure your seating is ready to support you throughout the day.

Attachment And Implement Problems

John Deere 3520 tractors are known for their strength and reliability. Yet, sometimes owners face issues with attachments and implements. These problems can affect your work. Understanding these issues helps you fix them fast.

Attachment Fitting Difficulties

Attaching tools to your tractor should be easy! But sometimes, fitting problems arise:

  • Pins not aligning can make attachment hard.
  • Tight couplers can be tough to connect.
  • Mismatched attachments won’t fit right.

Always check the manual. Make sure you have the correct attachment for your 3520 model.

Implement Control Troubles

Controlling implements should be smooth. But sometimes, you might face issues:

Problem Cause Solution
Hydraulic failure Low fluid or leaks Check levels, fix leaks
Unresponsive controls Electrical fault Inspect wiring
Uneven operation Imbalanced load Redistribute weight

Detailed troubleshooting is in the operator’s manual. Perform regular maintenance to prevent these issues.

Diagnostic Tools And Tips

Encountering issues with your John Deere 3520 is inevitable. Proper tools and know-how keep your tractor running smoothly. This section provides insights into diagnostic resources. Examine common signs and apply troubleshooting techniques with ease.

Using Onboard Diagnostics

Modern tractors, like the John Deere 3520, come equipped with an onboard diagnostics system. This system is your first stop in understanding and resolving issues. Below, find steps to navigate the onboard diagnostics:

  1. Start by locating the diagnostic port, typically beneath the dashboard.
  2. Power up the system by turning the ignition key to the ‘on’ position.
  3. Observe the display panel for error codes and warnings.
  4. Reference your operator’s manual for code definitions.
  5. Perform the recommended corrective actions per the manual.

This system identifies a range of issues, from engine faults to electrical problems, helping you tackle minor fixes without delay.

When To Consult A Professional

Some technical difficulties require expert attention. Recognize scenarios demanding professional expertise:

  • Inconsistent engine performance
  • Hydraulic system malfunctions
  • Complex electrical faults

Contact a certified John Deere technician if the onboard diagnostics display critical issues, or if self-troubleshooting does not resolve the problem. They bring specialized tools and extensive knowledge, ensuring your tractor’s health and longevity.

Remember, timely intervention can save you from lengthier, costlier repairs down the line.

Preventative Measures For Longevity

Maintaining a John Deere 3520 tractor means understanding its needs before issues arise. These tractors are built tough, but durability depends on regular attention. The goal is straightforward – keep your machine running smoothly for years. Insights on preventative measures to enhance the longevity of your vehicle will follow.

Implementing A Maintenance Schedule

Consistent upkeep is key. A schedule helps prevent problems before they start. Below is a simple guide:

  • Check oil levels every 50 hours of use.
  • Replace filters and engine oil every 200 hours.
  • Inspect hydraulics, brakes, and coolant system bi-annually.

Refer to the owner’s manual for more specific tasks.

Upgrade Options For Reliability

To boost performance and dependability, consider these upgrades:

Upgrade Benefit
High-quality filters Improves engine health
Synthetic oils Enhances lubrication
LED lighting Increases visibility

Upgrades ensure your machine operates at its best.

Frequently Asked Questions For John Deere 3520 Problems

What Common Issues Plague John Deere 3520?

John Deere 3520 models often face problems like transmission issues, electrical faults, and PTO malfunctions. Owners sometimes struggle with engine troubles, such as starting difficulties or power loss. Regular maintenance can mitigate some of these issues.

How To Troubleshoot 3520 Hydraulic Problems?

Troubleshooting hydraulic problems in a John Deere 3520 usually begins with checking fluid levels and looking for leaks. Ensuring connectors are tight and filters are clean is also important. For persistent issues, consulting the manual or a professional is advised.

Are There Recalls For John Deere 3520 Tractors?

As of my knowledge cutoff in 2023, there are no widespread recalls for the John Deere 3520. However, owners should regularly check with John Deere or authorized dealers for any updates regarding their specific tractor model.

Can Software Updates Fix 3520 Electrical Issues?

Software updates can resolve certain electrical issues in John Deere 3520 tractors. These updates optimise performance and can be installed by dealers. Always ensure your tractor’s software is current for best operation.


Navigating through the quirks of the John Deere 3520 can be daunting. Yet, understanding common issues paves the way for timely solutions. Remember, regular maintenance is your best safeguard against unforeseen downtime and costly repairs. Embrace the robustness of your machine and tackle any challenges head-on to keep your John Deere 3520 running smoothly for years to come.

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