GTA

All Springer/NP/PCP Air Gun Discussion General => "Bob and Lloyds Workshop" => Topic started by: PGunner on May 27, 2021, 10:30:05 AM

Title: Reseal every thing in the pump tube
Post by: PGunner on May 27, 2021, 10:30:05 AM

Should the tube be honed at all?
Should I deburr the pump end?
Is there anything else I need to pay attention to?

Title: Re: Reseal every thing in the pump tube
Post by: rsterne on May 27, 2021, 12:52:32 PM

You don't say what kind of gun you are talking about.... If you do, I can move this thread where you might get the most responses, if this gate is not appropriate....

Bob

Title: Re: Reseal every thing in the pump tube
Post by: PGunner on May 27, 2021, 06:06:36 PM

Sorry about that.
Crosman 1377 being moded into a 1322.

Title: Re: Reseal every thing in the pump tube
Post by: rsterne on May 27, 2021, 08:22:18 PM

I have never honed the tube on a 13XX.... I always deburr the pump slot carefully, however, so that it doesn't cut the pump cup.... I also deburr the holes in the front of the tube where the pivot pin goes, they are notorious for taking a chunk out of the cup.... If you are going to be taking it apart often, I suggest you lose the split pin and install a smooth one.... Not only does the split pin chew up the holes in the tube, it wears out the hole in the pump linkage....

Bob

Title: Re: Reseal every thing in the pump tube
Post by: PGunner on May 28, 2021, 07:04:14 AM

split pin replaced a few mo. ago didn't know about the front hole.
Going to do the pump slot and the front hole.
Thanks

Title: Re: Reseal every thing in the pump tube
Post by: PGunner on May 29, 2021, 11:26:01 PM

A lot more work than I thought but it is back together and working. My first real mod on any gun but I think it is worth it.