GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: Cody2306 on November 21, 2016, 07:23:12 PM
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I recently fixed my Benjamin pump by replacing some prongs... Then I put a war valve in mrod and a 12.5 hammer spring.. but when putting everything back together I stripped out my gauge port.. so I ordered a new one got everything back together and now it's not even hold any air at all ... Where do I start.....I undid the foster plug thing and hooked it up to the pump and I can feel air being pushed threw so IDK... Please help guys
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Probably knicked and oring on the valve or gauge block.
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I just put new orings on gauge and valve but I'll open her up and check again
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.
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I'm starting to think it's not the rifle... Because it started to hold air after I took the stock off . I had decided to try one more time before I took the valve and everything else to do a check... And it held a bit of air and I dry fired it and on the second dry fire it sounded like it let a lot of air out and now it won't hold air again
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Fill it up and use soapy water to spray around the fill probe and gauge area to see if you can find the leak.
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Sounds like a valve issue...poppet not sealing. Was this on a full 3K fill? You can't let the air pressure below a recommended point with most modified valves.
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OK its not the air pump... I've got the air tank off and I tried pumping it by itself and the air is going straight out the transfer tube or port
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See above post...
:)
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With the reservoir off and no hammer/trigger group, reach in and work the poppet 2-3x and let it pop back out by the spring. This MIGHT help it seat again.
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OK I will try that... What is the poppet and do I need to take the war vAlve apart and check something
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(http://gunnutt.com/images/002_0276.JPG)
THIS is a factory valve (the one on top) and shows the poppet, the stem sticking out of the end. You should be able to access the poppet stem without taking it out again. The poppet is spring loaded. You should be able to push the stem in a bit and release it quickly and it will pop-pet back in place.
:)
Work it 2-3x like that to make sure it seats.
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Cody,
Cock the gun before trying to fill it with your hand pump.
It sounds to me like the hammer tension on the poppet is holding the poppet open when there is no pressure in the reservoir .
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Hey guys did exactly what y'all said and I it's holding It again thanks..
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Hey guys did exactly what y'all said and I it's holding It again thanks..
You are welcome. We are always here to help fellow airgunners.
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Hey guys did exactly what y'all said and I it's holding It again thanks..
You are welcome. We are always here to help fellow airgunners.
OK one more thing... It's holding air now... So I filled up to 2000 Psi and took one shot and way too much air came out .. it went threw 1000 Psi.... Is this a tuning issue or something else
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2000 psi and 12lb spring sounds like you have wayyy too much hammer tension/strike too me... but I am certainly NOT an expert here.
Possibly even a sticky hammer (?).
Did you polish the inside of the tube when you had it apart ?
Deburr the inside edges ?
Did you use some sort of grease on or around the hammer ? ( it shouldn't need much, if any).
I would contact Travis and ask him what he would recommend as a tension setting.
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What's the best way to get a hold of him
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BEST way is a phone call. It's what Travis prefers.
http://wickedairrifles.com/index.html (http://wickedairrifles.com/index.html)
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What's the best way to get a hold of him
http://wickedairrifles.com/index.html (http://wickedairrifles.com/index.html)
oops, The Boss beat me to it ;) ;D
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2000 psi and 12lb spring sounds like you have wayyy too much hammer tension/strike too me... but I am certainly NOT an expert here.
Possibly even a sticky hammer (?).
Did you polish the inside of the tube when you had it apart ?
Deburr the inside edges ?
Did you use some sort of grease on or around the hammer ? ( it shouldn't need much, if any).
I would contact Travis and ask him what he would recommend as a tension setting.
Bingo. Way to much strike at to low a pressure. Fill to 2800 and use a stock spring
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Old pro knows the Mrod. To much hammer spring can cause many issues.
I have experienced some guns when completely empty that just will not seat the valve with the a compressor.a the Freedom. This is due to no high flow of air pressure and air volume t seat the valve. Even with the slow flow JB tank a no fill. Right out the barrel. Cocked gun and all. No hammer pressure at all. New or old exhaust or poppit valve.
I keep a small emergency SCBA 3000 psi rigged for a direct blast. The direct blast seats the valve using little air out of the emergency tank. After that I direct fill from the JB Tank or compressor. Fire a few dry fires and check for leaks. Then with no leaks fill the gun up. Shoot the gun and refill and let sit overnight or longer and check for leaks. Just because you have no leak at 1500 psi does not mean at higher pressures you will not see on at 3000 psi and the higher you go things change.
But many will take the hand pump or the compressor right from the dead start even when you never remove the valve.
Also a word of caution on bubble tests. Some liquids will seep into areas and cause severe rust. Esp on the Mrod air gauge area where it will seep in the void of the orings. It will be trapped by the orings and cause reinstall of new o rings if not corrected prior to reinstall.
Many non corrosive indicators out there.👁
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Good points. My last ditch effort is submerse a charged cylinder in plain water in the tub. No matter what I use I always blast it totally with compressed air and wipe everything down with a spritz of Ballistol. But you're right, some liquids that seep into areas and left to stand could cause problems.
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My next purchase...
https://www.amazon.com/Oatey-45801-Hercules-Detector-8-Ounce/dp/B009Y9ZT5E (https://www.amazon.com/Oatey-45801-Hercules-Detector-8-Ounce/dp/B009Y9ZT5E)
(https://images-na.ssl-images-amazon.com/images/I/71ic414ZgHL._SL1500_.jpg)