Power
Many forklifts are designed to operate on propane gas. Propane-powered forklifts are very simple to refill. The gas is stored inside 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 throttle of the forklift is utilized to be able to control the vapor flow. A spark plug fires up the air and vapor mixture creating pressure that moves the pistons. The pistons turn the wheels and run the hydraulic pump.

Forklifts that utilize 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 allows it to lift and transport very heavy stuff from location to location. Tubes, cylinders and a pump make up the hydraulic system. The pump forces dense fluid through 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
Where maneuverability is necessary, propane forklifts are the most suitable. Not like a car, a forklift makes use of its rear wheels to pivot, which enables the forklift to quickly pivot on a tight radius.