hydraulics on 10011

recently I have been having some trouble with my zetors hydraulics it all started when I broke a hose on that ram that sits next to the 3 point linkage and lost a great deal of oil and now after changing two filters and cleaning out the third filter that sits in that alloy casing on the suction side and refilled with oil the hydraulics dont wont to go all its doing is blowing bubbles of air at the front mounted oil cooler and putting tiny air bubbles through the oil, The power steering is working but the 3 point linkage and remotes are not' does any one know what's going on with problem thanks sam.

there are 2 options;

1 it's sucking air some where!.
2 you blow up your pump after using itt whit out oil.