HOW TO INSTALL WHEEL-CHECKS PROPERLY
1. Torque wheel nuts to proper specifications (recommended ft/lb).
   
2. Ensure correct size by measuring unit from flat to flat (see picture on top right),
   
3. Place one Wheel-Check over each nut with the raised collar resting against the wheel. Push with both thumbs or a socket flush to the wheel.* (see picture on right).
   
4. For disc wheel, point the point to the center following stud (photo 1).
   
5. For other wheel types (spoke pattern), point indicators towards the hub (photos 2 and 3).
   
* STEP #3 IS VERY IMPORTANT FOR CORRECT INSTALLATION.
THE DRIVER WILL DO THEIR WALK-AROUNDS BY LAW. If a nut has backed off as little as 50 ft-lb, the driver can notice if he observes closely. Once the nut has backed off 100 ft-lb, the movement is easily noticeable.

INSTALLATION OF RED WHEEL-TORQUES. If the driver notices a nut has moved, the driver would remove the yellow Wheel-Check, retorque the loose nut and then replace with a red Wheel-Torque. This would identify the loose nut to the maintenance shop at a simple glance and they will know that the whole wheel must be carefully serviced.

Most of the inspection stations know this system and will realize that the driver is aware of the loose nut and will pass him through to go to a maintenance shop.

If the Wheel-Checks have not moved, this means that the nuts are secure and safe. No torquing is required which means less tear on the nut and valuable time and money is saved.