Power
There are numerous types of forklifts that are operated by propane gas. Propane-powered forklifts are really easy to refill. The gas is stored in a pressurized tank on the rear of the truck. The propane is pushed into the engine, where it is converted into vapor and then the vapor mixes with air. The forklift throttle is utilized to control the flow of vapor. A spark plug ignites the mixture of vapor and air producing pressure that makes the pistons move. The pistons power the hydraulic pump and turn the wheels.

Propane powered forklifts are suggested for use inside other buildings and warehouses since they are clean burning with low emissions.

Hydraulics
What enables 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 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
Where maneuverability is necessary, propane forklifts are the most suitable. Not like a car, a forklift uses its rear wheels to turn, which allows the forklift to rapidly turn on a tight radius.