Brakes on 11th Series Super 8

Posted by Odd Moen On 2012/6/17 3:05:25

The Service Letters says that the brakes shoes are marked with "S" (Secondary) and "P" (Primary) and shall be assembled in a definite location. I can not see any difference at all between these to type of shoes! Is it right? The service letter mention that there are different types of brake lining and the "S" and "P" brake shoes. Do somebody know the reason for that? Today I think we will have the same type of lining on both shoes?