You didn’t mention which style you are working on. The new style 880 has a stamped area on the frame rail that holds the pump tube in place. The old style has a pin that goes through the bottom of the pump tube.
jlmissouri – It is the old style 880. Thanks! I will have to check to see if that pin is out of place or missing. I can see where the pump tube has a slit that looks like something should be holding it in place, but perhaps I am missing the pin and the tube has rotated a little bit. Unsure.