Power
There are many types of forklifts which are powered by propane gas. Forklifts that utilize propane are simple to refill. The gas is stored inside a pressurized tank on the rear of the truck. The propane is pushed into the engine, where it is converted into vapor and the vapor combines with air. The forklift throttle is utilized to be able to control the flow of vapor. A spark plug fires up the mixture of vapor and air producing pressure that makes the pistons move. The pistons run the hydraulic pump and turn the wheels.
Propane powered forklifts are recommended for use inside warehouses and other buildings since they are clean burning with low emissions.
Hydraulics
The hydraulic system of the forklift is what enables it to raise and transport very heavy things 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 build up of pressure pushes a piston, that 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 required. Unlike a car, a forklift uses its back wheels to turn, that allows the forklift to turn quickly on a tight radius.