The forks are so sharp, you have to always lower them to the ground when you leave the machine. If anyone walks into them they can be seriously hurt. Full propane tanks are pretty heavy, about as much as a quarter keg. You have to heave a new one up to the truck about 6 or 8 times a week. That's about the only maintenance the driver has to do.
Forklifts are extremely reliable vehicles.
Turn it on, raise the forks a little, go to where you're needed, get to work. The forks can be raised and lowered, and the whole fork assembly can be tilted foward and back about 10 degrees, all with hydraulic hand controls. You don't want to raise the forks too much when you drive around empty because someone could walk into it, but you don't want to have them too low either, because you mustn't catch them on anything, like an uneven floor. That could be disasterous as well, since you could flip the forklift and maybe in the process, get caught under it. More likely, it would just stop real suddenly and you'd go flying foward and hit some immovable part of the machine.