Power
Numerous forklifts are made to run on propane gas. Forklifts that use propane 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 vapor flow. A spark plug fires up the air and vapor mixture creating pressure that makes the pistons move. The pistons turn the wheels and power the hydraulic pump.

Propane powered forklifts are recommended for use in warehouses and other buildings because they are clean burning with low emissions.

Hydraulics
What enables a forklift to lift and transport heavy things from one place 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, that lifts the forks. When the operator lowers the forks, 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 an automobile, a forklift uses its rear wheels to turn, which enables the forklift to quickly pivot on a tight radius.