Power
Numerous forklifts are designed to operate on propane gas. Forklifts that utilize propane are very simple 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 throttle of the forklift is utilized to be able to control the vapor flow. A spark plug ignites the vapor and air mixture producing pressure that makes the pistons move. The pistons power the hydraulic pump and turn the wheels.
Because the types of forklifts that are operated by propane have low emissions and are clean burning, they are suitable to be used inside warehouses and other buildings.
Hydraulics
The hydraulic system of the forklift is what enables it to raise 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 pressure build up pushes a piston, that lifts the forks. When the forks are lowered by the operator, the hydraulic fluid flows out of the cylinders and back in the pump.
Steering
Propane forklifts work well where maneuverability is necessary. Unlike a car, a forklift makes use of its back wheels to pivot, which allows the forklift to rapidly pivot on a tight radius.