Power
There are numerous kinds of forklifts which are powered by propane gas. Propane-powered forklifts are easy to refill. The gas is stored inside a pressurized tank on the truck's rear. 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 air and vapor mixture producing pressure that moves the pistons. The pistons turn the wheels and run the hydraulic pump.
As the kinds of forklifts which are powered by propane have low emissions and are clean burning, they are suitable to be used in warehouses and other buildings.
Hydraulics
What allows a forklift to raise and transport heavy objects from one location 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 lifts the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back into the pump.
Steering
Propane forklifts work well where maneuverability is necessary. Unlike a car, a forklift uses its rear wheels to pivot, that allows the forklift to quickly pivot on a tight radius.