Power
Many forklifts are made to run on propane gas. Propane-powered forklifts are really simple 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 utilized to be able to control the vapor flow. A spark plug ignites the air and vapor mixture producing pressure that moves the pistons. The pistons power the hydraulic pump and turn the wheels.

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

Hydraulics
What allows a forklift to raise and move heavy stuff from one location to another is the hydraulic system. Cylinders, a pump and tubes 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 necessary. Not like an automobile, a forklift makes use of its rear wheels to pivot, that enables the forklift to quickly turn on a tight radius.