9 John Deere 8770 Problems To Know About

john deere 8770 problems
john deere 8770 problems

Most farmers already know how much time harvesting and growing crops can take. Companies like John Deere manufacture vehicles that can be used during agricultural activities. These not only make the job easier but ensure that you can work efficiently.

The harvest that would normally take you several days or even weeks can be completed within days instead. The John Deere 8770 tractor is one of the most popular vehicles that many farmers already own. This comes with many features that ensure users can have a fun time.

Although, you should note that tons of complaints have also been received regarding this model. This is why we will use this article to provide you with a list of common problems you can get on the John Deere 8770 and ways to fix them.

Solutions For John Deere 8770 Problems

  1. Tire Problems

One of the most common problems that people report getting on the John Deere 8770 is with its tires. You should note that when it comes to a large vehicle like this, the tires on them play a huge role in how it will perform.

Tractors are mostly used for carrying large loads, which is another reason why the tires on these vehicles are so important.

Tire Pressure & Crossbar

Considering this, if you notice any issues with the tires, you should first deal with them. Usually, you can notice a decrease in performance and stability once the PSI rating on your tires starts to drop.

This indicates that you should get the wheels filled with air as soon as possible. Keeping the tires at the recommended levels of air when driving ensures that these last you a long time.

Sometimes people might notice that the tires start forming small cracks. The unique spiderweb design found usually means that you have been driving your tractor in high heat.

Alternatively, you might be using the vehicle in an area that contains toxic chemicals. Both can cause the tires on your tractor to start getting dry and forming cracks.

This is a result that causes air to lose out, which can be a huge problem. You should avoid this from happening, as no fix can be used if the cracks get too large.

The only thing that you can do then is get your tires replaced with new ones. Aside from this, you can also install a pressure-sensing monitor on your tractor’s wheels to check its pressure ratings.

  1. Steering Issues

Another common problem with the John Deere 8770 is that its steering starts to stiffen. This can be quite annoying, but you should note that this tractor model uses power steering. These are much easier to handle as they require less effort when turning.

Although, you should note that these steering wheels use a fluid that keeps the gears lubricated. If this thickens up, your steering will also get stiff. You should get the steering fluid replaced as soon as possible to fix your problem.

Steering Problem

Other than this, another reason for this issue can be that your hydraulic pump has gotten damaged. If this happens, then the only thing that you can do is replace it with a new one.

  1. Engine Problems

Finally, one more common problem with the John Deere 8770 tractor is its engine. This can sometimes start making sounds while you are driving it. If you notice this, you should stop your vehicle and check its engine.

Another similar issue that you can get is noticing a decrease in performance. Both of these problems mean that the coolant levels on your tractor have started going down.

Alternatively, the engine oil might require a replacement. You can fix the issue independently if you know how to fill these fluids in your tractor. However, if you are confused, you can take the vehicle to a nearby workshop instead.

  1. Low Oil Rating

The John Deere 8770 is a powerful and reliable tractor, but it can still experience problems. One issue that may arise with the John Deere 8770 is low oil ratings. Low oil ratings can seriously affect your tractor’s performance and lifespan if not properly addressed.

If you are experiencing this problem, there are several steps you can take to get your John Deere 8770 back in top shape.

Oil Pressure Problems

Begin with checking the engine oil level in the crankcase and make sure it meets manufacturer specifications. If the levels are too low or off-specification, you will need to add more engine oil as soon as possible.

Next, examine the fuel filter for any signs of contamination or clogging; if necessary, replace it with a new one to ensure proper lubrication of moving parts within your tractor’s engine system.

It is necessary to inspect all hoses connected to the cooling system and make sure they are free from cracks or leaks, which could be allowing coolant fluid to escape from its designated pathways and into other areas of your machine where it does not belong; replacing any damaged hoses should resolve this issue quickly.

  1. Starter Rotates Slowly

If you need help with your John Deere 8770 tractor, one of the most common problems is that the starter may rotate slowly.

Several factors, including low battery voltage or faulty wiring, can cause this. It’s important to diagnose and repair this issue quickly, as it can lead to other mechanical issues if not addressed properly.

  1. Faulty Solenoid

The solenoid sends an electric signal to the starter motor, causing it to rotate and turn the engine over. If the solenoid has failed or is not working properly, then the starter will not be able to spin as fast as it should.


To test if this is the cause of the issue, you can remove the solenoid and check that there is voltage being sent through it. If not, you must replace the solenoid before continuing with other repairs.

  1. Faulty Wiring

Another common cause of a slow-rotating starter in your John Deere 8770 tractor is faulty wiring. Over time, the wiring can become corroded or frayed, reducing its effectiveness and causing it to send a weaker signal to the starter.

If you suspect this is the cause of your problem, you should inspect all the wiring connections and replace any damaged or worn-out ones.

  1. Low Battery Voltage 

Finally, low battery voltage is another potential cause of a slow-rotating starter in your John Deere 8770 tractor. This can be caused by several things, including an old or worn-out battery or leaving the lights on for too long.

If you suspect this is the cause of your problem, you should replace the battery to ensure that you have enough voltage to operate the starter properly.

Check Starter Voltage

  1. Clutch Troubleshooting

Another common issue with the John Deere 8770 tractor is clutch issues. If you’re having difficulty shifting gears or the clutch seems to slip, it’s time to look under the hood.

Clutch problems can often be traced back to broken or worn parts, so it’s important to inspect the clutch and all related components to identify the source of the issue. Once you’ve identified the root cause, you can replace the faulty part or make any necessary repairs.

How to maintain the John Deere 8770 in good working condition?

Maintaining the John Deere 8770 in good working condition requires a keen eye and regular attention. Proper maintenance of this tractor model is key to getting the most out of its performance and longevity.

As part of a well-maintained John Deere 8770, regularly check the engine, drive train, hydraulics, brakes, steering, and lighting systems.

To keep the engine in proper running order, it’s important to regularly check the oil levels and integrity of the air filter.


It’s also wise to maintain cleanliness around the radiator and cooling system to prevent dust buildup that can cause overheating. The fuel injection system should also be checked for proper operation, and the fuel filter should be replaced regularly.

Proper lubrication of all moving parts is critical to keep the tractor running in top condition. The drive train components, including axles, transmission, differentials, and differential lockers, should be regularly checked for worn-out parts or leaks.

It’s also important to ensure that all the hydraulic components are in good working order. This includes checking the hoses, connections, and pumps for any signs of wear and tear.

The brakes should also be checked regularly to ensure they are working properly and that the tread on the tires is sufficient for safety.

The steering system should be regularly inspected for any issues or parts that need to be replaced.

Additionally, the lighting systems should be checked periodically to ensure they are properly illuminating the area and providing adequate visibility. A John Deere 8770 can provide reliable service for many years with regular maintenance.

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