11 Common Kubota B2601 Problems

Kubota B2601 Problems

It’s easy to fall in love with the Kubota B2601. The four-wheel drive tractor packs plenty of power to handle various tasks in the home or farm.

Moreover, it’s a compact tractor with multiple convenience features. Unfortunately, the mower isn’t without fault. Below are eleven common Kubota B2601 problems and how to resolve them.

About Kubota B2601

Let’s begin with an overview. The following is a recap of the B2601 tractor so you know what you’re dealing with.

  • It’s a four-wheel drive tractor
  • 26hp 3-cylinder diesel engine
  • Takes 60-inch or 70-inch mower decks
  • 3-range HST transition
  • Power steering
  • Skid steer quick attach bucket
  • LA 434 Loader (with 860lb lift capacity)
  • Live independent rear and mid-mount PTO

Kubota B2601 Problems

Problem 1: Kubota B2601 Hydrostatic Transmission Issues

Transmission issues are among the most commonly reported Kubota B2601 problems.

Specifically, users complain about a lack of power, overheating transmission fluid, and transmission system noise.

Leaks are also common. The following are common causes and solutions to these issues.

  • HST transmission noises: If the hydrostatic transmission system (HTS) makes strange noises, the speed control linkage is likely worn or out of adjustment. So, you need to realign it and replace worn or missing parts. Alternatively, you may have insufficient HST fluid. So, check the system and top up the fluid as necessary.
  • Leaking transmission fluid: The main cause of HTS system leaks is a plugged oil return tube. Clean or replace the tube to see whether the leak stops. If not, check for damaged gaskets or seals and change them as appropriate. Also, diagnose the internal transmission housing pressure and change the defective parts.
  • Transmission fluid overheating: Overloading is the main cause of transmission system overheating. So, reduce the load and observe whether the problem disappears. If it doesn’t, check whether you have enough hydrostatic transmission fluid and top up. If the fluid is contaminated, change it.

Problem 2: Kubota B2601 Diesel Fuel Engine Problems

The Kubota B2601 uses an efficient 26-horsepower 3-cylinder engine.

Unfortunately, many owners complain about the engine shutting down without warning, losing power midway through the job, and many other issues.

Here’s what you need to know;

  • The diesel engine shuts off while driving: Abrupt engine failure is often a sign of improper fuel injection timing. You may need to see a mechanic. Additionally, diagnose and clean the filter element or replace dirty filters and ensure the engine is preheated adequately.
  • The diesel engines lose power midway through the operation: Low engine output often signals faulty fuel injection nozzles. So, change or service the injection nozzles. Also, check for clogged fuel lines and service the fuel hoses appropriately. Finally, you may have a plugged filter or defective cylinder head gasket. Troubleshoot and fix these areas too.
  • Issues with dispute choke cables: The dispute choke cable maintains the valve air pressure to ensure enough fuel reaches the engine. This allows the engine to work at low temperatures. See a professional mechanic if you suspect an issue with the choke cable.

Problem 3: Kubota B2601 Electrical System Issues

Electrical issues aren’t as common as transmission and engine issues on the Kubota B2601.

Nevertheless, watch out for the following;

  • The Kubota B2601 battery doesn’t charge: If the battery doesn’t charge, either you have a faulty battery or the electrical connections are loose or corroded. Service or tighten the connections or consider replacing the battery.
  • The tractor’s starter motor won’t turn: This problem is most common when the battery is drained or down. So, recharge the battery or replace it. Also, check for and fix loose wiring.
  • The starter turns too slow: Low battery voltage is the most common cause of slow-turning starters. Recharge the battery and try again. If the battery doesn’t hold a charge, replace it.

Problem 4: Kubota B2601 Quick Tach Loader Connection Issues

Kubota’s quick-attach adapter transforms the loader into a fast-attaching system to save time and energy.

However, it can malfunction. The following are common quick tach loader issues and solutions.

  • Quick-attach loader connection is leak-prone: A leak-prone quick-tach loader system signals loose seals around different fittings. Alternatively, it may point to a faulty hydraulic circuit. So, check the hydraulic fluid filter and tighten any loose seals.
  • Worn or damaged fittings: Constant chafing wears down and sometimes damages the fittings. Repair or replace the fittings to fix the problem.

Problem 5: Kubota B2601 Starting Problems

If the engine doesn’t start, begin by checking whether the problems originate from a dead battery.

Many times it’s the case, and replacing the battery fixes the issue. Otherwise, consider the following;

  • Improper parking brake switch: A faulty parking brake switch makes restarting the tractor mower difficult. Diagnose the switch for loose wires or broken parts and replace them accordingly.
  • Bad spark plugs: The spark plug plays a critical role in starting the engine. Thus, a dead or defective plug always causes starting issues. Clean or replace the electric spark plug and see if the issue resolves.
  • Blocked fuel filter: A clogged fuel filter or compromised fuel system means enough fuel cannot reach the combustion chamber. Clean or replace the filter to fix the issue.

Problem 6: Kubota B2601 Parking Brake Not Fully Engaged

Two issues can cause the parking brake not to engage fully – not pushing the brake firmly enough and malfunctioning tires.

Unfortunately, the tractor won’t start and run if the parking brake is not fully engaged. So, consider the following;

  • Did you push the parking brake firmly enough? Return to the mower tractor and attempt to reengage the parking brake, pushing it more firmly. Does it solve the problem? If not, see a mechanic.
  • One or both tires are sliding or not functioning properly: In this case, you need to consult a professional mechanic.

Problem 7: Kubota B2601 Overheating

If the tractor overheats, you likely have a clogged air filter or a compromised cooling system. Fortunately, both are easy to address;

  • Clogged air filter: If the air filter is clogged, the mower struggles to get enough clean air into the system, thus overheating. Clean or replace the air filters to solve the issue.
  • Compromised cooling system: The cooling system removes the heat generated from the engine system quickly. Therefore, compromised cooling fins can cause heat stagnation and engine overheating. Clean clogged cooling fins and replace the damaged ones to fix the issue.

Problem 8: Kubota B2601 Hydraulic System Malfunctions

Overheating and a hitch that doesn’t lift or lower are the most common hydraulic system issues on the Kubota B2601. Here’s what you need to know to fix the issues;

  • The hydraulic system overheats: Improper oil is the most common cause of hydraulic system overheating. So, use the right oil and ensure a sufficient oil level. Additionally, change the hydraulic fluid filter regularly.
  • The 3-point hitch does not lift or doesn’t lower: In this case, you likely have a damaged hydraulic cylinder or dirty hydraulic or transmission fluid. Troubleshoot the cylinder and change the fluid to solve the issue.

Problem 9: Kubota B2601 Air Filter Concerns

Filthy or worn air filters can cause many performance issues on the Kubota B2601. Here’s how to troubleshoot and fix the most common problems;

  • Clogged air filter: Clogged air filters cause intense soot emissions and compromise the start plug, creating ignition issues. So, replace or clean the air filter as appropriate.
  • Damaged or worn air filter: Worn filters are even worse, as they invite impurities into the combustion process, causing incomplete burning and many related issues. So, again, replace the filter promptly.

Problem 10: Kubota B2601 Steering Wheel Issues

A hard steering wheel is the most commonly reported steering issue among Kubota B2601 owners. In this case, bleeding air from the system to eliminate air locks fixes the problem.

Additionally, clean the sterling wheel filter regularly Two other common problems are;

  • The adjustable steering wheel system has too much free play: A worn steering column coupling or shaft is the most common cause of free-playing steering wheels. Change the faulty component, and the issue disappears.
  • The tractor pulls left or right: Troubleshoot the hydrostatic steering unit if the tractor pulls left or right. In addition, inspect and repair the steering cylinder and linkage component.

Problem 11: Kubota B2601 Seating Issues

Finally, the Kubota B2601 may also present users with a few seating issues, some of which you cannot fix after purchasing the mower.

Here’s what to do;

  • The tractor seat feels too small: If the seat appears too small, check the mower’s seating arrangements before purchasing it and opt for a roomier model that suits your needs. Alternatively, take advantage of the retractable seat belt and adjustable steering wheel to “create” more cabin room.

Kubota B2601 Reviews

Like other Kubota lawn mower owners, B2601 users are impressed with the tractor mower’s design and performance.

Its compact shape, excellent lifting power, high efficiency, and smooth performance with different attachments make it irresistible.

Moreover, it’s a durable tractor that lasts many years with few issues. The best part is that most B2601 issues often arise within the warranty period, which Kubota duly addresses at minimal or no extra charge.


The Kubota B2601 is a powerful 26hp 3-cylinder diesel engine tractor that makes light work of most mowing duties. Unfortunately, it’s not perfect.

So, you can expect a few problems along the way, like occasional hydrostatic transmission noises and a leaky quick-tach loader.

The good news is that many of these issues are easy to troubleshoot and fix. More importantly, the Kubota warranty covers most repair costs.