Yes, line will have to be removed from vehicle, cut below the bend and solder a 90 degree spring lock fitting onto line, another way would be to cut just below bend and solder ( aluminum rod) a new 90 with spring lock fitting, depends on length of male SL from bend.

sometimes this problem is caused by guage set, this can be diagnosed if still in vacuum by static charging thru high side (with engine off) refrigerant should go thru high side and low side guage will rise, another way to tell if guage set ok would be when system is in a vacuum loosen low side hose ...