2023 T2290 (w/22 Hours) HST Belt Noise – Belt or Idler Pulley? and repair Vs take it to the dealer advice?

[TreeCityRains]

Hi all,

I'm new to the forum and looking for advice on diagnosing a belt noise issue on a recently purchased 2023 Kubota T2290.

Background
I recently purchased a used 2023 T2290 with only 22.2 hours. The previous owner was unable to use it due to a medical condition. The tractor was stored on a covered patio and kept on a battery maintainer. The engine was started periodically, but the tractor was not driven for the past two years before I purchased it.

The tractor is still under the Kubota factory warranty until July 2027.

I noticed a noise when I purchased it. It was coming from the HST drive belt area (see attached video). One reason I chose the T2290 over some comparable green tractors was that the linkage and drive systems under the Kubota T2290 appeared simpler and more mechanical, which I thought would make long-term maintenance easier and more reliable.

Observations

• The noise disappears for several minutes if I apply water to the belt.
• The noise also disappears if I manually increase belt tension by pushing on the tensioner/idler pulley using a pry bar.
• The belt and pulleys appear normal on visual inspection. There is no visible rust, or no glazing on the belt. Belt does not have any cracks or defects.
• The tractor has only 22.2 hours of operation.
• The pitch of the noise does not appear to change with engine RPM.
• The tractor drives normally and climbs the moderate hills on my property without any noticeable issues.
• I intentionally drove it up several hills to put additional load on the transmission and drive system. The noise did not change, and the transmission did not hesitate, surge, slip, or show any loss of power.

Troubleshooting Performed

• Inspected the belt for obvious wear, damage, or contamination. No issues.
• Applied water to the belt and observed that the noise temporarily disappeared.
• Manually increased belt tension through the tensioner/idler pulley and observed that the noise disappeared.
• Tested the tractor under load by climbing several hills.

Questions

1. Does this sound more like a worn/slipping belt or a failing idler pulley bearing?
2. Has anyone experienced an idler pulley failure on a T2290 with such low hours?
3. Since the noise disappears when water is applied to the belt, does that point more toward a belt issue than an idler bearing issue?
4. Can a belt that sat unused for two years develop enough glazing, hardening, or a flat spot to cause this type of noise despite having only 22.2 hours?
5. Is a light application of Permatex Belt Dressing a reasonable diagnostic step to help determine whether the noise is belt-related or pulley-related?
6. Has anyone had an idler pulley or idler bearing replaced under Kubota warranty? If so, was it covered?
7. Is there a reliable way to distinguish between a belt problem and an idler pulley problem before disassembling the tractor?
8. Does the fact that the noise pitch does not change with engine RPM and remains unchanged under load provide any clues as to whether the belt or idler pulley is the more likely culprit?
9. Although the hours are very low, the tractor sat for approximately two years without being driven, so I am wondering if the belt may have developed , hardening? I doubt that the belt stretched since it was not under tension when brake is applied. That makes me wonder whether the idler pully spring lost it's tension?

Repair vs. Dealer
I'm trying to decide whether to take it to the dealer or repair it myself. I've done a fair amount of mechanical work, including timing belt replacements on cars, so I'm comfortable tackling the repair if needed.
Since the tractor is still under warranty, I'm trying to determine whether it makes more sense to let the dealer diagnose it first.

Service Manual / Steering Column Removal

1. Any tips for removing the steering wheel or steering column without damaging the shaft threads?
2. Where can I obtain the latest service/shop manual for the T2290?

I appreciate any troubleshooting suggestions, repair experiences, warranty feedback, or advice from other T2290 owners.

Video1
Video2
Video3

Thanks!

 

[Anil8tor]

Hi all,

I'm new to the forum and looking for advice on diagnosing a belt noise issue on a recently purchased 2023 Kubota T2290.

Background
I recently purchased a used 2023 T2290 with only 22.2 hours. The previous owner was unable to use it due to a medical condition. The tractor was stored on a covered patio and kept on a battery maintainer. The engine was started periodically, but the tractor was not driven for the past two years before I purchased it.

The tractor is still under the Kubota factory warranty until July 2027.

I noticed a noise when I purchased it. It was coming from the HST drive belt area (see attached video). One reason I chose the T2290 over some comparable green tractors was that the linkage and drive systems under the Kubota T2290 appeared simpler and more mechanical, which I thought would make long-term maintenance easier and more reliable.

Observations

• The noise disappears for several minutes if I apply water to the belt.
• The noise also disappears if I manually increase belt tension by pushing on the tensioner/idler pulley using a pry bar.
• The belt and pulleys appear normal on visual inspection. There is no visible rust, or no glazing on the belt. Belt does not have any cracks or defects.
• The tractor has only 22.2 hours of operation.
• The pitch of the noise does not appear to change with engine RPM.
• The tractor drives normally and climbs the moderate hills on my property without any noticeable issues.
• I intentionally drove it up several hills to put additional load on the transmission and drive system. The noise did not change, and the transmission did not hesitate, surge, slip, or show any loss of power.

Troubleshooting Performed

• Inspected the belt for obvious wear, damage, or contamination. No issues.
• Applied water to the belt and observed that the noise temporarily disappeared.
• Manually increased belt tension through the tensioner/idler pulley and observed that the noise disappeared.
• Tested the tractor under load by climbing several hills.

Questions

1. Does this sound more like a worn/slipping belt or a failing idler pulley bearing?
2. Has anyone experienced an idler pulley failure on a T2290 with such low hours?
3. Since the noise disappears when water is applied to the belt, does that point more toward a belt issue than an idler bearing issue?
4. Can a belt that sat unused for two years develop enough glazing, hardening, or a flat spot to cause this type of noise despite having only 22.2 hours?
5. Is a light application of Permatex Belt Dressing a reasonable diagnostic step to help determine whether the noise is belt-related or pulley-related?
6. Has anyone had an idler pulley or idler bearing replaced under Kubota warranty? If so, was it covered?
7. Is there a reliable way to distinguish between a belt problem and an idler pulley problem before disassembling the tractor?
8. Does the fact that the noise pitch does not change with engine RPM and remains unchanged under load provide any clues as to whether the belt or idler pulley is the more likely culprit?
9. Although the hours are very low, the tractor sat for approximately two years without being driven, so I am wondering if the belt may have developed , hardening? I doubt that the belt stretched since it was not under tension when brake is applied. That makes me wonder whether the idler pully spring lost it's tension?

Repair vs. Dealer
I'm trying to decide whether to take it to the dealer or repair it myself. I've done a fair amount of mechanical work, including timing belt replacements on cars, so I'm comfortable tackling the repair if needed.
Since the tractor is still under warranty, I'm trying to determine whether it makes more sense to let the dealer diagnose it first.

Service Manual / Steering Column Removal

1. Any tips for removing the steering wheel or steering column without damaging the shaft threads?
2. Where can I obtain the latest service/shop manual for the T2290?

I appreciate any troubleshooting suggestions, repair experiences, warranty feedback, or advice from other T2290 owners.

Video1
Video2
Video3

Thanks!

Hello,
The easiest way to determine belt or pulley issues is to get a mechanics stethoscope and listen to the pulleys. Under normal conditions you will just hear normal engine noise. if the bearing in the pulley is bad you'll hear grinding or "screeching" noises. The mechanics stethoscope is a simple diagnostic tool that everyone should have in their kit. Good luck!

 

[Bee-Positive]

When was the last time everything was cleaned and greased?

If I'm not mistaken the warranty does not cover perishable items - i.e. belts. Even if the belt looks good replace the belt yourself with an OEM belt to eliminate that aspect and save money the dealer would charge you for the belt and labor.

If adjustable set the tensioner according to the manual. If not it could be the spring, not sure if that part is covered by the warranty, but maybe.

Use a straight edge to check that the pulleys are all on the same plane and not bent.

If the problem still exists get the dealer involved.

 

[TreeCityRains]

Hello,
The easiest way to determine belt or pulley issues is to get a mechanics stethoscope and listen to the pulleys. Under normal conditions you will just hear normal engine noise. if the bearing in the pulley is bad you'll hear grinding or "screeching" noises. The mechanics stethoscope is a simple diagnostic tool that everyone should have in their kit. Good luck!

thanks. The idler pully constantly moves, so not sure it will be able to put the stethoscope on it. The pully is also quite hidden, so it is kind of difficult to get to it. Let me try one and let you know how it goes.

 

[TreeCityRains]

When was the last time everything was cleaned and greased?

If I'm not mistaken the warranty does not cover perishable items - i.e. belts. Even if the belt looks good replace the belt yourself with an OEM belt to eliminate that aspect and save money the dealer would charge you for the belt and labor.

If adjustable set the tensioner according to the manual. If not it could be the spring, not sure if that part is covered by the warranty, but maybe.

Use a straight edge to check that the pulleys are all on the same plane and not bent.

If the problem still exists get the dealer involved.

the tractor is pretty clean. I oiled the linkages under the tractor. I did not grease anything. I did not see any grease ports.

When the tractor was not used for the last two years, it was parked with brake applied. In this position, the spring always is stretched. But I think this is by design and all tractors are expected to be parked with brake applied so I am guessing this should not have stretched the spring.

I also suspected the spring since the belt feels slightly loose. But I did not compare to a new one to see how it feels.

I don't see anything bent and the belt seems to be running pretty straight.

Thanks.

 

[Anil8tor]

thanks. The idler pully constantly moves, so not sure it will be able to put the stethoscope on it. The pully is also quite hidden, so it is kind of difficult to get to it. Let me try one and let you know how it goes.

)kay you want to put the end of the stethoscope on the bolt holding the pulley.It doesn't spin, at least I hope not!

 

[Bee-Positive]

the tractor is pretty clean. I oiled the linkages under the tractor. I did not grease anything. I did not see any grease ports.

Interesting, I just looked at the parts diagram and didn't see any grease zerks either. Not sure why not...

Do you have the 42" deck (2 blades) or the 48" deck (3 blades). Seems like a lot of play in your pictures, just wondering if the wrong belt got put on even if only 22 hours. You never really know what a previous owner might have done (just throwing stuff at the wall to see what sticks at this point).

 

[TreeCityRains]

Interesting, I just looked at the parts diagram and didn't see any grease zerks either. Not sure why not...

Do you have the 42" deck (2 blades) or the 48" deck (3 blades). Seems like a lot of play in your pictures, just wondering if the wrong belt got put on even if only 22 hours. You never really know what a previous owner might have done (just throwing stuff at the wall to see what sticks at this point).

I have the 48 in deck (3 blade). This is the HST belt that connects the engine to the transmission. I did ask the previous owner, and he said there was no work done on the tractor.

Thanks.

 

[Runs With Scissors]

Good avice above.

The only thing I can offer is to "steer clear" of any sort of "Magic-Voodoo Belt Dressing".

Even if it quiets the belt down, it still won't tell you WHY the belt is squeaking, and now it's covering your pulleys.

You'd simply be masking the symptom, not finding the cause.

In my opinion that is like trying to stop a leaking seal with "Motor Honey".....or some such nonsense "leak stopper".

(And "yes" my dad had a can of it lying around....but I digress )

Just my .02

Good luck.