Power
There are numerous types of forklifts which are operated by propane gas. Forklifts that utilize 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 afterward the vapor mixes with air. The forklift throttle is utilized to control the vapor flow. A spark plug fires up the mix of air and vapor producing pressure that makes the pistons move. The pistons turn the wheels and run the hydraulic pump.
Since the kinds of forklifts that are operated by propane have low emissions and are clean burning, they are best to be utilized inside other buildings and warehouses.
Hydraulics
What allows a forklift to lift and move heavy stuff from one location 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 pressure build up pushes a piston, which raises the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back into the pump.
Steering
Propane forklifts work well where maneuverability is needed. Not like a car, a forklift makes use of its rear wheels to pivot, that allows the forklift to turn quickly on a tight radius.