Power
Many forklifts are made to run on propane gas. Forklifts which utilize propane are very easy 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 combines with air. The forklift throttle is utilized to be able to control the flow of vapor. A spark plug ignites the mixture of vapor and air producing pressure that moves the pistons. The pistons turn the wheels and power the hydraulic pump.

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

Hydraulics
The hydraulic system of the forklift is what allows it to lift and transport very heavy stuff from place to place. 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, which raises 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 an automobile, a forklift utilizes its back wheels to turn, which enables the forklift to rapidly pivot on a tight radius.