Hi there,
Have been having a dig about and found this info on the T2 starter relay, not strictly overhaul information but it does contain servicing and testing information.
Ap4343c Vol1 Bk2 Sec3 t2 Relay 5cw_4321
Hope that helps
I’ll see if I can have a dig around in AP1086 to see what I can find in there too.
Regards
Dave