Power
There are many types of forklifts which are powered by propane gas. Propane-powered forklifts are easy 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 used to be able 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 within 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 move really heavy stuff 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, that lifts 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 needed, propane forklifts are the most suitable. Unlike a car, a forklift makes use of its rear wheels to pivot, which allows the forklift to rapidly pivot on a tight radius.