Power
There are numerous types of forklifts that are powered by propane gas. Forklifts which utilize propane are very simple to refill. The gas is stored in a pressurized tank on the back of the truck. 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 control the flow of vapor. A spark plug ignites the vapor and air mixture producing pressure which moves the pistons. The pistons turn the wheels and run the hydraulic pump.
Because the types of forklifts which are operated by propane have low emissions and are clean burning, they are best to be utilized within other buildings and warehouses.
Hydraulics
The forklift's hydraulic system is what enables it to raise and move very heavy stuff from place to place. 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, that raises the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back into the pump.
Steering
Where maneuverability is necessary, propane forklifts are the most suitable. Unlike an automobile, a forklift makes use of its back wheels to turn, that enables the forklift to rapidly turn on a tight radius.