Kubota f 3680 intermittent hst drive failure

[kubota Karl]

I have a 2012 kubota f3680 that works well but more than a few times near the endd of cutting lawn the hst lags or is very slow in reverse or forward and i hear it squeeling. Going down hill it may lose all controll for a second or two. Hydraulic hose was leaking a tiny bit but tightened it and has stopped. Fluid level always seems i indicate it is full. Also i note that i have to raise rpm to lift the cutting deck. Any help i am pretty sure I am not competent to take tansmission apart or anything like that. Help

 

[100 td]

How long ago did it get a hydraulic oil and filter change? Suction hose leak also a possibility?

 

[kubota Karl]

How long ago did it get a hydraulic oil and filter change? Suction hose leak also a possibility?

I took it in last year thinking it was the peddle mechanism itself and they repaired it and said hydraulic pressures etc were fine

 

[kubota Karl]

I don’t believe that they changed the oil or filter, many times it will seem to work perfectly but at the end of the 2 acre cut it seems to happen. When it was leaking why was the oil not going down?

 

[100 td]

But what about the oil filter and screen

 

[kubota Karl]

I have no idea about that, I bought it used and no manual to find the screen. I guess i will take it in to the dealer

 

[100 td]

You posted while I was adding pics, if you don't know when the oil filter and screen were last changed/cleaned, it would be a reasonable place to start. Many problems are caused by partially blocked filters/screens. Also check the suction hose for leaks, as previously noted.

 

[100 td]

Screen is 20, suction hose 50, filter, second pic 140.

 

[100 td]

Might be worth finding out what you paid for when it was previously repaired?

 

[kubota Karl]

Ok just noticed the diagrams and will start with that. I just don’t want to damage the transmission so i am a little worried