Power
Many forklifts are made to operate on propane gas. Forklifts which utilize propane are very easy to refill. The gas is stored in a pressurized tank on the rear of the truck. The propane is pushed into the engine, where it is converted into vapor and then the vapor combines with air. The forklift throttle is utilized to be able to control the flow of vapor. A spark plug ignites the air and vapor mixture producing pressure which makes the pistons move. The pistons turn the wheels and run the hydraulic pump.

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

Hydraulics
What allows a forklift to raise and move heavy things from one place 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 lifts the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back in the pump.

Steering
Propane forklifts work well where maneuverability is needed. Unlike an automobile, a forklift utilizes its rear wheels to pivot, which allows the forklift to turn fast on a tight radius.