Power
Numerous forklifts are made to operate on propane gas. Forklifts which use propane are 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 then the vapor mixes with air. The throttle of the forklift is used to be able to control the flow of vapor. A spark plug fires up the vapor and air mixture producing pressure which moves the pistons. The pistons power the hydraulic pump and turn the wheels.

Propane powered forklifts are recommended for use in warehouses and other buildings because they are clean burning with low emissions.

Hydraulics
The forklift's hydraulic system is what allows it to lift and move very heavy stuff from place to place. Cylinders, a pump and tubes make up the hydraulic system. The pump forces dense fluid in the tubing and into the cylinders. The build up of pressure 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
Propane forklifts work well where maneuverability is needed. Unlike a car, a forklift makes use of its rear wheels to pivot, which allows the forklift to turn quickly on a tight radius.