Power
There are many types of forklifts which are operated by propane gas. Propane-powered forklifts are easy to refill. The gas is stored inside a pressurized tank on the rear of the truck. The propane is pushed into the engine, where it is converted into vapor and afterward the vapor combines with air. The throttle of the forklift is used to be able to control the vapor flow. A spark plug fires up the mix of air and vapor creating pressure which moves the pistons. The pistons turn the wheels and power the hydraulic pump.
Propane powered forklifts are recommended for use within other buildings and warehouses since they are clean burning with low emissions.
Hydraulics
What enables a forklift to lift and move heavy objects from one place to another is the hydraulic system. A pump, tubes and cylinders 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 operator lowers the forks, the hydraulic fluid flows out of the cylinders and back into the pump.
Steering
Where maneuverability is needed, propane forklifts are the most suitable. Not like an automobile, a forklift utilizes its rear wheels to turn, that allows the forklift to pivot quickly on a tight radius.