Power
There are numerous kinds of forklifts that are powered by propane gas. Propane-powered forklifts are really 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 mixes with air. The forklift throttle is utilized to control the flow of vapor. A spark plug ignites the mix of vapor and air producing pressure that moves the pistons. The pistons power the hydraulic pump and turn the wheels.
As the types of forklifts that are operated by propane are clean burning and have low emissions, they are suitable to be used within warehouses and other buildings.
Hydraulics
The hydraulic system of the forklift is what enables it to lift and move very heavy objects from location to location. Cylinders, a pump and tubes 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 lifts the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back in the pump.
Steering
Propane forklifts work well where maneuverability is needed. Not like an automobile, a forklift utilizes its rear wheels to turn, that allows the forklift to pivot fast on a tight radius.