Power
There are numerous kinds of forklifts which are powered 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 used to be able to control the flow of vapor. A spark plug ignites the mix of vapor and air creating pressure which makes the pistons move. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
The forklift's hydraulic system is what allows it to lift and move very heavy things from place to place. Tubes, cylinders and a pump 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, 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 rear wheels to pivot, which allows the forklift to rapidly turn on a tight radius.