Power
Many forklifts are designed to operate on propane gas. Forklifts which utilize propane are 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 combines with air. The forklift throttle is used to control the flow of vapor. A spark plug ignites the mixture of air and vapor creating pressure which moves the pistons. The pistons run the hydraulic pump and turn the wheels.

Because the types of forklifts that are operated by propane are clean burning and have low emissions, they are suitable to be used within other buildings and warehouses.

Hydraulics
The hydraulic system of the forklift is what allows it to lift and move really heavy stuff from place to place. 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, 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 required, propane forklifts are the most suitable. Unlike a car, a forklift uses its back wheels to turn, that allows the forklift to pivot quickly on a tight radius.