NCT Manual. - National Car Testing Service

14
STEERING WHEEL PLAY
NATIONAL CAR TEST (NCT) MANUAL 2012
Method of Testing
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With the road-wheels in the straight-ahead position, lightly turn the steering wheel to the left and right as far as possible and
note the amount of free play before the road-wheels move. (If power steering is fitted the engine should be running).
Attempt to lift the steering wheel in line with the steering column and note any movement at the centre of the steering
wheel or the steering column.
Push steering wheel away and pull it towards your body, and note the movement of the steering column and its
security of mounting.
Examine the universal joints/flexible couplings for wear, security or deterioration.
Examine steering lock where fitted (see Item 15 for reasons for failure).
Check the presence and security of retaining and locking devices.
NOTES
1. Where a steering mechanism is fitted with flexible couplings care must be taken to distinguish between
play due to wear, and apparent play due to the construction of the mechanism.
Steering Box
ITEM
1 Excessive rotational play (20°).
REASONS FOR FAILURE
Rack and Pinion
Steering Wheel/Column/Shaft
Universal Joint/Clamp
Retaining and Locking Devices
2 Excessive rotational play (5°).
3 Excessive end float, insecure, broken.
4 Bushes/Bearings/Mounting brackets missing,
worn, damaged or insecure.
5 Shear pin in telescopic column broken.
6 Damaged, worn, insecure or badly deteriorated.
7 A retaining or locking device missing or insecure.
NOTE ON ROTATIONAL PLAY
Steering Box
20° on 15” (381mm) diameter wheel = 67mm on rim
20° on 18” (457mm) diameter wheel = 80mm on rim
Rack and Pinion
5° on 15” (381mm) diameter wheel = 17mm on rim
5° on 1 8” (457mm) diameter wheel = 20mm on rim
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