Checking the axial clearance of the front wheel hub bearings using the 02.7834.9505 tool
1 – indicator; 2 – bolt; 3 – bracket; 4 – wheel hub
1. To check the clearance, lift the front of the car, support it on a stand and remove the front wheels. Install the 02.7834. 9505 device under the wheel mounting bolt. Press the indicator leg against the end of the steering knuckle axis with the arrow in the zero position and, moving the hub along the steering knuckle axis, measure the amount of movement (clearance) using the indicator.
2. If the gap is more than 0.15 mm, adjust it.
3. Loosen the adjusting nut from the steering knuckle.
4. Install a new nut or a used one from another vehicle, tighten it to 19.6 N·m (2 kgf·m), while turning the hub in both directions two or three times to self-align the bearing rollers.
5. Loosen the adjusting nut and retighten it to 6.8 N·m (0.7 kgf·m).
6. Make a mark B on the washer, then loosen the nut by 20–25° so that edge A does not quite reach mark B.
7. Lock the nut in this position by pressing the notches on the nut neck into the slots on the end of the steering knuckle axle.
8. After adjustment, the clearance in the bearings should be within 0.02–0.08 mm. When adjusting the clearance, it should be taken into account that the direction of the thread on the left pivot pin is right, and on the right pivot pin, it is left.