Power
Many forklifts are made to operate on propane gas. Forklifts which use propane are really easy to refill. The gas is stored in a pressurized tank on the back of the truck. The propane is pushed into the engine, where it is converted into vapor and afterward the vapor mixes with air. The forklift throttle is utilized to control the flow of vapor. A spark plug ignites the vapor and air mixture creating pressure which moves the pistons. The pistons run the hydraulic pump and turn the wheels.

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

Hydraulics
What allows a forklift to lift and move heavy things from one location to another is the hydraulic system. Cylinders, a pump and tubes make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The build up of pressure pushes a piston, which raises the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back in the pump.

Steering
Where maneuverability is needed, propane forklifts are the most suitable. Unlike an automobile, a forklift makes use of its back wheels to turn, that enables the forklift to turn quickly on a tight radius.