New B2620 1400/1800RPM vibration!!

JOHNTHOMAS · Sep 2, 2012

Have a new B2620HST which has 1.3 hours on it. Hit the key and instant start, let it warm up a bit, start increasing throttle and seat feels like a high powered vibrator has been turned on at around 1400RPM

and up to a bit over 1800RPM and then it smooths out.

This isn't my first Kubota tractor

and it isn't my first B model Kubota tractor. I can say it's my first 2012 B2620HST with FEL and Backhoe.:thumbsup: So.........you owners with a new B2620 HST Backhoe (Has a different seat than a B without a BH which is transmitting the vibration) step up and tell me your experience.
Let me repeat, this isn't my first Kubota so I've got SOME experience with Kubotas but none before have done this but the seat on the BX25 is different than the seat on the B2620 with BH.

beckmurph · Sep 2, 2012

Well, mine vibrated at 1800 to about 2000. Once above 2000 it was smoother. I could usually tell what rpm I was running at without looking at the tach.

displacedPA · Sep 2, 2012

John did you sell your B2320?
Congarts on you new B! I have to bump my throttle up just a bit from idle to stop the vibrating on mine. However I dont have the TLB. Let us know how you like it... I wish i had a back hoe at times.. where are the Pics??

JOHNTHOMAS · Sep 3, 2012

displacedPA said:
John did you sell your B2320?
Congarts on you new B! I have to bump my throttle up just a bit from idle to stop the vibrating on mine. However I dont have the TLB. Let us know how you like it... I wish i had a back hoe at times.. where are the Pics??

Traded the B2320 "geared" with 20 hours and the BX25 with 150 hours to Barlows for the new B2620 HST FEL BH. Your a bit behind, I'd posted pics of the B2620 in the garage at Barlows getting the BH installed. It was probably over in Kubta Buying/Pricing forum. I'll see if I can find the pics.

displacedPA · Sep 3, 2012

JOHNTHOMAS said:
Traded the B2320 "geared" with 20 hours and the BX25 with 150 hours to Barlows for the new B2620 HST FEL BH. Your a bit behind, I'd posted pics of the B2620 in the garage at Barlows getting the BH installed. It was probably over in Kubta Buying/Pricing forum. I'll see if I can find the pics.

I am a bit behind sir.. well shes a beauty! I think you made a good choice.

bstrom · Sep 22, 2012

I've got an '08, no hoe but the thing has always run smooth at all rpm no matter what is hanging off the back. It's been a great tractor. Only complaint is a sticking hydro pedal I can never seem to get adjusted right so it doesn't shut off when you get off the seat. Big pain. You'll like the tractor but I know from looking at this forum over the past few years you will eventually trade it.:laughing:

JOHNTHOMAS · Sep 22, 2012

bstrom said:
I've got an '08, no hoe but the thing has always run smooth at all rpm no matter what is hanging off the back. It's been a great tractor. Only complaint is a sticking hydro pedal I can never seem to get adjusted right so it doesn't shut off when you get off the seat. Big pain. You'll like the tractor but I know from looking at this forum over the past few years you will eventually trade it.:laughing:

I don't know........I may have my land conquering down to what this B2620 will take care of best. I do miss my BX25 but haven't really used this B2620 enough to do any kind of evaluation. After maybe 25 hours of use I may do a comparison or I like the BX25/B2620 best.

Carl_NH · Sep 22, 2012

I suspect its the BH setup - is the BH on the ground/resting with the vibration or is it raised?

Tires unloaded I presume?

I notice on my B21 the BH on its very nicely balanced but with the rear blade on it has different "vibes" meaning resonance at different RPM's you can feel it thru the frame with the rear blade on at certain RPM.

Tompet · Sep 22, 2012

JT, I had a b2920 TLB (bought from Barlows and traded in an MF2310) and it had screaming loud hydro whine with some vibration in the rpm range you indicated. I was really concerned for the first month or so, talked to Brady, and decided to give it some time. It was always worse in high range. Anyway, after about 50 hours it seemed to get a lot better and was no longer a concern and seemed pretty smooth to me. Especially if I stayed out of high range in certain RPM's/engine load. Of course for you this approach would be problematic....you would have to keep it long enough to put 50 hrs. on it to find out!

Seriously, I think it will be fine. One thing that was annoying on the BH65 was the rattle of the control levers caused by the vibration that sounded like someone shaking a can of coins behind me. I did a thread on a simple fix that took care of that. I since took a page out of your play book and traded that unit to Barlows for a B3300 TLB and I'm pretty happy now. I even hauled the 2920 to Kentucky to see the place in person!

btw, You said the vibration is worse than any of your other tractors? Well, that says a lot from your experiences, but I don't think the seat style you mentioned plays into the vibration concern/cause.

tractchores · Sep 23, 2012

I've got a B2920 with a BH. The BH controls do vibrate at very low RPM, but it just makes an annoying noise VS feeling anything in the seat. One thing I did notice was that the SMV sign bolted to the back of the seat loosened up and was vibrating like crazy and I definitely felt that. Keep in mind that the BH seat doesn't come with the spring dampeners that the standard seat does, so its a rougher ride than a non BH model. I haven't noticed much hydro whine on mine except at high speeds in high gear. Also the ROPS vibrated a fair bit, you can fix that easily by putting 2 bolts in the nuts that are welded into the ROPS, that quieted it down a lot at idle.