I noticed on my Dumptruck, when I'm parked at a house, that where the PTO is, there will be a few drips. Its been like this all spring so far,I've been in denial and ignoring it. Today, I went to dump some water out of the dump body, and it would't go up too high, just lifted about 1 1/2'. I know nothing about the PTO, is there a fluid resovoir i can check and refill? Help....