Power
There are many kinds of forklifts which are operated 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 control the flow of vapor. A spark plug fires up the air and vapor mixture creating pressure that moves the pistons. The pistons turn the wheels and power the hydraulic pump.
Since the kinds of forklifts which are operated by propane are clean burning and have low emissions, they are suitable to be used in other buildings and warehouses.
Hydraulics
The hydraulic system of the forklift is what allows it to raise and move really heavy objects from place to place. A pump, tubes and cylinders make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The pressure build up pushes a piston, that raises the forks. When the operator lowers the forks, the hydraulic fluid flows out of the cylinders and back in the pump.
Steering
Propane forklifts work well where maneuverability is required. Unlike a car, a forklift uses its back wheels to pivot, which allows the forklift to rapidly turn on a tight radius.