Power
There are numerous types of forklifts which are operated by propane gas. Propane-powered forklifts are easy 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 the vapor combines with air. The throttle of the forklift is used to control the vapor flow. A spark plug ignites the mix of vapor and air producing pressure that moves the pistons. The pistons turn the wheels and power the hydraulic pump.
Propane powered forklifts are recommended for use in warehouses and other buildings since they are clean burning with low emissions.
Hydraulics
What enables a forklift to raise 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 through 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 in the pump.
Steering
Where maneuverability is required, propane forklifts are the most suitable. Not like a car, a forklift utilizes its back wheels to pivot, which enables the forklift to pivot fast on a tight radius.