Power
There are numerous types of forklifts that are operated by propane gas. Forklifts which use propane are simple to refill. The gas is stored in a pressurized tank on the back of the truck. The propane is pushed into the engine, where it is converted into vapor and the vapor mixes with air. The throttle of the forklift is utilized 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.

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

Hydraulics
The hydraulic system of the forklift is what allows it to lift and move really heavy stuff from place to place. 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 raises the forks. When the operator lowers the forks, 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 an automobile, a forklift makes use of its rear wheels to pivot, which enables the forklift to pivot fast on a tight radius.