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

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

Hydraulics
The hydraulic system of the forklift is what allows it to raise and transport really heavy objects from place to place. Cylinders, a pump and tubes make up the hydraulic system. The pump forces dense fluid through the tubing and into the cylinders. The pressure build up pushes a piston, which lifts the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back in the pump.

Steering
Where maneuverability is needed, propane forklifts are the most suitable. Unlike an automobile, a forklift makes use of its back wheels to turn, which enables the forklift to turn fast on a tight radius.