Power
Many forklifts are made to operate on propane gas. Forklifts which use propane are simple to refill. The gas is stored in 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 throttle of the forklift is utilized to control the vapor flow. A spark plug fires up the air and vapor mixture producing pressure which makes the pistons move. The pistons run the hydraulic pump and turn the wheels.
Forklifts that utilize propane are recommended for use within other buildings and warehouses since they are clean burning with low emissions.
Hydraulics
The forklift's hydraulic system is what enables it to lift and transport very heavy objects from place to place. 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 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 required, propane forklifts are the most suitable. Not like a car, a forklift utilizes its back wheels to turn, that enables the forklift to pivot fast on a tight radius.