Kubota B3030 and B3000 Cab Noise

Mountainman

Active member
Lifetime Member

Equipment
L2501, B7100, B2710 B21, B1750, B2400, B7200
Jul 10, 2022
419
160
43
Attalla Alabama
mossycreekoutdoors.com
Well as the post says looking for others who have a b3030 or b3000 with cab or those that have worked on them. 2 issues trying to figure out and both are stumping me.

1. Rattle at idle right where the propeller shaft connects to the clutch shaft. Goes away with just a little throttle. Coupler on propeller shaft does have some play but not a lot and nothing compared to other B's i have. Clutch shaft doesn't appear to have any up and down or side to side movement. I can use a 2x2 and put some pressure on the propeller shaft when running and rattle lessens. @North Idaho Wolfman said could be the clutch flex plate and/or pilot bushing. Maybe thats what it is.

2. It will drive around all day long on flat ground high med low 2wd 4wd and drives normal with normal hst noise. But going up any incline or backing down an incline it makes a noise sounds just like deck wheels hitting the ground. When i bought it i didn't think anything about ir because thats exactly what it sounded like. But after removing the deck same noise. Noise appears to be coming from under floorpan and i want to say originates under seat area but hard to say for sure. No power loss no slipping nothing abnormal to how it drives. Doesn't do it going downhill or backing up a hill. New fluid and filters all oem. Ive read all the cab noise threads and posts and i can't rule that out. Just trying to figure out what it is. Any thoughts or suggestions appreciated.
 
Last edited:

85Hokie

Moderator
Staff member
Lifetime Member

Equipment
BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
Jul 13, 2013
10,972
2,825
113
Bedford - VA
Daryl - could this be a harmonic thing? At a certain rpm a piece of metal vibrates? And once the rpm changes that harmonic is smoothed out?

I have a BX1850 and once started at idle is shakes and rattles - just small adjustment of throttle it purrs like a kitten.
 
  • Like
Reactions: 1 user

Mountainman

Active member
Lifetime Member

Equipment
L2501, B7100, B2710 B21, B1750, B2400, B7200
Jul 10, 2022
419
160
43
Attalla Alabama
mossycreekoutdoors.com
Daryl - could this be a harmonic thing? At a certain rpm a piece of metal vibrates? And once the rpm changes that harmonic is smoothed out?

I have a BX1850 and once started at idle is shakes and rattles - just small adjustment of throttle it purrs like a kitten.
Definitely not ruling it out although rpm changes don't make a difference. My b21 at high rpm sounds like air is passing through the loader valve and you can grab the line and feel it and this does sound similar so definitely not ruling out harmonics. I think this weekend im gonna have my wife drive it up the driveway while i walk along side and see what it sounds like
 
  • Like
Reactions: 1 user