Power
There are many types of forklifts that are powered by propane gas. Propane-powered forklifts are 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 mixes with air. The throttle of the forklift is utilized to be able to control the flow of vapor. A spark plug fires up the vapor and air mixture producing pressure that makes the pistons move. The pistons turn the wheels and run the hydraulic pump.

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

Hydraulics
What enables a forklift to raise and transport heavy objects from one place to another is the hydraulic system. Tubes, cylinders and a pump make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The pressure build up pushes a piston, that lifts the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back in the pump.

Steering
Propane forklifts work well where maneuverability is necessary. Not like an automobile, a forklift makes use of its rear wheels to turn, that allows the forklift to pivot fast on a tight radius.