The john deere 3520 is known to have problems with the front axle seals and the pto seal. The john deere 3520 is a reliable and popular tractor for small to mid-sized farms.

John Deere 3520 Problems

However, like any machine, it is not without its problems. One of the most common issues with the 3520 is a leaky front axle seal and pto seal. This can cause oil or hydraulic fluid to leak, leading to potential damage to the tractor and decreased performance.

Other issues that may arise with the 3520 include engine problems, electrical issues, and transmission problems. Fortunately, many of these problems can be resolved with routine maintenance and replacement of faulty parts. In this article, we will discuss some of the most common problems with the john deere 3520 and provide tips on how to diagnose, maintain, and repair them.

Common Issues And How To Fix Them

John deere 3520 is a versatile tractor used for a variety of tasks. While it is a reliable machine, like any other vehicle, it faces issues from time to time. In this post, we will discuss some common john deere 3520 problems and how to fix them.

Engine Problems: Causes And Solutions

The engine is the heart of a tractor, and if it is not functioning properly, it can lead to significant problems. Here are some of the common engine problems of john deere 3520:

  • Engine overheating: This can be due to low coolant levels, a malfunctioning thermostat, or clogged radiator. To fix this issue, check and refill the coolant levels, replace the thermostat, or clean the radiator.
  • Starting problems: If the engine is not starting or is hard to start, it can be due to a weak battery, clogged fuel filter, or faulty starter motor. The solution is to replace the battery, replace the fuel filter, or repair the starter motor.
  • Loss of power: If the engine is losing power, it could be due to a clogged air filter, malfunctioning turbocharger, or clogged fuel injectors. To fix this issue, replace the air filter, repair or replace the turbocharger, or clean the fuel injectors.

Hydraulic System Problems: Causes And Solutions

The hydraulic system is responsible for powering many of the john deere 3520’s functions, including the loader and backhoe. Here are some common hydraulic system problems and how to fix them:

  • Low hydraulic pressure: Low hydraulic pressure can be due to a clogged or damaged hydraulic pump or a malfunctioning relief valve. To fix this issue, replace the pump or valve.
  • Slow functions: If the loader or backhoe is moving slowly, it could be due to low hydraulic fluid levels, a clogged hydraulic filter, or a malfunctioning control valve. The solution is to refill the hydraulic fluid, replace the filter or repair the valve.
  • Leaking hydraulic fluid: Leaking hydraulic fluid can be due to a damaged hose, loose fittings, or a worn-out seal. To fix this issue, replace the hose, tighten the fittings or replace the seal.

Electrical Issues: Causes And Solutions

Electrical issues can cause significant problems in a tractor, including starting problems and failures of electronic systems. Here are some common electrical issues and how to fix them:

  • Dead battery: A dead battery can be due to old age, a faulty alternator, or parasitic drain. Replace the battery, repair or replace the alternator or disconnect any devices that could cause parasitic drain.
  • Blown fuses: A blown fuse can be due to a short circuit or overload. Fix the short circuit, reduce the load or replace the fuse.
  • Malfunctioning gauges: Malfunctioning gauges could be due to a faulty sensor or broken wire. Replace the sensor or repair the wire.

While there may be other issues that can arise with john deere 3520 tractors, these are some of the most common ones and how to fix them. By regularly maintaining and checking your tractor, you can prevent these problems and keep your john deere 3520 running smoothly.

Maintenance Tips To Prevent Common Problems

John deere 3520 is a popular tractor model known for its reliability and durability. However, like any other heavy machinery, it’s not immune to wear and tear, which can lead to costly repairs. To prevent these common issues, it’s crucial to follow a proper maintenance schedule and routine procedures.

In this section, we’ll provide you with some useful tips to keep your john deere 3520 in top shape.

Recommended Maintenance Schedule

To ensure your john deere 3520 works efficiently and lasts longer, it’s essential to follow the recommended maintenance schedule. Here are the key points you should remember:

  • Check the engine oil level every 50 hours of use or every month, whichever comes first.
  • Replace the engine oil and filter every 200 hours of use or annually.
  • Change the fuel filter and drain water separator every 500 hours of use or annually.
  • Inspect the air cleaner filter for dirt and debris every 100 hours of use or annually, whichever comes first. Clean or replace it as necessary.
  • Check the transmission fluid level every 150 hours of use or annually.
  • Change the hydraulic oil and filter every 1200 hours of use or every three years, whichever comes first.

Routine Maintenance Procedures

Apart from the recommended maintenance schedule, here are some routine maintenance procedures that you should follow to prevent common problems:

  • Keep the tractor clean and free from dirt and debris.
  • Lubricate all the grease fittings every 50 hours of use or annually.
  • Inspect and adjust the drive belt tension regularly.
  • Check the battery terminals for tightness and corrosion every 50 hours of use or annually.
  • Inspect the tires for damage, wear and tear, and proper inflation.

By following these tips, you can prevent common problems with your john deere 3520 and keep it running like new. Always remember that prevention is better than cure, and proper maintenance is the key to a long-lasting tractor.

Cost-Effective Solutions

John deere 3520 tractors are a popular choice for farmers and homeowners. While these tractors are built to last, they can run into problems like any other machinery. However, not all problems require the help of a professional mechanic. In this section, we will explore cost-effective solutions to common john deere 3520 problems that you can do yourself.

Troubleshooting Steps

Before calling for professional help, there are some basic troubleshooting steps you can take to try and solve the problem yourself.

  • Check the battery and connections to ensure they are clean and secure.
  • Look for visible leaks or damage to hoses and belts.
  • Inspect the air filter to ensure it is not clogged with dirt or debris.
  • Check fuel lines and filters to ensure they are clear and free of debris.
  • Look for visual damage to the tractor’s wiring and connections.

Diy Repairs

Minor issues with your john deere 3520 can often be fixed with some simple diy repairs. Here are some examples:

  • Change the engine oil and filter at regular intervals to ensure the engine runs smoothly.
  • Replace spark plugs to ensure proper ignition and fuel efficiency.
  • Inspect and replace damaged belts and hoses when necessary.
  • Keep the tractor clean and lubricated to reduce wear and tear on moving parts.
  • Tires should be checked regularly for proper inflation and replaced when the tread wears down.

Professional Repair Services

For more significant issues, it may be necessary to bring in a professional. Fortunately, there are still some cost-effective solutions:

  • Look for local independent mechanics who specialize in repairing john deere tractors to save money on dealer repair costs.
  • Check your warranty or extended warranty to see if the repairs are covered.
  • Ask your dealer about any available financing options or payment plans to make repairs more affordable.

Many john deere 3520 problems can be quickly resolved with simple diy repairs or by following basic troubleshooting steps. However, for more significant issues, it’s essential to bring in a professional mechanic to save you time and money in the long run.

Frequently Asked Questions

What Are The Common Issues Of John Deere 3520?

The most common problems reported in john deere 3520 are transmission issues, hydraulic problems, bearings wear out, engine overheating, and failures in electrical components.

How To Fix John Deere 3520’S Engine Overheating?

Check and replace the coolant, inspect the thermostat for defects, clean or replace the radiator, and ensure that there are no obstructions in the airflow.

What Causes John Deere 3520’S Hydraulic System Failure?

The hydraulic system may fail due to dirt and debris buildup, incorrect fluid levels, contaminated hydraulic fluid, and worn-out hydraulic pump components.

How To Diagnose John Deere 3520’S Transmission Problems?

Check the transmission fluid level and quality, look for any leaks, inspect the filter and perform a diagnostic test with specialized equipment.

How To Maintain John Deere 3520 To Avoid Problems?

Schedule regular maintenance, keep the tractor clean, follow the manufacturer’s guidelines for fluid and filter checks and replacement, and store the tractor in a dry and safe place.


After delving into the various issues that john deere 3520 owners face, one thing becomes apparent: while this tractor has its shortcomings, it’s still a valuable addition to any farming operation. While some problems, such as the clutch or transmission issues, can be frustrating, they’re not necessarily deal-breakers.

With the right care and maintenance, you can address these issues and keep your 3520 running smoothly for years to come. Plus, the tractor’s long list of features and impressive specs are hard to ignore. If you’re looking for a versatile piece of machinery that can handle a wide range of tasks, the john deere 3520 is worth considering.

It may not be perfect, but it’s certainly a workhorse that can provide valuable benefits to your farming operation.

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