Power
Many forklifts are designed to run on propane gas. Forklifts that utilize propane are easy to refill. The gas is stored inside a pressurized tank on the truck's back. 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.

Forklifts that use propane are suggested for use inside other buildings and warehouses since they are clean burning with low emissions.

Hydraulics
What allows a forklift to raise and move heavy objects from one location to another is the hydraulic system. Cylinders, a pump and tubes make up the hydraulic system. The pump forces dense fluid through the tubing and into the cylinders. The build up of pressure pushes a piston, that lifts 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 a car, a forklift uses its rear wheels to turn, that enables the forklift to rapidly pivot on a tight radius.