Power
There are many kinds of forklifts which are operated by propane gas. Forklifts that use propane are very easy to refill. The gas is stored in a pressurized tank on the truck's back. The propane is pushed into the engine, where it is converted into vapor and afterward the vapor mixes with air. The forklift throttle is utilized to be able to control the vapor flow. A spark plug fires up the mix of air and vapor creating pressure which makes the pistons move. The pistons turn the wheels and power the hydraulic pump.
Propane powered forklifts are recommended for use within warehouses and other buildings since they are clean burning with low emissions.
Hydraulics
What allows a forklift to lift and transport heavy objects from one location to another is the hydraulic system. Tubes, cylinders and a pump 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, which lifts 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. Not like an automobile, a forklift uses its back wheels to turn, that enables the forklift to turn quickly on a tight radius.