Returning to where he left off at the end of Saturday's spacewalk, Doug Wheelock was able to close and demate the quick disconnect valve on the final fluid connector leading into the failed pump module.
Seeing only some small ammonia "snowflakes" and no visible leaks, Wheelock was given the go by Mission Control to press ahead with demating the M3 connector rather than proceed first with isolating the coolant flow upstream, as had been the plan prior to the spacewalk beginning.
Shaking the connector to break free ice that had built up inside the valve and using a tool to forcefully pry it off the pump, Wheelock successfully demated the M3 line at one hour and 56 minutes into the spacewalk.
Having averted the need to first isolate and then vent the line, the spacewalkers were about 35 to 45 minutes ahead of schedule. They are now focusing on disconnecting five electrical and data cables and four bolts from the failed pump, enabling its removal.