Post
by Graeme » Wed Jan 23, 2019 3:00 pm
Hi,
This from the current MOT guidelines testing stations have to follow:
You can use a blunt instrument to open a cut in the tyre to check for exposed ply or cord as long as you don't cause further damage.
When assessing cuts in a tyre, it is permissible to check whether a cut is deep enough to reach the play or cord by using a blunt instrument to open the cut taking care not to cause further damage.
The following criteria should be used when assessing a cut in a tyre:
any ply or cord that can be seen without touching the tyre – fail
if by folding back rubber or opening a cut with a blunt instrument, so as not to cause further damage, exposed ply or cord can be seen irrespective of the size of the cut – fail
if a cut which is more than 25mm or 10% of the section width whichever is the greater, is opened with a blunt instrument and cords can be felt but not seen – fail
Before failing a cut, you must make sure it's the cords that you can feel not a foreign object. If you're not sure, then you should pass and advise.
When assessing lumps or bulges in a radial ply tyre, care should be taken to distinguish between normal undulations in the carcass, resulting from manufacturing, and lumps or bulges caused by structural deterioration.
So as already said, what does the wording on the certificate say? Testers now have to categorise faults as Dangerous, Major or minor. Dangerous is an automatic fail!
Hope this helps,
Graeme
Just after Christmas isn't the best time to get a bill for 4 though !
Never anthropomorphise computers. They hate that.