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

Forklifts that utilize propane are suggested for use inside other buildings and warehouses since they are clean burning with low emissions.

Hydraulics
The forklift's hydraulic system is what allows it to lift and move really heavy objects from place to place. Tubes, cylinders and a pump make up the hydraulic system. The pump forces dense fluid through 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. Unlike a car, a forklift utilizes its back wheels to turn, that enables the forklift to turn fast on a tight radius.