6 Most Common Kubota Regeneration Problems & Solutions

Despite some customers raising worries about Kubota regeneration difficulties, the company nevertheless boasts strong motors and an intuitive transmission. 

According to several customers, the tractor reportedly stopped running abruptly in the middle of a popular road.

The regeneration system or diesel particle filter (DPF) issue was mostly to blame for this. Even after multiple fixes, it keeps failing. Another crucial element is often driving short distances. It is also ridiculous!

This detailed article has outlined problems, causes, and potential remedies. Let’s get started right now.

The Most Common Problems with Kubota Regeneration

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Short drives, improper oil, malfunctioning sensors, clogged Diesel Particulate Filters, and inadequate oil all contribute to regeneration issues.

Regeneration involves oxidizing the accumulated soot from a filter. To comply with environmental regulations, your Kubota tractor may be fitted with an after-treatment system consisting of a diesel oxidation catalyst (DOC) and a diesel particle filter (DPF)

An ongoing procedure known as an active regeneration cycle takes place while your tractor travels along the road. A dashboard warning light alerts the driver when the DPF is being cleaned or is being monitored by a computer sensor.

It has been revealed that Kubota tractor regeneration faults are relatively common. A significant number of its customers shifted from Kubota to other brands due to persistent regeneration problems.

If the fuel tank is less than 25% full, the regeneration procedure won’t begin. Check the gasoline level in the tank on a regular basis and top it off as needed to ensure smooth regeneration.

The regeneration process is hampered by using incorrect, subpar oil. Diesel engine oils with low sulfur and ash content are best for efficient regeneration.

The sensor is what the engine uses to start the regeneration process. Faulty sensors prevent the engine from starting, which halts the DPF process. If the sensors are not in excellent condition, check them out and replace them.

Your tractor’s filter has to be replaced often to prevent clogs and engine seizing.

1. Passive Regeneration

Particulate matter in the diesel particulate filter can be oxidized via a process called passive regeneration (DPF). Because it just requires a few pieces and the passive regeneration process is straightforward, it is portable and quick to set up.

This sort of regeneration happens during run time. Because of the way it is constructed, your tractor burns all soot particles inside the filter quickly when it reaches high operating temperatures.

The fact that an engine only experiences high temperatures while moving at a rapid speed in this scenario is crucial to remember.

Passive regeneration occurs when the engine temperature rises to more than 350 degrees Celsius, and the tractor moves while the accumulated soot is burned off.

As opposed to other types of tractors, Kubota tractors seldom reach the 60 to 70 km/h speed limit.

2. Active Regeneration

Kubota manufacturers created the active regeneration technology to overcome the limitations of passive regeneration. 

If the duty cycle does not provide high enough exhaust temperatures, the pressure sensors in the DPF can nevertheless detect soot loading. Therefore, active regeneration is required.

Due to the increased engine temperature brought on by the soot buildup, the soot in this process burns when it reaches 40% to 45% of the filter.

This function was included since, in the majority of cases, tractor drivers are unable to go over the speed limit required for passive regeneration because of their heavy workload.

3. Sensor Failing

Failure of a sensor might cause regeneration problems since it tells the engine to start active or passive regeneration.

This is due to the fact that when a sensor malfunctions, the continuous cycle of the regeneration process ends, which might trigger an engine seizure.

When your dashboard’s DPF light begins to flash, you have two choices. You’ll be able to tell when to recondition when the regen light starts to flicker and beep.

As long as none of your two alternatives is pressed, the light will continue to flash and beep.

The delay button could be selected. If you’re in a shed or another confined space, for example, you’ll do this. The tractor won’t start the regeneration process in this scenario. 

The procedure cannot yet be started in a secure manner. The alternate course of action is to begin regeneration immediately; if you are outside and not in a place that may catch fire, choose this.

4. Short Drives

Another element that could exacerbate this problem is short drives. Long-term short-distance trips might be risky since the engine can’t complete the regeneration process in these circumstances.

Driving regularly for 20 to 30 minutes, for instance, at a speed of about 60 km/h. By avoiding quick excursions or by driving nonstop (leaving the engine running for long periods of time). 

Before running the car to renew the filter, make sure the engine is warmed up. When driving downshifts to boost engine speed, warm up a cold engine.

5. Dirty DPF

Failure to monitor your DPF might result in problems. Ash buildup may reduce your filter’s lifetime and harm it. 

Schedule cleanings and adhere to the recommended maintenance schedule at all times.

Professionals have “Forced Regeneration” as their top choice. The DPF may be cleaned using this technique, which was created by the manufacturer.

This is not a task that the individual can complete without the proper equipment and access to the vehicle management systems.

In order to do this, the mechanic must conduct a DPF clean cycle that requires running the engine for an extended period of time at a high RPM. In order to clean the DPF filter by burning its contents, the ECU causes this cycle to heat the filter to high temperatures.

Another choice can be to have the DPF manually cleaned to clear the filter. The DPF will be restored to almost new state using ultrasonic technology and specialized chemicals.

DPF cleaning chemicals, which lower the temperature needed for soot to burn off, may in some rare circumstances assist your car in regeneration. They are by no means assured, though, especially if ash rather than soot is clogging the filter. 

We advise that you first get a professional opinion, but if the expense of a forced regeneration, expert clean, or replacement is put in front of you, it could be worthwhile to choose that path first.

Especially if your car was built between 2011 and 2014 and the DPF is placed farther away from the engine than is currently the norm.

6. Insufficient Oil

Another possible reason for this problem is a lack of oil in the engine. It’s because if the amount of oil in the engine is less than a fourth of its full capacity, the regeneration process won’t start until you fill it off.

A part of the tailpipe houses the DPF. The DPF can become blocked if the incorrect oil is used, which has a greater SAPS level. Performance and fuel economy will suffer significantly as a result.

An engine’s exhaust system and even the engine itself may sustain damage as a result of an overpressured buildup of exhaust gases brought on by a clogged DPF.

In severe circumstances, the car won’t be able to be driven due to engine performance issues.

Kubota Regeneration Problems: Are They A Deal Breaker?

Even though it is theoretically supposed to stop flashing after your tractor starts the regeneration process, however, many Kubota tractor owners complain that occasionally the regeneration indicator does not switch off and instead stays on.

Regular regeneration carries a concern since it frequently causes greater fuel consumption and heating issues with adjacent components.

Kubota’s regeneration problems are annoying to users. The DPF getting blocked was a common complaint among them. The issue still exists even after replacing the DPF.

A few attempt to physically clean the DPF by taking it out, but it still gets clogged. It’s also difficult to clean manually.

I must agree that the Kubota tractor may have regeneration problems however, I should make clear to you that this tractor enjoys a good reputation.

Your problem could momentarily be resolved by routine DFP maintenance and cleaning.

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( Farming Equipment Expert )

Marvin is an expert in farming equipment with a strong background in agricultural engineering. He graduated from Kansas State College of Agriculture, where he received a degree in Agricultural Engineering and specialized in farm equipment design and maintenance.