Repeated oil leaks are a common sign that you need to have your hydraulic hose replaced. However, it's not the only reason, so check to make sure it's not a repairable problem. For example, a damaged O-ring allows oil to escape from the hose. In this case you'll need to replace the Oring instead of the entire hose assembly.
Improper connection is another cause of oil leaks. This can occur if the connection is overtightened. Check your hose assembly. If everything looks fine and you're still experiencing oil leaks, it's likely time to replace your hydraulic hose assembly.