New Holland TM Brakes Issue

[zyklon]

The breaks on my TM have gone. They do nothing. I. noticed over the past few weeks that the pedal had to be pushed to the ground to see any response but nothing now. Not even sending oil to the trailer breaks. What would be causing this? I thought the trailer breaks would have worked at least. Any help would be appreciated.

 

[dave7840]

First thing check the brake fluid assuming not a 175/190. If full probably a master cylinder, if not, o ring on a brake piston if no external leaks. If full be worth changing the fluid ( use lhm) and bleeding the system before taking anything apart

 

[Badshot]

If it's been topped with anything other than lhm, the seals will be rotten and the whole system will need stripping and rebuilding.
Dot 4 eats them.

 

[zyklon]

The reservoir is full with genuine lhm fluid from New Holland. Will get new fluid and try that.

What’s the best way of bleeding it?

Bled the clutch a few times when changing the cylinder but I guess the brakes will be slightly different?

Any way of testing the master cylinder?

 

[dave7840]

I use a piece of clear hose on to each bleed nipple then bleed in order. Should show up which cylinder when bleeding up, the one that's gone probably won't bleed or will still go to the floor once done