Power
There are numerous kinds of forklifts that are operated by propane gas. Propane-powered forklifts are simple to refill. The gas is stored in a pressurized tank on the rear of the truck. The propane is pushed into the engine, where it is converted into vapor and then the vapor combines with air. The forklift throttle is used to be able to control the vapor flow. A spark plug ignites the mix of vapor and air producing pressure which makes the pistons move. The pistons turn the wheels and run the hydraulic pump.

As the kinds of forklifts which are powered by propane are clean burning and have low emissions, they are suitable to be used within other buildings and warehouses.

Hydraulics
What allows a forklift to lift and move 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 build up of pressure pushes a piston, which 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. Unlike a car, a forklift utilizes its back wheels to pivot, that enables the forklift to pivot quickly on a tight radius.