Here's something you might want to try first. Amazon.com Blue devil hydraulic leak seal.I had a leak in my tractor that would have needed to split tractor to repair. Used this and with in running the tractor for an hour it sealed the leak and has not returned might be worth a shot.
I too had a problem with my leds blinking, replaced one of the leds with a Incandescent bulb and they no longer blink. Has to do with the leds charging and discharging.