Power
There are many types of forklifts that are powered by propane gas. Propane-powered forklifts are very easy to refill. The gas is stored inside a pressurized tank on the rear of the truck. 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 used to be able to control the vapor flow. A spark plug fires up the vapor and air mixture creating pressure that makes the pistons move. The pistons run the hydraulic pump and turn the wheels.

Because the types of forklifts which are operated by propane are clean burning and have low emissions, they are best to be utilized inside other buildings and warehouses.

Hydraulics
What enables a forklift to lift and transport heavy objects from one location to another is the hydraulic system. 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
Propane forklifts work well where maneuverability is necessary. Unlike an automobile, a forklift makes use of its rear wheels to turn, that enables the forklift to pivot fast on a tight radius.