Hi. Photos attached. I began to repair the pump on my Seneca Aspen, but I'm stuck. I used the only instructions I've found (copied below). The photos reflect having completed Step-2. As to the second part of Step-3, the plastic ring that must be spread is described as being at the "top" of the clear tube. I found that spreadable ring at the muzzle end. So, I suppose that the plastic piece to be unscrewed is at the "bottom" of the clear tube. Unfortunately, neither the gun itself or the assembly diagrams I've examined show any evidence of something plastic that might be unscrewed at the 'bottom' or top of the tube. I've turned that plastic piece (in relation to the tube), but no sign of screw action. It is quite tight to turn. I've tugged and twisted quite vigorously, thinking both ends of the tube might be a friction fit, but neither end has moved. I need to get that piece nearest the trigger off the plastic tube, then the end nearest the muzzle. How?
De-gas your rifle first!
1. Take your 6 Allen head screws out and remove both forearm pieces.
2 remove linkage pin and circlip for the pump arm and the 4 Allen bolt at bottom of metal tube closest to the trigger and slide arm and tube off letting the linkage slide through the tube.
3. Unscrew the black piece on the bottom of the clear plastic tube (CC). At the top of the clear tube there is a plastic ring that will spin easily. Remove by spreading it and slide it off. Then remove the pump piston pin under it and slide clear tube off.
4. Slide the piston rod up and unscrew the brass piece (CC) that holds the piston rod in and slide the piston out. Clean, Replace the seal and reassemble using silicone grease.
This sounds hard but is very easy to do. I hope this helps.
The problem o-ring is the small buna #006 duro75 oring.
De-gas your rifle first!
1. Take your 6 Allen head screws out and remove both forearm pieces.
2 remove linkage pin and circlip for the pump arm and the 4 Allen bolt at bottom of metal tube closest to the trigger and slide arm and tube off letting the linkage slide through the tube.
3. Unscrew the black piece on the bottom of the clear plastic tube (CC). At the top of the clear tube there is a plastic ring that will spin easily. Remove by spreading it and slide it off. Then remove the pump piston pin under it and slide clear tube off.
4. Slide the piston rod up and unscrew the brass piece (CC) that holds the piston rod in and slide the piston out. Clean, Replace the seal and reassemble using silicone grease.
This sounds hard but is very easy to do. I hope this helps.
The problem o-ring is the small buna #006 duro75 oring.
