Power
Many forklifts are made to run on propane gas. Propane-powered forklifts 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 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 moves the pistons. The pistons turn the wheels and power the hydraulic pump.
Since the kinds of forklifts which are operated by propane are clean burning and have low emissions, they are suitable to be utilized in warehouses and other buildings.
Hydraulics
The hydraulic system of the forklift is what allows it to lift and transport very heavy objects from place to place. A pump, tubes and cylinders make up the hydraulic system. The pump forces dense fluid through the tubing and into the cylinders. The pressure build up pushes a piston, which 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 a car, a forklift uses its rear wheels to pivot, that enables the forklift to pivot fast on a tight radius.