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Keeping the wheels on
Page 14
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DUNLOP has produced the second in its series of Usercare pamphlets entitled Truck Wheels and Fixings The growth in sales of foreign manufactured vehicles in Britain during recent years has accentuated the principal sources of danger, which are said to be cracks and fractures in the wheel centres caused by tightening mis-matched conicalfaced wheel-nuts against spherical machined countersinks in the wheel, or vice-versa.
A second problem stems from this type of mis-match. The nuts can never be correctly tightened and will eventually work loose.
The pamphlet sets out to explain in simple terms the difference between the three main types of commercial vehicle wheel fixing in common use in the UK. Stud and nut dimensional data is provided to identify the system used by individual manufacturers.