The lift truck's turning radius is also referred to as the turning circle, which is vital information for the driver to have. It gives the operator the knowledge of how much space is needed to turn the lift truck around. For example, a tighter turning radius allows the machinery to work successfully in crowded areas and tight places, thus enhancing the maneuverability of the lift truck. Drivers who are not aware of this measurement may cause damage to the property or to the machinery.
Make the necessary steering geometry alignment corrections prior to testing the turning radius. The test must start with an operator trainer assisting in the cab where they can help to control the equipment's functions. A second individual on the ground utilizes a hose or a spray bottle to wet the inside and outside of the unit's wheels. Next, drive the machine in a whole circle with the wheels turned to the maximum angle. Repeat the procedure once and if necessary, continue 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 exterior tires from the circle's one side to the circle's opposite side. You could establish the inside turning radius by stretching the tape measure across the circle left by the inner tires. After that, divide these numbers in 2 in order to establish the turning radius. Be sure to note that the turning center is the midpoint of the circle's diameter.
Drop a plumb line from the extreme outside radial extension on the equipment in order to establish the wall-to-wall turning diameter. Once this is accomplished, next find the point on the pavement directly beneath. This point to the turning center indicates the machinery clearance radius. As a rule, wall-to-wall turning diameter is twice the clearance radius of the machine.