HST Whine Noise

M

MotorCityBear

New member

Equipment
L3901
Aug 3, 2019
23
0
1
Blairsville, GA
I have new L3901HST with about 10 hours on it.

There is a relatively loud and annoying whining noise that I believe is coming from the transmission while driving.

It seems to be louder when the tractor is under a load, like going up hill.

I am hoping someone will tell me this will go away once I get a few more hours on it.
 
SidecarFlip

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
546
83
USA
Use the 'search' feature. Must be at least a hundred threads on that on here.
 
Roadworthy

Roadworthy

Well-known member
Lifetime Member

Equipment
L2501 HST
Aug 17, 2019
1,649
525
113
Benton City, WA
As far as I know it won't go away. It is supposed to get quieter with use. I've read on the forum that the newer Kubota hydraulic fluid (SUDT-2?) Is supposed to do wonders for reducing the whine. On my tractor it seems to be worst in high rangel
 
R

RCW

Well-known member
Lifetime Member

Equipment
BX2360, FEL, MMM, BX2750D snowblower. 1953 Minneapolis Moline ZAU
Apr 28, 2013
8,364
3,993
113
Chenango County, NY
One thing to try is putting it in a lower range.

I drained my fluid during the highly-debated 50 hour service. Noticeable reduction in whine, and it got less noisy still in the next change....just for what it's worth.
 
C

Captaincj

New member
Apr 2, 2019
72
2
0
Hugo, MN
MotorCityBear said:
Thanks for the feedback and advice. I guess at the 50 hour service, I will hope for the best.
Click to expand...
If I understood his post correctly, he replaced the filter and FLUID at his 50 hour. Replacing the fluid isn't required, if you want to emulate his "fix" you'd have to do more than just the minimum 50 hour.
 
FUSE

FUSE

Member

Equipment
B3350-B2650-Z125s-KX008-Bobcat MT100-Case/Davis TF310
May 24, 2017
77
10
8
North Dakota
Like the others have said, its normal. I almost couldn't stand our BX23s when we first got it, but a few hundred hours later I didn't notice it as much...It seems like the HST tractors I have had in the past do get quieter as the hours add up and a few oil change cycles.
 
C

chdinct

New member

Equipment
BX25, 54" deck, Landpride Grapple, Pallet Forks. Kubota Z422-54KW
Jun 28, 2018
7
3
3
65
CT & FL
Your post reminds me of a long thread on TBN about how to reduce hst whine. Apparently a lot of guys had good success reducing the whine by filling the lower half of the ROPS with some kind of insulation material - forget exactly what they were using. Supposedly the hollow ROPS transmits or amplifies the noise. Never got around to trying it on my BX so can't vouch for it.

Sent from my SM-G960U using Tapatalk
 
O

Orange1forme

Active member

Equipment
B2650 HSDC, filled tires, wheel spacers, B2728B , LA534A FEL, 3rd valve kit
Dec 1, 2018
394
56
28
Wa
Nobody has come up with a solution to this, yet? :(

Normal, well?!?!?! :confused:

No additive or anything?

In my cab B2650 it is quite annoying to need hearing protection, even double protection.

So why provide a radio, to drowned out the noise? :D
 
2

200mph

Well-known member

Equipment
L4740-3 Cab, FEL, Fnt Snow Blower L2185, LP Finish Mower, LP Rotary Mower
Mar 3, 2017
1,228
58
48
PA
Maybe it’s from the machining chips that are periodically found in the filter that haven’t made their way out yet. :)
 
You must log in or register to reply here.

Top Bottom