hough cm 60 hydraulic problem

Hi I just tried out a loader we bought last week and after loading 2 trucks the hydraulics died, my son was leveling out some gravel not working it hard and it was like some one shut the hydraulics off.We lost everything bucket movement ,no drive and no steering.He said it did not make any nioses it just stopped, the main shaft spins fine.Any good ideas and thank you for any help.