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Ok ,i know its been a while. I was just liveing with the noise. This winter i decided to rebuild my fel actuators. Very easy by the way. This alone fixed the noise . I havent heard it since. Maybe one was bypassing .

B7200 HST weird noise
Kubota Tractors
Replies 9 Post by Madcat

Is it ok to use mobile 1 synthetic 10w30 oil for my b7200 HST? Or must i use a special oil?

oil change
Kubota Tractors
Replies 3 Post by Madcat

Yes its the original kubota(1640) loader and valve. It only stick when i push the stick quikly in that direction. It sounds mechanical. Not like a stuck seal.Does that make sense? I've lubed what little bit of linkage i can see, but it sounds internal. It makes a kind of "tink" noise when it sticks. The valve just has a row of plungers. It bleeds down from full up in about an hour. How much does a control valve unit cost?

B7200 FEL bleed down
Kubota Tractors
Replies 11 Post by Madcat

Ok i seemed to have stopped the fluttery whistle noise. I sprayed some wd40 down on some linkage ,just under the center cover for the HST. The linkage for the foot pedal and speed lever. While it got rid of the squeeky linkage noise it also resolved my whistle noise. Im think there is a plunger to operate the HST fwd and backwards and it might have been bypassing or had some trash in it. Who knows but atleast its fixed.

B7200 servicing transmission
Kubota Tractors
Replies 8 Post by Madcat