Power
There are numerous kinds of forklifts which are operated by propane gas. Propane-powered forklifts are really easy 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 forklift throttle is used to control the flow of vapor. A spark plug fires up the air and vapor mixture producing pressure that moves the pistons. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
What enables a forklift to lift and move heavy stuff from one location to another is the hydraulic system. Tubes, cylinders and a pump 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 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. Not like a car, a forklift uses its rear wheels to pivot, that allows the forklift to quickly turn on a tight radius.