Hello, my B21 (probably late 90's- early 2000's?? model with backhoe and loader) keeps blowing the HST filter apart. So far, it has destroyed at least 4 expensive filters. I have changed the oil and all filters (using genuine Kubota filters but generic oil that is supposed to be "approved")and even removed and cleaned the inside of the hyd. tank-it had very little gunk in it. While I had the tank off, I blew air through the lines- everything was clear. I inspected where the return line from the filter enters the trans- it looked good, and I blew air through it- it was clear. Also, i should add, this is happening at about 65 -75 outside air temp, so I don't think its a cold oil issue. The filter blows after the tractor runs just long enough to give me a glimpse of hope that the problem is fixed- anywhere from 2 - 10 minutes. It doesn't seem to matter if it is in neutral or in any gear. I don't think that it has ever blown while driving, but I haven't driven it enough since this problem started to say for sure. Everything seems to function properly, just keep blowing the filter. PLEASE help, I am at a loss as to what to do next.
Thanks in Advance.
Thanks in Advance.