Power
Numerous forklifts are made to run on propane gas. Forklifts that utilize propane are very 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 afterward the vapor mixes with air. The throttle of the forklift is used to control the vapor flow. A spark plug ignites the air and vapor mixture producing pressure which makes the pistons move. The pistons run the hydraulic pump and turn the wheels.

Since the kinds of forklifts that are operated by propane have low emissions and are clean burning, they are best to be used within other buildings and warehouses.

Hydraulics
What enables a forklift to raise and move 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 rear wheels to pivot, that enables the forklift to pivot fast on a tight radius.