The lift truck's turning radius is also called the turning circle, which is essential information for the operator to have. It gives the operator the information of how much space is required to turn the lift truck around. For instance, a tighter turning radius enables the machine to successfully function in crowded areas and restricted places, thus improving the maneuverability of the forklift. Drivers who do not know this measurement could cause damage to the property or to the machinery.
Make the necessary steering geometry alignment corrections before testing the turning radius. The test should start with an operator trainer helping inside the cab where they can assist to control the machine's functions. Another person on the ground utilizes a spray bottle or a hose to wet the outside and inside of the model's wheels. Then, drive the equipment in a complete circle with the wheels turned to the maximum angle. Repeat the process once and continue if necessary to wet the wheels.
Once this measurement test has been accomplished, measure the watermarks left by the tires using a tape measure, from the midpoint of the tire mark to a similar point across the diameter of the circle. For the outside turning diameter, measure the watermark left by the outside tires from the circle's one side to the circle's opposite side. The inside turning diameter can be established by stretching the tape measure across the circle left by the inner tires. After that, divide these numbers in 2 to be able to establish the turning radius. Be certain to note that the turning center is the midpoint of the diameter of the circle.
To be able to determine the wall-to-wall turning diameter, drop a plumb line from the extreme outside radial extension on the vehicle. After this is done, the next step is to find the point on the pavement directly beneath. This point to the turning center indicates the vehicle clearance radius. As a rule, wall-to-wall turning diameter is two times the vehicle clearance radius.