Hydrolic jacks

[Duttydog]

Hi I hope someone can help, I've got a Thor Windsport 2005 and for some reason two out of four jacks keep retracting not all the way but 3 to 6 inches off the floor

 

[Holdmybeer]

Hi I hope someone can help, I've got a Thor Windsport 2005 and for some reason two out of four jacks keep retracting not all the way but 3 to 6 inches off the floor

Try extending them, then go under clean the shafts and spray them with silicon, new grease wouldn't hurt either. Then cycle them a time or two.