NCT Manual. - National Car Testing Service
NCT Manual. - National Car Testing Service
NCT Manual. - National Car Testing Service
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NATIONAL CAR TEST (<strong>NCT</strong>) MANUAL 2012<br />
44<br />
WHEEL BEARINGS<br />
Method of <strong>Testing</strong><br />
APPLIES TO ALL ROAD WHEELS<br />
Raise the axle(s) of the wheels being examined so that they are clear of the ground.<br />
1. Note the movement of the wheel relative to the axle or stub axle in order to assess the play in the wheel bearings, whilst each<br />
wheel in turn is rocked.<br />
2. Spin each wheel rapidly and listen for any roughness or harshness in the bearings.<br />
3. The vehicle should be failed if a distinctive rumble or growl is heard that indicates the bearing is worn or damaged.<br />
ITEM<br />
Wheel Bearings or Hub<br />
REASONS FOR FAILURE<br />
1 Obviously too much play.<br />
2 Too tight.<br />
3 Bearings or hub are worn or damaged.<br />
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