Power
Numerous forklifts are designed to operate on propane gas. Forklifts which utilize propane are very simple 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 mixes with air. The throttle of the forklift is utilized to be able to control the flow of vapor. A spark plug ignites the mix of air and vapor producing pressure that moves the pistons. The pistons run the hydraulic pump and turn the wheels.

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

Hydraulics
The hydraulic system of the forklift is what enables it to raise and move very heavy objects 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 lifts the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back into the pump.

Steering
Where maneuverability is required, propane forklifts are the most suitable. Not like an automobile, a forklift uses its rear wheels to pivot, which allows the forklift to pivot fast on a tight radius.