Numerous forklifts are made to operate on propane gas. Forklifts which utilize propane are simple to refill. The gas is stored in a pressurized tank on the truck's back. The propane is pushed into the engine, where it is converted into vapor and then the vapor combines with air. The throttle of the forklift is used to be able to control the flow of vapor. A spark plug ignites the mixture of vapor and air producing pressure that makes the pistons move. The pistons turn the wheels and run the hydraulic pump.
Propane powered forklifts are recommended for use inside warehouses and other buildings because they are clean burning with low emissions.
The forklift's hydraulic system is what enables it to raise and move very heavy things from location to location. Tubes, cylinders and a pump make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The pressure build up pushes a piston, which raises the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back in the pump.
Where maneuverability is required, propane forklifts are the most suitable. Unlike an automobile, a forklift uses its rear wheels to pivot, which enables the forklift to turn fast on a tight radius.