M7580 wet brake repair advice needed.

[Thejeep2167]

Hello first post here.
I have a kubota m7580 that I purchased used. When I got it the left brake pedal required pumping to lock up the left rear tire. I bled the brakes with traveler tractor fluid, and got A lovely yellow snotty mess out of it upon bleeding. I adjusted the pedal position and both brake pedals were firm and would lock up their respective tires.

On a cold day last winter the left rear tire would not turn at startup And skidded with out the brake pedal being depressed. I tried forward and reverse and eventually the tire freed up, but now the brake pedal will not actuate the brake. If I press on the pedal it is firm, but does not lock up the tire.

I switched the brake lines and the left rear brake still doesn’t work when using the right pedal either. Ie the right and left masters both work, but theproblem is in the left brake.

So my question is how to proceed here. What parts need replacement. Do you think it’s just the seals or the seals and disks/metals. What are the chances that I warped/bent the shaft they slide on?

Thanks

 

[Pau7220]

I bled the brakes with traveler tractor fluid, and got A lovely yellow snotty mess out of it upon bleeding.

I hate the sound of that statement.

What exactly does it say on the master cylinder cap or in the owners manual to use for brake fluid? I looked, I can’t find it.
If you see DOT3 or DOT4, plan on rebuilding everything.

 

[whitetiger]

I hate the sound of that statement.

What exactly does it say on the master cylinder cap or in the owners manual to use for brake fluid? I looked, I can’t find it.
If you see DOT3 or DOT4, plan on rebuilding everything.

They use UDT, SUDT or ISO 32.

 

[Thejeep2167]

so it lookslike at the least I need 10,20,40,50

do 30(piston) 60&70(disks&metals) ever go bad?

 

[Tx Jim]

It wouldn't surprise me if you didn't need to replace brake disk(item 060) & possibly plates(item 070).