Power
There are many kinds of forklifts that are powered by propane gas. Forklifts that utilize propane are simple to refill. The gas is stored inside a pressurized tank on the truck's rear. The propane is pushed into the engine, where it is converted into vapor and the vapor combines with air. The throttle of the forklift is used to control the vapor flow. A spark plug fires up the vapor and air mixture creating pressure which moves the pistons. The pistons turn the wheels and power the hydraulic pump.

Propane powered forklifts are recommended for use in other buildings and warehouses since they are clean burning with low emissions.

Hydraulics
The forklift's hydraulic system is what enables it to raise and move very heavy things from location to location. A pump, tubes and cylinders make up the hydraulic system. The pump forces dense fluid through the tubing and into the cylinders. The pressure build up pushes a piston, which raises the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back into the pump.

Steering
Where maneuverability is necessary, propane forklifts are the most suitable. Not like a car, a forklift uses its rear wheels to turn, that allows the forklift to turn quickly on a tight radius.