06-05-2020, 07:06 PM
Thanks to a photo on Facebook today and some research in the archives I have know managed to find out what is different in regards to the rod brake handbrake.
It is the bracket on the chassis.
Rod brake handbrake bracket (ignore the bracket in the red outlineline, it is the bracket the handbrake pivots on I want to highlight):
Rod brake handbrake set up..jpg (Size: 70.29 KB / Downloads: 265)
This is the one as fitted to non-rod braked cars (the lower part is at a different angle and the bottom fixing is rounder):
IA 5197 was introduced in 1930 along with coupled brakes, and ran until...
Screenshot 2020-05-06 at 18.38.34.png (Size: 89.95 KB / Downloads: 265)
In introduction of Rod brakes when 1A5646 was then used (unfortunately the same drawing was used for both in the parts list - never a good source for identification of physical changes in my opinion).
Screenshot 2020-05-06 at 18.38.34.jpg (Size: 26.87 KB / Downloads: 267)
Very pleased that I have a solution and also to have learned (yet) another difference in production.
It is the bracket on the chassis.
Rod brake handbrake bracket (ignore the bracket in the red outlineline, it is the bracket the handbrake pivots on I want to highlight):

This is the one as fitted to non-rod braked cars (the lower part is at a different angle and the bottom fixing is rounder):
IA 5197 was introduced in 1930 along with coupled brakes, and ran until...

In introduction of Rod brakes when 1A5646 was then used (unfortunately the same drawing was used for both in the parts list - never a good source for identification of physical changes in my opinion).

Very pleased that I have a solution and also to have learned (yet) another difference in production.