Educating the motoring public of the importance of correct wheel alignment geometry set up, for our left hand drive cambered roads unique to Australia. Most mass produced vehicles brought into Australia have been designed for a world wide market, cars, trucks etc. Most of the world drives on the right hand side of the road and their roads are flat. Truck axles need to be removed from the vehicle and have the camber and castor corrected in an axle press to stop pull left and left hand outer camber wear.
4WD’s with closed knuckle front diff assemblies e.g. Toyota and Patrol don’t have any camber or castor adjustment. The fitment of an aftermarket castoline kit, which is an offset knuckle bearing will remedy the poor camber and castor settings.
In the case of Trucks, test drive your vehicle and make sure it doesn’t pull left, or request that your vehicle be checked by a wheel alignment specialist before sale. This will save you a lot of arguments with dealers and unnecessary early tyre replacement.
Poor life and irregular wear on heavy vehicle tyres is a problem which is often aimed at the “tyre” and it’s quality. The vehicle geometry
is hardly ever suspected and the usual comment “it’s a new truck – it cannot be out”, is often heard.
However frustrating it may be this attitude rarely solves the problem. If you consider the alignment geometry of the vehicle, there are other factors which will have quite an influence on tyre wear.
Tyres are designed to generally run “straight", whether steering, driving or being trailed, they should be aligned parallel to the geometric
centerline of the vehicle and perpendicular to the road surface. When these settings are followed and the usual parameters adhered to
dramatically improved tyre life results. Compounding the problems associated with alignment geometry are the variations in road camber or
“Crown” on Australian Roads. Freeways are cambered to 2 degrees, many modern highways are cambered to 3 degrees, with rural and country
road are cambered up to 5 degrees.
EADIE’S Mechanical has state of the art equipment to make in and out of vehicle, camber and castor corrections. EADIE’S Mechanical can first check the vehicles currents settings and advise you of any adjustments or if any suspension components require repair before a final wheel alignment is performed.
Camber and Castor specifications are not the only cause of tyre wear, if your vehicles suspension is in need of repair this can also be a cause of concern, (See Suspension). EADIE’S Mechanical recommends, after a suspension repair, replacement or upgrade that your vehicle alignment settings be checked and set to the vehicle optimal specifications, for smooth, even and stable ride.For a proper diagnostic on your vehicles wheel alignment, contact the team at Eadies Mechanical on (07) 5464 3413