Brakes not returning

snmhanson · Apr 20, 2011

I have a Kubota B7800 and posted a while ago about it losing power at times when under load. I and a couple of other people thought that it may be the brakes because I could not roll the tractor on flat ground when it was in neutral. I finally had a chance to take a look at it and it turns out that the brake pedals aren't returning after they are engaged. I discovered that and then pulled them up manually and the brakes released. I mowed the lawn after that and didn't notice any decreases in power. Can't say for sure that my brakes are what were causing the issues before but it is a step in the right direction.

Anyway, I discovered what is (hopefully) causing the issue but I haven't fixed it yet. What would be the cause of the brake pedals not returning once engaged? I looked and my HST fluid was at the bottom of the acceptable range. Could that be the reason? Do the brakes use hydraulic pressure to return once you release pressure on the pedals? Any other ideas?

Thanks,

Matt

kevinj · Apr 20, 2011

be sure the return spring is hooked up and lube the linkage

snmhanson · Apr 20, 2011

-Nevermind-

Should have taken a closer look before posting. After looking in the manual and then verifying it on the tractor, I can see that there are springs that return the pedal. I didn't notice them before when I was looking (don't know how I missed them) so I was thinking that maybe they had broke or fallen off. They were still there, so my next thought was that maybe the linkage is binding. I sprayed some lubricant on the linkage and it seems to have helped. The pedals still don't spring back quickly like I would like, but they do seem to come back and disengage the brakes. Hopefully this was what was causing both my braking issues as well as the power issues I was having.

Matt