Power
There are many types of forklifts which are powered by propane gas. Propane-powered forklifts are simple to refill. The gas is stored inside a pressurized tank on the truck's back. 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 be able to control the vapor flow. A spark plug ignites the mix of air and vapor creating pressure which moves the pistons. The pistons turn the wheels and power the hydraulic pump.

Propane powered forklifts are suggested 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 lift and transport really heavy things 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 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 into the pump.

Steering
Where maneuverability is needed, propane forklifts are the most suitable. Not like a car, a forklift uses its back wheels to pivot, which enables the forklift to pivot fast on a tight radius.