Power
Many forklifts are designed to run on propane gas. Propane-powered forklifts are 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 then the vapor mixes with air. The throttle of the forklift is utilized to be able to control the flow of vapor. A spark plug fires up the air and vapor mixture creating pressure which moves the pistons. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
The forklift's hydraulic system is what enables it to raise and move really heavy stuff from place to place. A pump, tubes and cylinders make up the hydraulic system. The pump forces dense fluid in 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
Where maneuverability is necessary, propane forklifts are the most suitable. Not like a car, a forklift makes use of its back wheels to turn, which enables the forklift to rapidly turn on a tight radius.