GTA
Airguns by Make and Model => Benjamin Airguns => Topic started by: TheBullsEye on April 06, 2018, 10:02:55 PM
-
Hey guys I am fixing a 392 Benjamin pump and I coming let KT resealed it put it back together and when I pump it air gets pushed out the barrel what am I missing did I assemble the valve wrong or is the valve spring weak?
-
Is the 392 one that needs the bolt cocked before pumping ?
-
I tried that it’s like the air is leaking around the valve or something ? When I pump if I put my finger over the barrel the back pressure leaks by the trigger or that’s what it sounds like ?
-
Nope sounds like something isn't sealing right or sticking , maybe try a flush ?
-
Flush? Not familiar with that term I tried the old seals back on the valve those were fine not nicks or anything and it still leaks I did a light film of clear tar on the valve and orings still doesn’t seal is my tube ovel maybe?
-
Put rubbing alcohol in the pump area and pump it through the gun it will help free up any contaminates, that could cause a valve to stick, if that doesn't help another tear down is in order.
-
I’ll try flushing it ive left it apart so I don’t gotta drive those dang roll pins out over and over
-
I dont put rollpins back in until I know gun will function....I use small bolt in place of pin...good luck
-
Yes I bought a kit to reseal it . I got it to pump last night by pumping short rapid strokes until I felt pressure and didn’t hear air leaking through now it seems to work so I put a few pumps in and let it sit over night
-
I’m sure u know a new brass valve from Crosman is $12.00...I’m waiting on one now.... ;)
-
Was there one spring in the valve or two?
If two then the normal looking spring goes in the front of the valve against the check valve. Then a washer.. then the conical spring with the small end facing the rear of the valve against the poppet.
-
wellbi was up at Trenier outdoors today and we grabbed some pelligun oil dumped her in and it sealed right up so I guess problem solved