This new issue of SU 448A includes the following changes:
Added requirements for flexible connecting shafts.
Revised Endurance and Starting Cycle Test.
Updated Oven Aging Test Temperature Selection.
Revised Marking and Installation Instruction requirements.
Change title from "Flexible Couplings for Connecting Fire Pumps to Drivers" to "Flexible Couplings and Connecting Shafts" for Fire Pumps"