MAINTENANCE
Jacking up the car
When removing the roadwheels it is recommended that the jack supplied with the car is used. At the front or rear, the extension of the jack is fitted into the square sectioned recess just beneath either bumper.
When a trolley jack is used, jack up the rear of the car by positioning the jack head beneath the rear axle casing.
Jack up the front of the car by positioning the jack head and a 2 ft. (61 cm) long wooden beam across the car beneath the front suspension cross member; If this procedure is not observed, the steering unit may foul the cooling fan.
Repositioning tyres
Tyres complete with rims should be interchanged at regular intervals. Fig. I shows three different ways of carrying out this change.
Diagonal Interchanging between left-hand front and right hand rear and between right-hand front and left-hand rear provides the most satisfactory first change because it reverses the directions of rotation. Subsequent Interchanging of front and rear tyres should be as indicated by their appearance with the object of keeping the wear on all the treads even and uniform.
Inflation pressures
Tyres should be examined regularly, preferably once a week for loss of pressure. Pressures should be checked when the tyres are cold, such as after standing overnight, and not when they have attained normal running temperatures. Do not over-inflate, and do not reduce pressures which have increased owing to altered tem-perature.
The correct, Inflation pressures are given in the General Data Section.
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Tyre damage
Tyres should be examined at regular intervals for small objects embedded in the treads, such as flints and nails; also for cuts and penetrations, and for damage due to impacts with kerbs, etc.
Minor injuries confined to tread rubber, such as from small pieces of glass or road dressing material, require no attention other than the removal of the objects.
More severe tread cuts and wall rubber damage require vulcanised repairs.
Injuries which extend into or through the fabric, except clean nail holes, seriously weaken the tyre. Satisfactory repair necessitates new fabric being built in and vulcan-ised. This requires expensive plant equipment and should be undertaken by a tyre repair specialist or by the tyre maker.
Oil and grease
Oil and grease should be removed by using petrol sparingly. If oil or grease on the tyres results from over-lubrication or defective oil sealing, suitable corrective action should be taken.
Uneven tyre wear
All tyres should be examined at regular Intervals for uneven wear.
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