Power
There are many kinds of forklifts which are powered by propane gas. Forklifts that use propane 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 combines with air. The throttle of the forklift is used to be able to control the vapor flow. A spark plug fires up the air and vapor mixture creating pressure that moves the pistons. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
What enables a forklift to raise and transport heavy things from one place to another is the hydraulic system. A pump, tubes and cylinders 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 forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back into the pump.

Steering
Where maneuverability is necessary, propane forklifts are the most suitable. Unlike an automobile, a forklift makes use of its back wheels to turn, that allows the forklift to quickly pivot on a tight radius.