I have a Mini Fastrak 15/36 and the left hydro stopped working today. Once it cooled off, it worked fine again, so I figured it was too hot. Later on, I popped up the seat to take a look and the plastic cooling fan had all of the blades sheared off. I don't know how it happened, but it must have been a while ago. Since the fan wasn't doing any cooling, I figured that it caused my problems. The local dealer had to order a new fan, so I am wondering if 2 overheating incidents will cause that much damage to the hydro? Should I drain the oil and change it to be on the safe side? I am hoping it won't fail for a while because they are very expensive at $600 each through the dealer. Also, if the hydro is bad, will the warranty still cover it? I bought it in March 2007.