My R60 has hose clamps on hydraulic lines on the fan side of the engine like you have, but mine are all dryno leakage. I had trouble with heater hose clamps after I changed the hoses. They required daily tightening. I replaced all hose clamps on these lines before last year and havent had any trouble since then. I dont know why the old ones leaked because they looked good and I didnt even throw the old ones in the trash. Tom in MN