Power
There are many kinds of forklifts that are operated by propane gas. Propane-powered forklifts are really 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 the vapor combines with air. The forklift throttle is utilized to control the vapor flow. A spark plug fires up the mix of vapor and air creating pressure which makes the pistons move. The pistons run the hydraulic pump and turn the wheels.

Because the kinds of forklifts which are operated by propane have low emissions and are clean burning, they are suitable to be utilized within warehouses and other buildings.

Hydraulics
What allows a forklift to lift and transport heavy objects from one place to another is the hydraulic system. Tubes, cylinders and a pump 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 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 required, propane forklifts are the most suitable. Not like an automobile, a forklift utilizes its back wheels to pivot, which enables the forklift to quickly pivot on a tight radius.