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 />
43<br />
STEERING LINKAGE<br />
Method of <strong>Testing</strong><br />
1. With the road wheels on the ground and the steering wheel rotated clockwise and anti-clockwise against the road resistance,<br />
examine the steering mechanism from the point where it is secured to the chassis to the point where the steering arms are<br />
secured to their fixings. For vehicles fitted with power steering, it may be necessary to have the engine running.<br />
During this inspection check for:<br />
(a) excessive wear at joints.<br />
(b) fracture of or damage to components.<br />
(c) insecure components.<br />
2. With steered wheels off the ground (using the vehicle manufacturer’s recommended jacking points):<br />
(a) check for fouling of wheels, tyres and components of the steering linkage with any part of the vehicle by rotating the<br />
steering wheel through its full working range and also by examining likely fouling points for abrasion.<br />
(b) while the steering wheel is being rotated, also check the steering column shaft and steering box/rack for stiffness or worn<br />
or damaged bearings.<br />
(c) note the amount of movement between the axle beam and the stub axle whilst each wheel in turn is rocked. Alternatively<br />
a wheel play detector device may be used.<br />
(d) note the amount of upward movement of the stub axle, whilst each wheel in turn is lifted with a bar placed underneath it.<br />
(e) examine visible parts of the stub axle for condition and security.<br />
(f) where possible, examine the king pin retaining device.<br />
3. For Integral Power Steering;<br />
Check by the feel on the steering wheel that the power steering is operating by rocking the steering wheel with the engine<br />
running and the road wheels on the ground.<br />
NOTES<br />
1. All steered axles are to be examined.<br />
2. If power steering is optional on the vehicle type concerned, and is fitted to the particular vehicle but has<br />
been disconnected in such a way that it can have no adverse effect on the manual steering, this should<br />
not be regarded as a defect.<br />
3. Welding of steering parts other than by a manufacturer is not acceptable.<br />
69
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