I recently purchased a 1984 Chevy K30 with a 71/2 Diamond Plow. This plow is probably just as old as the truck. It is a hydrolic unit, not the electric hydrolic I have been used to. With these engine driven units, what should I watch for that typically go wrong. What are the strengths and weaknesses. I also want to stock spare parts. Besides belt, disconnects and hose, what else should I keep. One thing I like about this unit it seems simpilar than the westerns and meyers I have had in the past. I like KISS. Also, does anyone know where I can get parts for this online. I usualy use Angelos, but he doesn't carry Diamond parts. I only found one other discount part place but they did not have much.