Brakes locking up

[nb844]

Just been to pick my tractor up from local dealers. Just had a new hydraulic pump.

On the drive home I discovered that as soon as I touched the brake pedal the back wheels lock up! Anyone got any ideas what has caused this? Brakes fine before, maybe a little on the soft side if anything.

Tractor is a new Holland tl100

 

[TripleSix]

Take it back and get them to sort it...

 

[nb844]

Obviously an option but nothing they will do till Monday and I need this tractor working first thing Monday morning

 

[Exfarmer]

Air in system , needs bleeding by tapping brakes and turning steering from side to side

 

[nb844]

Air in system , needs bleeding by tapping brakes and turning steering from side to side

Do I need to open any bleed screws? Have tried it but doesn’t seem to have worked. Also have the 4wd stuck on but don’t know if that’s connected