Power
Numerous forklifts are made to operate on propane gas. Forklifts that use propane are easy to refill. The gas is stored inside a pressurized tank on the rear of the truck. The propane is pushed into the engine, where it is converted into vapor and the vapor combines with air. The throttle of the forklift is used to control the vapor flow. A spark plug ignites the mix of vapor and air creating pressure that moves the pistons. The pistons run the hydraulic pump and turn the wheels.

Forklifts that utilize propane are recommended for use in warehouses and other buildings since they are clean burning with low emissions.

Hydraulics
The forklift's hydraulic system is what allows it to lift and move really heavy objects from place to place. Cylinders, a pump and tubes make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The pressure build up pushes a piston, that raises 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 utilizes its back wheels to pivot, which enables the forklift to quickly pivot on a tight radius.