Power
Many forklifts are made to operate on propane gas. Propane-powered forklifts are very simple to refill. The gas is stored in a pressurized tank on the truck's rear. 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 utilized to control the flow of vapor. A spark plug fires up the air and vapor mixture producing pressure that moves the pistons. The pistons turn the wheels and run the hydraulic pump.

Since the kinds of forklifts which are powered by propane are clean burning and have low emissions, they are best to be utilized in other buildings and warehouses.

Hydraulics
The forklift's hydraulic system is what enables it to raise and move very heavy stuff from place to place. Cylinders, a pump and tubes make up the hydraulic system. The pump forces dense fluid through 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
Propane forklifts work well where maneuverability is necessary. Unlike a car, a forklift utilizes its rear wheels to pivot, that enables the forklift to rapidly pivot on a tight radius.