Congrats on getting the truck!
If the Hydrovac unit is bad the brake fluid can fill up it's canister.
My brush truck did have a 400 gallon water tank laying flat in the botton of the bed. I think it was about 16" tall, so the center of gravity is low. I've talked to guys that drove my truck when it was in service and they said it never let them down and whould go anywhere in snow or mud. I have to finish my current project before I start on that one...
Mike B
