sorry Oldman I love comment as to young but Im retiremet age and yes I worked on Amleet and SPV's.
So lets get back to your qualifications ............................................
No tread brake here: http://www.railpictures.net/viewphoto.php?id=206754
They started installing single shoe tread brakes on each wheel of Amfleet around 1980. Each tread brake unit had it's own brake cylinder, levers and brake shoe. It was to help keep the wheel profile in good shape and stop a "false flange" from forming.
-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/)
"Acela" car truck, air bag suspension, air bag and bearing temperature monitoring.
Don U. TCA 73-5735
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