Power
There are many types of forklifts that are powered by propane gas. Propane-powered forklifts are easy 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 mixes with air. The throttle of the forklift is utilized to control the flow of vapor. A spark plug ignites the vapor and air mixture creating pressure which makes the pistons move. The pistons run the hydraulic pump and turn the wheels.

As the types of forklifts that are powered by propane are clean burning and have low emissions, they are suitable to be used in warehouses and other buildings.

Hydraulics
What enables a forklift to raise and transport heavy stuff from one location 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 into the pump.

Steering
Where maneuverability is required, propane forklifts are the most suitable. Not like a car, a forklift utilizes its rear wheels to turn, which enables the forklift to turn quickly on a tight radius.