Power
Many forklifts are designed to run on propane gas. Propane-powered forklifts are simple to refill. The gas is stored in a pressurized tank on the back of the truck. The propane is pushed into the engine, where it is converted into vapor and the vapor mixes with air. The forklift throttle is used to be able to control the vapor flow. A spark plug fires up the air and vapor mixture producing pressure which moves the pistons. The pistons power the hydraulic pump and turn the wheels.
Forklifts that utilize propane are recommended for use in warehouses and other buildings because they are clean burning with low emissions.
Hydraulics
The hydraulic system of the forklift is what enables it to lift and move very heavy stuff from place to place. A pump, tubes and cylinders make up the hydraulic system. The pump forces dense fluid through the tubing and into the cylinders. The pressure build up pushes a piston, which raises the forks. When the operator lowers the forks, 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 an automobile, a forklift uses its back wheels to pivot, which allows the forklift to quickly turn on a tight radius.