Power
Many forklifts are made to run on propane gas. Forklifts that use propane are very simple 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 used to be able to control the flow of vapor. A spark plug ignites the air and vapor mixture producing pressure that makes the pistons move. The pistons power the hydraulic pump and turn the wheels.
Forklifts that use propane are suggested for use inside other buildings and warehouses because they are clean burning with low emissions.
Hydraulics
The forklift's hydraulic system is what enables it to lift and transport really heavy stuff from place to place. Cylinders, a pump and tubes make up the hydraulic system. The pump forces dense fluid through 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 in the pump.
Steering
Where maneuverability is needed, propane forklifts are the most suitable. Unlike a car, a forklift uses its back wheels to turn, which enables the forklift to rapidly pivot on a tight radius.