Power
There are numerous kinds of forklifts which are operated by propane gas. Propane-powered forklifts are simple 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 mixes with air. The throttle of the forklift is used to control the flow of vapor. A spark plug fires up the mix of vapor and air producing pressure that moves the pistons. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
What allows a forklift to raise and transport 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 raises the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back into 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, that enables the forklift to pivot quickly on a tight radius.