New B2620 1400/1800RPM vibration!!

[MapleLeafFarmer]

So, your saying you feel NO vibration in the seat at any RPMs?

correct..no vibration at all other than slight from the engine purring away.
I have taken my BH65 hoe off maybe 5 - 8 times each time wiping off the 2 large pins at the top and regreasing with a white lithium grease.
Also all the zerks get a shot every 10 hours but with yours being so new its not that I would suspect but wouldn't hurt to try.

When the machine is off when you grab the BH/FEL and give them a tug do they seem as one with the tractor or do they feel loose at all?
How about the seat, does the silver inverted "L" that clamps it to the sliding frame seem to hold tight?
Is the BH centered on the 2 large orange J channels at the bottom?

Just guessing at a few things I would check.

I doubt Kubota would engineer the B2620 with BH/FEL attached that you would have to accept feel like you are sitting on a "high powered vibrator"

 

[Carl_NH]

c
I doubt Kubota would engineer the B2620 with BH/FEL attached that you would have to accept feel like you are sitting on a "high powered vibrator"

And a "high priced" vibrator as well..

 

[JOHNTHOMAS]

Thanks. I'm going to have to do some more checking. It seems to be just the seat which turns a lot easier than on the BX25. I'll do the grab and shake tests to plus some tests while moving the BH controls. It does smooth out or not vibrate as much over 2000rpm. Hood looks smooth at all RPMs.
Maybe I have the Special or Limited super Vibrator seat option for thrills and seat..... ? ....pleasure.

 

[tractchores]

Interesting that you can feel it in the seat, i have had noise, but nothing that ever felt like the seat or machine were vibrating. I think the seat gets installed w the bh at the dealer (not 100% sure), so maybe its installed wrong?

 

[JOHNTHOMAS]

Interesting that you can feel it in the seat, i have had noise, but nothing that ever felt like the seat or machine were vibrating. I think the seat gets installed w the bh at the dealer (not 100% sure), so maybe its installed wrong?

Yes, seat was installed at the dealer when the BH added.

 

[JOHNTHOMAS]

Ran B2620 some last week to do a closer evaluation of my perceived vibration. 1000rpm to 1200rpm, almost no vibration. 1400rpm vibration in seat and under my feet. Ran it up to 1800rpm before vibration diminished and it did at around 1800rpm. Hummm. OK ran rpms up and down between 1400 & 1800rpms and there are points when the vibration lessens considerably at some points between the 1200/1800 like around 1600rpm then back to more vibration up to around 1800rpm. Little vibration over 2000rpm.
Went to Barlows and got the key for a new B2320 FEL, no BH so different seat. The new one at Barlows had the same vibration in the floor but at different rpms and it also smoothed out at 2000rpm. I don't know what harmonic balance is but I know it when I experience it. There seems to be points where tractors vibrate more than at other points and I think I've found my points on my B2320. Feel better now trying another new one that is similiar to mine.
With the different seat on the B2320 without BH vs the B2320 with BH(mine) I can also understand and accept a slight difference in seat vibration. Guess the seat that is fastened down in one (no BH)sort of solid piece is different enough from one that lifts up(with BH) and rotates to face the opposite direction.
OK, now moving on to next question whenever it shows up.