I forgot to attach a label indicating the date of pump replacement -> will do this at the next opportunity. Also, I had started the instrument air compressor for use with the pump cart's pneumatic isolation valve but didn't de-energize this until after 1400 hrs. local.  The Y-end instrument air pressure will decay slowly and will remain "RED" until pressure falls below ??? threshold.   Operators please ignore the "RED" MEDM field.