FX 400 Breech Probe Seal

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cahil_2

cahil_2

Member
Apr 16, 2015
1,226
484
Whitehall MI, United States
Went to the dairy farm this morning to shoot some starlings and when I went to load my FX 400 the breech o ring stuck to the probe and pulled out. Went home and inspected it and there were no cuts, so put it back in and lubed with some silicon spray. Two things; does anyone know why it might have stuck to the bolt probe, and does anyone know an easy way to install them. That was no easy task to reinstall. Gonna order some extras Monday.
 
Cahil, I had mine blow out the other day. It ended up on my shooting bench. I'm pretty sure I was using my magazine at the time so when it blew it probably rolled back on the pellet probe until I cycled it and then I think it fell out on my bench. The breech seal seems to be a problem with the 400's. Get some 009 70 durometer for spares until you can get some factory O-rings. Had you noticed the gun getting louder at the breech on previous shots? The wooden dowel rod inserted down the barrel and used as a back up to keep the O-ring from working it's way past the barrel groove is the best bet. If you don't have the dowel rod it can be a real pain to put back in. No need to remove the barrel. Use something like a broken tooth pick or something small and plastic to help maneuver the O-ring into the groove while keeping it in place with the dowel. As mr.grimm stated 3/16 is the correct size dowel rod.
Jimmy
 
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"jking"Cahil, I had mine blow out the other day. It ended up on my shooting bench. I'm pretty sure I was using my magazine at the time so when it blew it probably rolled back on the pellet probe until I cycled it and then I think it fell out on my bench. The breech seal seems to be a problem with the 400's. Get some 009 70 durometer for spares until you can get some factory O-rings. Had you noticed the gun getting louder at the breech on previous shots? The wooden dowel rod inserted down the barrel and used as a back up to keep the O-ring from working it's way past the barrel groove is the best bet. If you don't have the dowel rod it can be a real pain to put back in. No need to remove the barrel. Use something like a broken tooth pick or something small and plastic to help maneuver the O-ring into the groove while keeping it in place with the dowel. As mr.grimm stated 3/16 is the correct size dowel rod.
Jimmy
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as mentioned above, the wooden dowel down the barrel allows for fairly easy seating of the Oring in the groove. It takes a bit of patience the first few times but once you get the technique down it becomes very simple and straightforward.

 
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