zetor 5245 loader work sometimes and then quits

[blevin411971]

i just bought a 5245 not sure what year my problem is you can use loader for a short time then it will stop and bleed down it is a leon 590 loader can some one please help me i just replaced the control push pull cables and a hydrom hose .o and bucket also bleeds down i know nothing about hydraulics would appreciate any help god bless