Power
Numerous forklifts are designed to operate on propane gas. Forklifts that use propane are very easy 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 then the vapor mixes with air. The throttle of the forklift is utilized to control the flow of vapor. A spark plug ignites the mix of vapor and air creating pressure that makes the pistons move. The pistons turn the wheels and power the hydraulic pump.
Since the kinds of forklifts which are operated by propane are clean burning and have low emissions, they are suitable to be used within other buildings and warehouses.
Hydraulics
The hydraulic system of the forklift is what enables it to lift and transport very heavy stuff from place to place. 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, which raises the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back in the pump.
Steering
Where maneuverability is necessary, propane forklifts are the most suitable. Not like an automobile, a forklift makes use of its back wheels to pivot, which enables the forklift to quickly turn on a tight radius.