Power
There are numerous kinds of forklifts which are powered by propane gas. Forklifts which use propane are really easy 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 combines with air. The forklift throttle is used to control the flow of vapor. A spark plug ignites the air and vapor mixture creating pressure that makes the pistons move. The pistons turn the wheels and run the hydraulic pump.
Because the kinds of forklifts that are operated by propane have low emissions and are clean burning, they are suitable to be used in other buildings and warehouses.
Hydraulics
The hydraulic system of the forklift is what allows it to lift and transport very heavy things from place to place. A pump, tubes and cylinders 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 lifts the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back in the pump.
Steering
Where maneuverability is necessary, propane forklifts are the most suitable. Unlike a car, a forklift utilizes its rear wheels to pivot, which enables the forklift to quickly pivot on a tight radius.