Power
There are numerous types of forklifts which are operated by propane gas. Propane-powered forklifts are simple to refill. The gas is stored inside a pressurized tank on the truck's back. 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 air and vapor mixture creating pressure which makes the pistons move. The pistons turn the wheels and power the hydraulic pump.

Propane powered forklifts are recommended for use in other buildings and warehouses since they are clean burning with low emissions.

Hydraulics
What enables a forklift to lift and transport heavy stuff 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 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. Unlike an automobile, a forklift makes use of its rear wheels to turn, which allows the forklift to pivot quickly on a tight radius.