Power
There are numerous kinds of forklifts that are operated by propane gas. Propane-powered forklifts are really simple to refill. The gas is stored inside a pressurized tank on the back of the truck. The propane is pushed into the engine, where it is converted into vapor and the vapor combines with air. The throttle of the forklift is used to be able to control the flow of vapor. A spark plug fires up the air and vapor mixture producing pressure that moves the pistons. The pistons turn the wheels and run the hydraulic pump.

Forklifts that use propane are suggested for use within other buildings and warehouses since they are clean burning with low emissions.

Hydraulics
What allows 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 through the tubing and into the cylinders. The pressure build up pushes a piston, which raises the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back in the pump.

Steering
Where maneuverability is needed, propane forklifts are the most suitable. Unlike a car, a forklift uses its rear wheels to turn, which enables the forklift to quickly pivot on a tight radius.