5320 MFWD Brake Problem

5320landry · Sep 17, 2012

2004 John Deere 5320 MFWD

While preparing food plots for the deer season this weekend, my left brake now feels soft and spongy, goes all the way to the floor with no braking. The right brake works great locking the right wheel as normal.

Now the strange part, when I press both the right and left at the same time, they both go all the way to the floor with out stopping the tractor. So, the left brake does not work, the right brake works, but when both are pressed, both pedals go to the floor without stopping the tractor???

My first thought was the brake master cylinder on the left side died and needs rebuilding, but the right side should not be effected by the left or could some one explain this one to me.

Also I assume you can rebuild the master cylinder or can you buy a rebuilt cylinder?

Thanks in advance for the help...

joecdeere · Sep 18, 2012

yes it can be re-sealed, if you don't have the tech manual shoot me your email and I'll send you a PDF file of it

Joe

jd110 · Sep 18, 2012

The reason both pedals go to the floor when pressed together, is the brake valve has an equalizing function so both brakes hold equally when pressing together. If you have a leak in the left side, the right side backfeeds through the left side also. You could have leak in the brake valve or in the left final drive. If you can disconnect the line from the left side and cap it off, the pedal should be hard. If it still leaks, then the problem is in the valve. If it is hard, then there is a leak in the final drive.