Power
There are numerous kinds of forklifts that are powered by propane gas. Forklifts which use propane are really 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 afterward the vapor combines with air. The forklift throttle is used to be able to control the vapor flow. A spark plug ignites the mixture of vapor and air producing 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 used inside other buildings and warehouses.

Hydraulics
What allows a forklift to raise and move heavy objects from one location to another is the hydraulic system. Tubes, cylinders and a pump make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The build up of pressure pushes a piston, that 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 needed, propane forklifts are the most suitable. Unlike an automobile, a forklift uses its back wheels to turn, that enables the forklift to rapidly pivot on a tight radius.