Benjamin Gauge hole debur... what went wrong?

[HVAC.Supertech]

This was a brand spank'n new P-rod, never been fired, my neighbor gave it to me. It was made in 2018 so I decided to order everything new from Tim Hill and rebuild it (105 kit, hammer, springs, PEEK striker, depinger, moderator, gauge block, and gauge). I rebuilt it, shot hundreds of rounds through it over the last 2 weeks, developed a leak, took it apart and when I did this happened. I met resistance when pushing it out, not sure what happened.

My question is can I just buff out the gouges with Cratex (fine carbide in a rubber matrix), re-gasket and re-install?

 

[Dr. Kralenstein]

Those surfaces are below the o-ring height so shouldn't leak. Doesn't look like it got into the threading of the gauge either.

I've scratches up a few valves when working on them. Never have an issue as long as the tube inside isn't damaged and the rings can still seal.

 

[Ta-Ta Toothie]

A must for your tool box.

Amazon.com

 

[Ta-Ta Toothie]

These are specifically for holes, but you can do fine with the general use tips.

Amazon.com

 

[kayaker]

^^^^^^ What Ta-Ta Toothie suggested, I did all my marauders when I had to reseal them.

 

[kayaker]

After you clean up that burr they do sell a special tool (plastic piece) that slips into that pressure gauge hole and it sets flush with the inside of the tube so a less of a chance of screwing up the o-rings. Just a suggestion for ya.
Dr. Kralenstein is right about the o-ring height. I'd be more inclined to look at the fill port or the pressure gauge area, if the gauge is tighten to much that will make a leak. Did you run soapy water or leak tech around any areas of the air tube ?

 

[Ta-Ta Toothie]

Gauge port hole filler tool for for Benjamin Marauder air rifles. Marauder. Benjamin. Mrod, M-rod, crossman, archer airguns.

Gauge port hole filler tool for for Benjamin Marauder air rifles. Marauder. Benjamin. Mrod, M-rod, crossman, archer airguns.

www.archerairguns.com

Finger also works.

 

[HVAC.Supertech]

After staring at the picture, isn't it strange that the gouges are in the middle of the assembly? I think something hard found its way into the gauge port area when I started pushing it all out. Or I could have missed a booger around the lip and it broke itself off.

The reason I think this is because I debur'd the gauge hole with a tapered stone first and followed it with Cratex (fine carbide in a rubberized matrix) to polish it out.

Gauge port hole tool has been ordered!

 

[HVAC.Supertech]

Here is a picture of the Cratex grinding/buffing wheels I use. I have a small machine shop and use these regularly for profile work. You can shape them with a die grinder and an old crappy file.

 

[Ta-Ta Toothie]

If you got a bore scope, send it down the tube.