Power
There are many types of forklifts that are powered by propane gas. Forklifts that use propane are easy 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 the vapor combines with air. The throttle of the forklift is utilized to be able to control the vapor flow. A spark plug fires up the mix of vapor and air producing pressure which makes the pistons move. The pistons turn the wheels and power the hydraulic pump.

Forklifts that use propane are recommended for use inside warehouses and other buildings because they are clean burning with low emissions.

Hydraulics
What enables a forklift to raise and move heavy stuff from one place to another is the hydraulic system. Cylinders, a pump and tubes 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 into the pump.

Steering
Where maneuverability is necessary, propane forklifts are the most suitable. Unlike a car, a forklift utilizes its back wheels to turn, that enables the forklift to quickly turn on a tight radius.