WHEELS AND TYRES 16 4X4 WITH SPARE 4X4 WITHOUT SPARE IV. WHEEL RUN OUT Wheel run - out is because of poor bead seating on the rim. Poor bead seating is usually the result of improper mounting or the use of improperly made wheels. Basically there are two types of run-out: a. Radial run-out: An "out-of-round" situation where vibrations are produced as the wheel spindle moves up and down. b. Lateral run-out: A side-to-side or wobbling movement of the tyre and wheel. Procedure to perform a wheel lateral and radial run out check is as given below: 1. Mount the wheel on the vehicle or wheel balancer. If on the vehicle, properly lift and support the vehicle such that wheels can turn freely. 2. Position a dial indicator on a rigid fixture. 3. For lateral run out check, position the indicator point horizontally against the side of the wheel rim flange. For a radial run out check position the indicator point vertically against the tyre mounting surface of the wheel rim flange. 4. Slowly rotate the wheel one full revolution while observing the dial indicator. 5. Rotate the wheel to the position where the lowest dial indicator reading was obtained. 6. Zero out the dial indicator. 7. Slowly rotate the wheel one full revolution while observing the dial indicator. 8. Record the highest dial indicator reading. Disregard any indicator readings caused by welds, paint runs, scratches etc. 9. Perform lateral and radial run out checks on both inboard and outboard sides of the wheel.
RkJQdWJsaXNoZXIy MTIwNTUz