10 Common Kubota M108S Problems You Need to Know

Kubota m108s problems include overheating and difficulty starting. The kubota m108s is a powerful agricultural tractor used for a variety of tasks, from plowing fields to mowing grass.

Despite its reputation for quality, however, the m108s is not immune to problems. One common issue is overheating, which can occur due to a variety of causes, including a malfunctioning radiator or fan. Additionally, some users have reported difficulty starting the tractor, which can sometimes be attributed to a dead battery or faulty starter.

In this article, we’ll take a closer look at these and other potential problems that m108s owners may encounter, as well as ways to troubleshoot and fix them. Whether you’re a seasoned farmer or a first-time tractor owner, it’s essential to stay knowledgeable about your equipment to ensure it runs effectively and efficiently.

Problem 1: Engine Overheating

Description Of The Issue And Its Possible Causes

Kubota m108s is a tractor with great capabilities. However, engine overheating is a common problem farmers face when using it. The engine’s heat increases beyond its designated limits, which can lead to serious damages if left unattended. There are a few causes of engine overheating, including:

  • Low coolant levels in the radiator
  • Malfunctioning thermostat or water pump
  • A damaged radiator fan
  • Clogged or dirty air filters
  • A torn or worn out radiator hose

These are some potential causes of engine overheating that you should consider, as they can lead to severe damage if left unchecked.

How To Identify Engine Overheating

It’s important to identify when the engine is overheating to prevent further damage. Here are a few signs that might indicate engine overheating:

  • A warning light on the dashboard
  • High temperature gauge reading
  • Foul smell coming from the engine
  • Decreased engine performance
  • Hissing noise from the engine

If you notice any of these signs, you should immediately turn off the engine and wait for it to cool down. Do not attempt to open the radiator cap, as hot coolant can cause serious burns.

Tips For Preventing Engine Overheating And Timely Solutions

Preventive measures can help avoid engine overheating. Here are a few tips to keep your kubota m108s engine in good shape:

  • Regularly check the coolant levels in the radiator, and top it up as necessary
  • Replace the thermostat and water pump at the intervals recommended by the manufacturer
  • Keep the radiator fan clean and functioning correctly
  • Regularly clean or replace the air filters to ensure that air flows smoothly into the engine
  • Inspect the radiator hoses for any damage or wear

If you notice any engine overheating signs, here are a few practical solutions to help prevent damage:

  • Turn off the engine and let it cool down
  • Check and top up the coolant levels in the radiator, if needed
  • Check the radiator hoses for any damages or wear and replace them if necessary
  • If the problem persists, contact a professional mechanic for assistance.

By following these tips, you can prevent engine overheating, save on repair costs, and keep your kubota m108s engine functioning correctly.

Problem 2: Hydraulic System Failure

Kubota M108S Problems: Hydraulic System Failure

Kubota m108s tractors are reliable machines used by farmers worldwide. However, the hydraulic system failure is a common problem that could cause serious problems in your tractor. In this section, we will explore the causes and symptoms of hydraulic system failure and offer solutions to fix the issue.

Causes Of Hydraulic System Failure In Kubota M108S Tractors:

  • Lack of maintenance: Regular maintenance of hydraulic systems is necessary to prevent failure. Over time, dirt, debris and moisture can cause damage to the hydraulic system.
  • Leaks in the hydraulic system: Hydraulic hoses, fittings and sealings are prone to wear out and develop leaks. Dirty or contaminated hydraulic fluid could also cause leaks.
  • Wrong hydraulic fluid: Using the wrong hydraulic fluid can also lead to system failure, as it could cause seals to swell or break.

Symptoms Of Hydraulic System Failure:

  • Slow operation: This is a common symptom of hydraulic system failure, which means that the hydraulic system is not delivering the required pressure to operate the machinery properly.
  • Noisy hydraulic pump: The pump may make high-pitched whining or grinding sounds when it starts to fail.
  • Fluid leaks: Leaking fluid is often easy to spot and is a common symptom of a hydraulic system failure. It could occur at the hoses and fittings or around the pump or valves.

Solutions To Fix The Issue:

  • Check hydraulic fluid regularly: Make sure to check your hydraulic fluid at least once a week and change it according to your tractor’s manual.
  • Repair hydraulic leaks: Regularly check all hoses, fittings, and sealings for leaks and replace the damaged parts.
  • Use the right hydraulic fluid: Always use the recommended hydraulic fluid specified in your kubota m108s’s manual.

To conclude, hydraulic system failure can cause significant damage to your kubota m108s tractor. Regular maintenance, checking for leaks, and using the right hydraulic fluid are critical to preventing such an issue. With proper care, your kubota m108s tractor will continue to operate efficiently.

Problem 3: Acceleration And Power Loss

Description Of The Issue And Its Possible Causes

Kubota m108s tractors are known for their exceptional acceleration and power, but sometimes they don’t seem to function as they should. One of the most common problems that kubota m108s tractors face is acceleration and power loss.

The possible causes of this issue are:

  • Dirty or clogged air filters
  • Faulty fuel injectors
  • Faulty fuel pump
  • Worn out or damaged clutch
  • Blocked fuel lines

How To Identify Acceleration And Power Loss In Kubota M108S Tractors

It could be challenging for inexperienced riders to notice acceleration and power loss issues in kubota m108s tractors, but there are a few key signs to look out for:

  • Reduced tractor speed
  • Tractor stalling or bogging down
  • Loss of power while climbing hills
  • Increased fuel consumption
  • A drop in engine rpm

Tips For Correcting Acceleration And Power Loss Issues

Here are some tips to help you correct the acceleration and power loss problem in your kubota m108s tractor:

  • Regular maintenance of air filters to keep them clean
  • Replacement of fuel injectors if they are faulty
  • Replacement of the fuel pump if it is malfunctioning
  • Replacement of the clutch if it is worn out or damaged
  • Cleaning of the fuel lines to remove any blockages

Additional tips to keep your tractor in optimal condition include:

  • Always use clean and high-quality fuel
  • Ensure that the tractor is serviced regularly to identify any issues before they escalate
  • Consider using fuel additives to keep your engine clean
  • Avoid overloading your tractor as it may strain the engine

By following these tips, you should be able to correct the acceleration and power loss issues in your kubota m108s tractor. Regular maintenance is crucial to avoid such problems in the future.

Problem 4: Electrical System Malfunction

Causes Of Electrical System Malfunction In Kubota M108S Tractors

The kubota m108s is a reliable tractor model used by farmers worldwide. However, electrical system malfunctions can occur in these machines, and usually, they are a result of the following causes:

  • Damaged or corroded wiring
  • A faulty battery
  • Defective alternator
  • Broken starter motor
  • A blown fuse.

These problems should not be taken lightly as they can severely impede the functionality of the tractor.

Symptoms Of Electrical System Malfunction

It is vital to recognize the signs of electrical system problems in kubota m108s tractors timely. Following are the most common symptoms:

  • The battery appears to be draining too frequently
  • Malfunctioning of the lights or gauges
  • The tractor fails to start
  • The alternator warning light illuminates
  • Cracking sounds from the wiring.

It is essential to be aware of these symptoms, and if you notice any of them in your kubota m108s tractor, it’s best to get it checked out by a mechanic as soon as possible.

Diagnosis And Repair Of The Issue

Diagnosing kubota m108s’s electrical system faults is not an easy task and often requires a mechanic’s expertise. However, following are some general tips that may assist in identifying the problem:

  • Turn the ignition key on and check whether the dash lights up correctly
  • Use a multimeter to check the battery’s voltage
  • Check the alternator’s output with a voltmeter
  • Look for damaged or corroded wiring.

Based on the cause of the problem, the mechanic may execute one of the following repair solutions:

  • Replacing or repairing damaged wiring
  • Installing a new battery or alternator
  • Repairing the starter or replacing it
  • Replacing blown fuses.

Whatever the repair is, addressing the issue early on can save a kubota m108s owner significant stress, time, and money.

Now that you are familiar with kubota m108s’s electrical system malfunction causes, symptoms and diagnosis, you’ll be better prepared to handle such a situation if necessary. Don’t forget the importance of regular inspections of wiring, fuses, and battery terminals to keep electrical problems at bay.

If you face any electrical system issues with your kubota m108s tractor, it’s best to get it checked out as soon as possible to avoid severe damage, significant inconvenience, and more costly repairs.

Problem 5: Transmission Issues

Description Of Common Transmission Problems In Kubota M108S Tractors

Kubota m108s tractors are known for their durability and reliability. However, some common transmission problems can still occur due to various reasons. Here are some of the most common issues that you might encounter with the kubota m108s tractor transmission:

  • Transmission slipping: Occurs when the gears of the transmission don’t engage or stay engaged.
  • Transmission overheating: Can happen due to excessive hauling or towing, low fluid levels, or clogged filters.
  • Transmission not shifting: Can occur when the gears don’t change smoothly due to damaged parts or a low fluid level.
  • Strange noises coming from the transmission: This can be caused by worn-out gears or a damaged clutch.

Signs Of Transmission Problems

It’s essential to know the signs of transmission problems to avoid further damage to the tractor. Here are the most common signs that might indicate transmission issues with your kubota m108s tractor:

  • Gears slipping when under load.
  • Difficulty in shifting gears.
  • Grinding or humming noises coming from the transmission.
  • Burnt or discolored transmission fluid.
  • Transmission warning light on the dashboard.

Solutions To Fix The Issue

If you notice any of the signs mentioned above, you should immediately address them before they cause severe damage to your kubota m108s tractor. Here are some solutions that can fix transmission problems in kubota m108s tractors:

  • Check the transmission fluid levels and change the oil if dirty or low.
  • Clean or replace the transmission filter.
  • Replace faulty gears, gears synchronizers, or a worn-out clutch.
  • Regular maintenance checks can detect transmission issues early on and prevent them from becoming more severe.

Kubota m108s tractors are reliable, but transmission problems can happen due to various reasons. Knowing the signs and how to fix them can help keep your tractor running efficiently and prevent expensive repairs in the future.

Problem 6: Fuel Injection System Problems

Kubota m108s tractors are known for their durability, but like any other machinery, they can develop problems. One of the most common issues that affect these tractors is fuel injection system problems. Here is all you need to know about this problem.

Causes Of Fuel Injection Issues In Kubota M108S Tractors

There are several reasons why a kubota m108s tractor’s fuel injection system could fail. Here are some of these causes:

  • Dirty fuel filters
  • Clogged fuel injectors
  • Low-quality fuel
  • Water in the fuel
  • Worn-out fuel pump

Symptoms Of Fuel Injection Issues

Fuel injection problems can significantly impact a kubota m108s tractor’s performance. Here are some symptoms one may experience if their tractor has fuel injection issues:

  • Difficulty starting the tractor
  • Rough idling
  • Poor fuel economy
  • Black smoke coming out of the exhaust
  • Loss of engine power
  • Engine misfires

Diagnosis And Repair Of The Problem

To fix a fuel injection system issue, it’s best to consult a qualified technician. However, there are some things a kubota m108s tractor owner can and should do before heading to the repair shop. These steps include:

  • Checking the fuel filters and replacing them if they’re dirty
  • Draining the fuel tank if there’s water in it
  • Avoiding low-quality fuel
  • Checking for clogged fuel injectors and replacing them if necessary

When you take your kubota m108s tractor to a repair shop, the technician will likely perform the following checks:

  • Checking the fuel injection pump’s pressure and volume readings
  • Checking for any air leaks in the fuel system
  • Replacing any faulty fuel injectors
  • Replacing the fuel injection pump if it’s worn out

Fuel injection problems are a common issue that kubota m108s tractor owners may encounter. By understanding the causes and symptoms of this issue, owners can take proactive measures to prevent their tractors from developing issues.

Problem 7: Steering And Suspension Problems

Description Of Steering And Suspension Problems In Kubota M108S Tractors

Kubota m108s is a popular tractor model that is often used for agricultural work. However, it is not immune to steering and suspension problems. Some common issues that may arise in m108s tractors include:

  • Worn or damaged steering components
  • Bent or damaged suspension
  • Poor alignment of the wheels
  • Loose or broken suspension parts

Symptoms Of Steering And Suspension Issues

It is essential to diagnose steering and suspension problems early on to prevent further damage. Here are some symptoms of steering and suspension issues in kubota m108s tractors:

  • Difficulty steering or turning the tractor
  • Excessive vibrations in the steering wheel or cabin
  • Uneven tire wear
  • Reduced stability when driving

Solutions To Fix The Problem

If you notice any of these symptoms, it is essential to take action quickly to avoid further damage. Here are some solutions to fix steering and suspension problems in kubota m108s tractors:

  • Inspect and replace any worn or damaged steering components
  • Replace any bent or damaged suspension parts
  • Align the wheels to improve stability and handling
  • Tighten loose suspension parts or replace broken ones

Regular maintenance and inspection of the steering and suspension system can prevent problems before they occur. Ensure that you keep track of your maintenance schedule and inspect your tractor regularly to detect any issues early on.

Remember that fixing steering and suspension problems requires expertise, so do not hesitate to seek professional help. Properly maintained steering and suspension systems are crucial for the safe and efficient operation of your kubota m108s tractor.

Problem 8: Brake System Issues

Brake system issues in kubota m108s tractors can be a huge safety concern for drivers, making it essential to identify the root causes, associated symptoms and appropriate solution. In this section, we will discuss the key points related to kubota m108s brake system issues.

Causes Of Brake System Issues In Kubota M108S Tractors

Brake system issues can be due to several reasons, including:

  • Worn out brake pads and disks
  • Overheating of the brake system
  • Leaks in the brake lines and hydraulic fluid
  • Failed brake pistons or cylinders

Symptoms Of Brake System Issues

It is crucial to identify the symptoms of brake system issues in kubota m108s tractors, including:

  • Reduced braking power
  • Spongy or unresponsive brakes
  • Hard brake pedal
  • Burning smell while braking
  • Brake fluids shortage

Solution To Fix The Problem

Once you identify the cause and symptoms of your tractor’s brake system issue, you can take one or more of the following steps to fix the problem:

  • Replace worn-out brake pads and disks
  • Allow the brake system to cool down appropriately
  • Repair leaks in brake lines and connections
  • Replace failed brake pistons or cylinders
  • Top-up brake fluid

Kubota m108s brake system issues can be a severe safety hazard, and it’s essential to identify the root cause and apply the appropriate solution immediately. Regular maintenance and inspection can help prevent brake system problems and ensure that your tractor is always safe to operate.

Problem 9: Exhaust System Failure

Description Of Exhaust System Failure In Kubota M108S Tractors

The kubota m108s tractors, despite being reliable machines, are prone to experiencing exhaust system failures. Some of these failures include:

  • Cracks or holes in the exhaust manifold
  • Exhaust leaks due to worn-out gaskets
  • Clogged diesel particulate filters (dpf)
  • Damaged catalytic converters
  • Rusty or corroded exhaust pipes

These issues can lead to a variety of problems, such as reduced engine power, increased emissions, and poor fuel efficiency.

Causes Of Exhaust System Failure

There are several reasons why the exhaust system in the kubota m108s tractors may fail, including:

  • Wear and tear due to age and usage
  • Poor maintenance practices
  • Overloading the tractor
  • Using low-quality fuel or oil
  • Exposure to harsh environmental conditions, such as extreme heat or cold

Signs Of Exhaust System Issues

To determine whether your kubota m108s tractor is experiencing exhaust system issues, look out for the following signs:

  • Loud exhaust noise
  • Reduced engine performance
  • Illuminated check engine light
  • Foul smell and smoke from the exhaust
  • Black soot buildup on the exhaust pipe
  • Low exhaust pressure

If you notice any of these signs, it’s essential to have your tractor inspected and repaired as soon as possible to prevent further damage.

Diagnosis And Repair Of The Problem

Proper diagnosis and repair of the exhaust system failure in the kubota m108s tractor require the following steps:

  • Visual inspection of the exhaust system to identify cracks, leaks, or other damages.
  • Testing of the exhaust pressure and flow rate to determine the severity of the issue.
  • Use of diagnostic tools, such as a scan tool, to identify any error codes.
  • Repair or replacement of damaged parts, such as the exhaust manifold, gaskets, or catalytic converter.
  • Cleaning or replacement of the dpf filter if it’s clogged.

It’s recommended to have a professional mechanic handle the diagnosis and repair of the exhaust system to ensure that the problem is fixed correctly. Regular maintenance, such as checking and changing the oil and fuel filters, can prevent exhaust system failures from happening.

Problem 10: Electrical Control System Problems

Causes Of Electrical Control System Problems In Kubota M108S Tractors

Electrical control system problems can be caused by several factors. Some of the main reasons for such issues in kubota m108s tractors include:

  • Faulty wiring or connections
  • Malfunctioning alternator
  • Dead battery
  • Damaged fuses and relays
  • Short-circuits in the wiring system

Symptoms Of Electrical Control System Problems

If you experience any of the following symptoms, your kubota m108s tractor might have an electrical control system problem:

  • Dashboard lights flicker
  • Delayed or no response from the engine when you turn the key
  • Battery failure
  • Loss of power to various systems, including lights, audio, and ignition
  • Malfunctioning gauges

Diagnosis And Repair Of The Problem

If you identify any of the above symptoms, you need to diagnose and repair the problem as soon as possible. Here are the steps you can take:

  • Inspect the wiring connections
  • Check the alternator output
  • Replace the battery, if required
  • Check the fuses and relays for any damage
  • Test for short circuits

If you are not confident in diagnosing and repairing the problem, you should contact a qualified kubota service technician. They can assist you in identifying and repairing the issue. Additionally, performing regular maintenance on your kubota m108s tractor, including battery checks and visual inspections of the electrical system, can help you mitigate these types of issues in the future.

Frequently Asked Questions For Kubota M108S Problems

What Are Common Kubota M108S Problems?

The most common problems associated with kubota m108s include low engine power, overheating, and hydraulic issues. These problems can be resolved by regular maintenance and timely repairs.

How To Fix An Overheating Kubota M108S?

If your kubota m108s is overheating, it could be due to a damaged radiator or low coolant levels. Check and replace the damaged parts and ensure that you refill the coolant as per the manufacturer’s recommendation.

What Is The Average Lifespan Of Kubota M108S?

The lifespan of a kubota m108s depends on its usage and maintenance. On average, a well-maintained kubota m108s could last up to 10 years to 15 years.

Why Is My Kubota M108S Not Starting?

If your kubota m108s is not starting, it could be due to a dead battery, clogged fuel filter, or damaged starter. Check and replace these parts as needed.

How To Maintain A Kubota M108S?

To maintain a kubota m108s, you should follow the recommended maintenance practices outlined in the owner’s manual, including regular engine oil changes, filter maintenance, and inspections. Regular cleaning and lubrication will also help to keep the machine in good working condition.


Considering all the aspects of the kubota m108s problems, it’s clear that it is still a reliable and efficient tractor. While some issues exist, the majority of owners report satisfaction with its performance, fuel efficiency, and low emissions. Investing in regular maintenance and following the manufacturer’s suggestions can help prevent and mitigate any problems that may arise.

Reviewing each case and finding solutions that fit well can contribute to a long-lasting tractor experience. Kubota’s history of providing high-quality machines and customer satisfaction means that these tractors remain a popular choice on farms and other applications. The kubota m108s is a fine tractor that can meet your needs if you pay attention to the potential issues and take the necessary precautions.

With good care, it can provide reliable and efficient service for its intended lifespan.

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