Kubota M5-111 Problems

If you’re thinking about buying a Kubota M5-111 tractor, there are a few things you should know. 

In this blog post, we’ll cover some of the most common problems with this model tractor and what you can do to avoid them. 

Keep reading to learn more!

Kubota M5-111 Issues

1. DEF Problem

DEF is a mixture of deionized water and urea used in modern diesel engines to reduce air pollution. It is critical to a diesel engine as it improves your engine’s fuel efficiency. 

In addition, it ensures your engine’s safety and increases its power.

If you are experiencing problems with your Kubota M5-111 tractor, one possible issue could be that the DEF tank is running low. 

When the DEF tank runs low, the tractor’s power will drop significantly. 

If the problem is not addressed, the tractor may eventually stop working altogether.

Be sure to keep an eye on the DEF level and refill when necessary. It is also important to make sure you are using high-quality DEF fluid from a reputable dealer.

2. Sensor Problems

The Kubota M5-111 tractor has a DEF sensor system that alerts the user of any alarming situation. 

However, many users have complained about the faulty sensors in this tractor. This may be due to damage or improper functioning of the sensors. 

If the sensors are not working properly, it can be very dangerous and may even cause an accident.

The owner manual for the Kubota M5-111 tractor should be consulted to locate the sensors. 

If they are found to be damaged, the entire system may need to be replaced. 

This may be costly, but it is important to ensure your safety. It is also advised to check if the tractor is still in the warranty period as you may be able to get it replaced at a lower cost.

3. Engine Lacks Power

If your Kubota M5-111 engine is having trouble getting up to speed, there are a few things you can do to troubleshoot the issue. 

One of the most common problems is a dirty or clogged muffler. 

If this is the case, the engine will not be able to breathe properly and will lack power. To fix the problem you should clean the muffler and if clogged then you need to replace it. 

Another potential issue could be a faulty fuel supply pump or engine control common rail relief valve. 

If the engine is under excessive load, it may also struggle to perform properly.  So, remove the extra load if possible. 

Lastly, check the air filter to make sure it’s clean and not restricting airflow.

4. Loose Steering Wheel

The Kubota tractor steering can be loose for a few reasons. One possibility is that the oil is too low, so the tractor will need to be topped up. 

Another reason may be that there is a malfunction with the steering hydraulic cylinder, which will need to be repaired. 

If the pump steering broke, it will also need to be repaired. 

In any case, it is best to consult with a Kubota tractor dealer or technician to properly diagnose the issue.

5. The Motor Won’t Start

There can be various reasons why a Kubota M5-111 motor does not start. One of the most common reasons is a bad starter. 

If the starter turns bad, it will need to be diagnosed and reinstalled if necessary. 

Another common reason is a restriction in a fuel pipe. In this case, you should make washing and cleaning. 

If the fuel filter is dirty, it will need to be replaced. Worn piston rings are the last possible reason for this issue. 

In this case, the piston rings will need to be changed.

6. Steering not Working

There are a few reasons why your Kubota M5-111 tractor steering might not be working. One possibility is that the minimum oil has not been met, which could cause the steering pump to malfunction. 

Another possibility is that the steering pump has broken, in which case it would need to be repaired or replaced. 

Another potential issue could be a leak in the hydraulic connections, which would need to be eliminated before the tractor’s steering could be fixed. 

Finally, there could be a defect with the power steering pump, in which case it would need to be repaired. 

If you are having difficulty steering your tractor, it is important to have it diagnosed by a qualified Kubota dealer or service technician in order to determine the cause of the problem and get it fixed as soon as possible. 

7. Engine Overheats

The Kubota M5-111 engine is a popular tractor engine. However, it is prone to overheating if not properly cooled. 

One of the main causes of this overheating is a lack of airflow. This can be due to debris or dust particles blocking the radiator’s fins. If this happens, the heat will build up and the engine will overheat.

One way to prevent this from happening is to clear out any debris or dust from the radiator’s fins. 

This can easily be done by blowing out dirt with an air compressor. 

By doing this, you can ensure that the radiator has proper airflow and that the engine does not overheat.

What Customers Say About Kubota M5-111 Tractor?

Overall, reviewers say that the Kubota M5-111 tractor is a great machine that is well worth the price. 

It is comfortable to operate, has plenty of power, and is very versatile. 

Many owners also appreciate the high quality of construction and attention to detail that Kubota put into this tractor. 

There are a few complaints about the transmission, but overall users are very happy with their M5-111 tractors.

Here are some reviews from a few of them:

“I’ve had my Kubota M5-111 tractor for about a year now and I absolutely love it! It’s been incredibly reliable and has helped me get a lot of work done around the farm. I would highly recommend it to anyone in the market for a new tractor.” – Josh H., farmer

“I’m very happy with my Kubota M5-111 tractor. It’s been very reliable and has plenty of power for everything I need to do. The cab is also very comfortable, which is important to me since I spend a lot of time in it.” – Bob D., rancher


The Kubota M5-111 tractor has a variety of problems that have been noted by users. 

The majority of these problems seem to be related to poor quality control during manufacturing, and many owners have had to take their tractors back to the dealer for repairs. 

Overall, the Kubota M5-111 tractor is a decent machine, but it does have its share of issues that owners should be aware of.

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