Power
Many forklifts are designed to run on propane gas. Forklifts that use propane are really easy 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 then the vapor combines with air. The throttle of the forklift is utilized to control the flow of vapor. A spark plug fires up the vapor and air mixture creating pressure that makes the pistons move. The pistons turn the wheels and run the hydraulic pump.

Forklifts that use propane are recommended for use inside other buildings and warehouses because 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 location to location. Tubes, cylinders and a pump make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The pressure build up pushes a piston, that lifts the forks. When the forks are lowered by the operator, 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 makes use of its rear wheels to turn, which enables the forklift to pivot fast on a tight radius.