Power
There are many types of forklifts which are powered by propane gas. Propane-powered forklifts are easy 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 mixes with air. The forklift throttle is utilized to control the flow of vapor. A spark plug fires up the mix of air and vapor creating pressure which moves the pistons. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
What allows a forklift to raise and transport heavy objects from one place to another is the hydraulic system. Tubes, cylinders and a pump 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 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 necessary. Not like an automobile, a forklift utilizes its back wheels to turn, which enables the forklift to quickly turn on a tight radius.