Power
Many forklifts are designed to operate on propane gas. Forklifts which utilize propane are very simple to refill. The gas is stored in a pressurized tank on the truck's rear. The propane is pushed into the engine, where it is converted into vapor and the vapor mixes with air. The forklift throttle is used to control the vapor flow. A spark plug fires up the mix of vapor and air creating pressure which makes the pistons move. The pistons power the hydraulic pump and turn the wheels.

Forklifts that use propane are suggested for use within warehouses and other buildings because they are clean burning with low emissions.

Hydraulics
What enables a forklift to lift and transport heavy stuff 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 build up of pressure 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
Where maneuverability is necessary, propane forklifts are the most suitable. Not like a car, a forklift makes use of its rear wheels to pivot, that allows the forklift to rapidly pivot on a tight radius.