Power
There are numerous types of forklifts which are powered by propane gas. Propane-powered forklifts are very 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 afterward the vapor mixes with air. The throttle of the forklift is used to be able to control the flow of vapor. A spark plug fires up the vapor and air mixture creating pressure which makes the pistons move. The pistons turn the wheels and power the hydraulic pump.

Since the kinds of forklifts that are powered by propane are clean burning and have low emissions, they are best to be utilized inside other buildings and warehouses.

Hydraulics
What allows a forklift to raise and move heavy stuff from one location to another is the hydraulic system. 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, that raises the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back into the pump.

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