B2920 HST Creaking Sound

[e171fish]

I finally had a local dealer pick it up about a month ago and the mechanic said he wasn't able to replicate the sound. I went to the dealer and the terrain didn't allow the tractor to but put under load where the chattering occurs. All flat ground. He did try to create strain by placing the tractor in high with the brake set and applying the hst pedal until the relief valve activated. No unusual noises.

He didn't seem to think there was anything wrong and felt it's probably just normal HST noise, some are noisier than others.

I went to another dealer and test drove a B2920 and no unusual chattering/noise similar to mine occurred under load during the test.

The tractor runs great and seems to have all the power that it should. I guess it just one of those things...

Sorry to leave this thread hanging for so long. I've been busy and having it looked at wasn't a priority.

 

[kenb2320]

e171fish, Thanks for reporting back! I got very interested in this thread after hearing the noise coming from your B2920 as it sounds exactly like the noise my B2320 makes. Your's seemed to make the noise easier or under less load than mine. I'm surprised the mechanic was unable to replicate it. I'm debating contacting my dealer about it and asking if they have heard any other complaints and whether Kubota is doing anything. I think the noise is excessive and was very alarming when I first heard it. Its a little comforting knowing others are hearing it also.

 

[BrierPatch]

I finally had a local dealer pick it up about a month ago and the mechanic said he wasn't able to replicate the sound. I went to the dealer and the terrain didn't allow the tractor to but put under load where the chattering occurs. All flat ground. He did try to create strain by placing the tractor in high with the brake set and applying the hst pedal until the relief valve activated. No unusual noises.

He didn't seem to think there was anything wrong and felt it's probably just normal HST noise, some are noisier than others.

The tractor runs great and seems to have all the power that it should. I guess it just one of those things...

Sorry to leave this thread hanging for so long. I've been busy and having it looked at wasn't a priority.

This is the same response I got when I took mine to my dealer as well. I just haven't got around to buying a WSM to start looking into it.

Thanks !

 

[kenb2320]

Well I did a little experimenting with this noise on my b2320 and it definitiely seems to be linked to engine rpm's. If I run the engine rpm's low, say below1800 rpm, and load down the HST by going up a hill in medium range I do not hear it. If I run it at 2200 rpm or above it chatters rather easily with the speed pedal. Not sure if this helps to pinpoint the problem, just an observation.

I'm still afraid to call the dealer and get the dreaded "this is normal" response!

 

[69c4x11]

My B2320 makes the same noise,, I am also concerned?? I was planning on carring it back to dealer to hear a blast of CRAP, along with the 3pt leaking down while running!!! I hate to get upset with them ,but Rhinehart Eq. service is a joke!!! Hate to hear You don'ttheir excuses and You are not operating it by the manual !!

 

[probolpher]

I have owned a B2920 for two years with backhoe and FEL and have not heard any what I would call unusual chattering while driving even with a full bucket, loaded tires and the backhoe attached.

There is a bit of vibration in the bucket and in the foldable ROPS behind where you are sitting. The pins in the ROPS do vibrate quite a bit. It is a noisy transmission compared to the BX23 that I traded. But this is more of a loud whirring sound.

 

[tractchores]

I have owned a B2920 for two years with backhoe and FEL and have not heard any what I would call unusual chattering while driving even with a full bucket, loaded tires and the backhoe attached.

There is a bit of vibration in the bucket and in the foldable ROPS behind where you are sitting. The pins in the ROPS do vibrate quite a bit. It is a noisy transmission compared to the BX23 that I traded. But this is more of a loud whirring sound.

You can fix the ROPS vibration with a couple of screws. I don't recall the size offhand, but if you search on hand you can find it (they're standard sized). It makes the whole thing MUCH quieter. I have not heard any clattering noise on mine and I've worked it very hard, sometimes to the point that the engine bogs (i.e. pulling a huge rock or something with great traction). With the BH there is a clattering type of noise right at idle because something in the BH housing rattles, but it goes away at higher rpm. The only other clattering I've heard on mine was when the slow moving vehicle sign lost a screw and was vibrating.

 

[kenb2320]

probolpher, tractchores,
How high of an rpm do you typically run? ... I have noticed that the chattering on my B2320 is tied to higher rpm say above 2200 rpm. I haven't run mine at full pto speed (2750 I believe) but at 2300-2400 rpm it chatters quite easily. At 1800 - 2000 rpm I can work it pretty hard with no chattering.

 

[Carl Bert]

I finally had a local dealer pick it up about a month ago and the mechanic said he wasn't able to replicate the sound. I went to the dealer and the terrain didn't allow the tractor to but put under load where the chattering occurs. All flat ground. He did try to create strain by placing the tractor in high with the brake set and applying the hst pedal until the relief valve activated. No unusual noises.

He didn't seem to think there was anything wrong and felt it's probably just normal HST noise, some are noisier than others.

I went to another dealer and test drove a B2920 and no unusual chattering/noise similar to mine occurred under load during the test.

The tractor runs great and seems to have all the power that it should. I guess it just one of those things...

Sorry to leave this thread hanging for so long. I've been busy and having it looked at wasn't a priority.

I don't understand why you would leave it at that. Why didn't you just let him listen to your you tube video, as we did? It's pretty clear, watching that video that you have a legit problem. If that didn't convince him, then bring him to your farm, and let him drive it.

I wouldn't let it go. Things like that drive me crazy. After the warrantee is up, your going to be stuck with it.

 

[tractchores]

probolpher, tractchores,
How high of an rpm do you typically run? ... I have noticed that the chattering on my B2320 is tied to higher rpm say above 2200 rpm. I haven't run mine at full pto speed (2750 I believe) but at 2300-2400 rpm it chatters quite easily. At 1800 - 2000 rpm I can work it pretty hard with no chattering.

I vary the RPM for the task at hand. Heavy work or PTO work I'm at full PTO RPM, for the BH I'm around 2k typically, for loader work I'm typically between 2200 and 2500 depending on what I'm doing, so I use a pretty wide variety. I've stressed it pretty hard in all RPMS, as you know the machine has plenty of power even near idle so you can do a lot of work just over 2k rpm. I haven't heard anything like you describe at any of the ranges though. I did buy mine lightly used at around a year old and a tad over 50 hours, so if its something that 'wears in' I may not have heard it.

 

[OrangeRidge]

This is a by-pass valve , hence the variation of conditions ( if at all )
that it occurs under. It doesn't surprise me that many don't have
this , and Dealers aren't bothered. There's no way that Kubota don't
know about this , but car manufacturers are no better in their game either.

 

[displacedPA]

Well i need to make a vid of my B so that you can hear it. When my tractor is warming up there is a buzzing almost sounds like a bypass coming from the engine. I was poking around and feeling with my hands before the motor got to hot. I laid a palm on the oil filter and wow you could feel the frequecy the most on that side of the engine...I checked the said drive shaft covers ect but I think my problem is a little different seeing as my noise is taking place under a warm up condition. ill have to take all the side covers off and try it again. Any ones thoughts on this? Maybe oil filter bypassing of a a releif buzzing?

 

[rswyan]

Mine (B2910) buzzes as well (and possibly not only during warm up) .... but from what I can tell it's just sheet metal ....

 

[displacedPA]

Well I have an update on my current noise on my B2320. Here is the test I preformed. I removed all sheet metal from the front end. Start the tractor and set rpm it low idle. The engine oil filter is where the noise is coming from. When you place your hand on the back of the filter you can feel the vibration intensly. it comes and goes almost like the filter is bypassing maybe>? The nosie comes and goes sometimes is makes the nosie for 5 sec. sometimes 20sec. The noise will also happen when the RPM is set higher however the noise level stays the same plusing on and of sparadicly.

>The oil and filter are less than 20hours old. I will also note that the unit made this noise with the factory filter on as well.
The current fill is Kubota 15w40 and a Kubota branded filter.
The outside temp. was arox. 50F when I started the tractor.

My question should I try a diffrent oil maybe a 5w40 rotella? (Thinner for cold starts)
My other thought is could it be the strainer cloged in the oil pan?

Once the tractor warms up for a good while the noise goes away.

thanks for any input.

 

[kenb2320]

I'm just bumping this thread to see if anyone has discovered what this noise is really caused by. I just did the 50 hr service including changing the hydraulic fluid and that didn't change the noise I hear. I do believe it's the HST pressure relief (bypass valve) set too low but was wondering if anyone could confirm that?

Thanks!

 

[Burtonbr]

Sorry but all I hear is a tractor running in the video. I don't think mine makes that noise but I only have 31 hrs so far if it did ever make an odd noise I probably wouldn't notice it, unless it was so severe I thought it was going to blow, probably comes from riding Shovelhead Harley's for so many years and learning to ignore all the odd noises..

 

[deathtoblackberries]

Sounds like my new B2920 when...the folding ROPS pins are vibrating I have had to reach up and quiet them several times.

 

[tractchores]

Sounds like my new B2920 when...the folding ROPS pins are vibrating I have had to reach up and quiet them several times.

If the ROPS is rattling I believe that screws sized: M10 1.25 pitch metric thread will fit in the molded in nuts near the joint in the folding portion. You can snug them up gently and it prevents a ROPS vibration and noise. There's a thread on here on how to do that with the BH handles as well, which also make a ton of noise.

 

[kenb2320]

It's definitely not the ROPS on my B2320. I hear it mostly with the engine rpms up around 2000 rpm and I put some load on the HST like going uphill. I would think the engine would bog down before the pressure relief would start chattering but it barely does if at all.

 

[deathtoblackberries]

Certain harmonic frequencies (vibrations) will make things buzz and rattle at different rpm's and loads can effect this exactly as you are describing.