Power
There are numerous types of forklifts which are operated by propane gas. Forklifts that use propane are very simple to refill. The gas is stored in a pressurized tank on the truck's back. The propane is pushed into the engine, where it is converted into vapor and the vapor combines with air. The forklift throttle is used to be able to control the flow of vapor. A spark plug fires up the mix of vapor and air creating pressure which moves the pistons. The pistons turn the wheels and power the hydraulic pump.

Since the types of forklifts that are powered by propane are clean burning and have low emissions, they are suitable to be utilized in other buildings and warehouses.

Hydraulics
The hydraulic system of the forklift is what enables it to raise 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 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
Where maneuverability is required, propane forklifts are the most suitable. Unlike a car, a forklift makes use of its rear wheels to turn, that allows the forklift to rapidly pivot on a tight radius.