Power
Many forklifts are designed to run on propane gas. Propane-powered forklifts are 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 afterward the vapor combines with air. The throttle of the forklift is used to be able to control the flow of vapor. A spark plug ignites the vapor and air mixture creating pressure which makes the pistons move. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
What enables a forklift to raise and transport heavy stuff 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 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 in the pump.

Steering
Propane forklifts work well where maneuverability is required. Unlike a car, a forklift makes use of its rear wheels to turn, which allows the forklift to turn quickly on a tight radius.