Power
Numerous forklifts are designed to run on propane gas. Propane-powered forklifts are really simple to refill. The gas is stored in a pressurized tank on the truck's back. The propane is pushed into the engine, where it is converted into vapor and the vapor combines with air. The throttle of the forklift is utilized to be able to control the vapor flow. A spark plug fires up the mixture of air and vapor creating pressure which moves the pistons. The pistons turn the wheels and run the hydraulic pump.

Forklifts that use propane are recommended for use inside other buildings and warehouses since they are clean burning with low emissions.

Hydraulics
The forklift's hydraulic system is what allows it to raise and transport very heavy things from location to location. A pump, tubes and cylinders 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 raises the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back into the pump.

Steering
Propane forklifts work well where maneuverability is required. Not like an automobile, a forklift utilizes its rear wheels to turn, which allows the forklift to rapidly turn on a tight radius.