Power
Numerous forklifts are made to run on propane gas. Propane-powered forklifts are simple to refill. The gas is stored inside a pressurized tank on the truck's rear. The propane is pushed into the engine, where it is converted into vapor and the vapor mixes with air. The forklift throttle is utilized to control the vapor flow. A spark plug fires up the mix of vapor and air creating pressure which makes the pistons move. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
What allows a forklift to lift and transport heavy stuff from one location to another is the hydraulic system. Cylinders, a pump and tubes 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, 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. Unlike an automobile, a forklift uses its back wheels to pivot, which enables the forklift to quickly turn on a tight radius.