GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: turbonoma on November 02, 2012, 04:08:42 PM
-
Today I decided to go out play with the prod and that ended quickly. I was filling the air tube and just about when it was reaching 2800psi, I here a pop and the air starts leaking. It was a short outing with the prod. Who wants to tell me where to look first?
-
O-rings damaged most likely upon assembly.
Valve / gauge block or fill fitting ???
Going to have to partially disassemble gun ( trigger grip off, receiver & barrel off )
get some soapy water and a small brush, wet up behind around valve, gauge & fill .... Apply some air and look for bubbles !
Or ... just take it all the way down, DEBURR air tube well, new o-rings all around.
-
Had a crosman 1720t do the same thing. Sent it back to PA. Didn't want to void the warranty (never know what will happen down the road).
-
Find the leak if you want to fix it, other wise send it back and let someone else fix it.
Leak points:
1. If it leaks out of the muzzle (with the bolt closed) it’s the valve stem seal.
2. If it leaks out of the very tip of the fill nipple, it’s the fill nipple seal.
3. If it leaks from the threads of the fill nipple, it’s the threads.
4. If it leaks out of the seam around the end cap and the tube, it’s the o-rings on the end cap.
5. If it leaks around the gauge, then there are three harder to decide leak spots.
a. Could leak out of the gauge itself is the gauge is blown.
b. Could leak from the threads of the gauge if it is not sealed
c. Could leak from the HOLE in the TUBE if the o-rings on the internal “gauge block” has a nicked o-ring.
6. If none of those shows any leaking, then it pretty much has to be the 0-ring around the valve body (which would leak back into the striker area, but you would not be able to do an external test for it. Would use the elemination method (if it ain’t #1 through #5, then its gotta be #6).
Soapy water dribbled on the individual areas can help hunt down the leak.
Charge the gun and listen. One that leaks fast enough is easy to spot.
MOST OF THE TIME, it is one of the o-rings on the valve block (#5 c) that lets go.
HARD CORE (and this freaks some folks out because its water):
Put in about 3” of HOT water in the bath tub. Take off the gun’s grips and forend. DUNK the gun and look for bubbles. Have to look close to figure out the 3 parts to #5.
(Hot water trnds to evaporate faster than it can cause rust, which is why I recommend hot water. Even so, when the gun come out of the water, shake the &^^& out of it (or blow it off with compressed air), spray it down with water displacing oil, cand give it a rub down with an old towel.
BAD NEWS is that some gauges will not so good in a bit of moisture and will show “fog” when the temperature changes. My cure it to let it lie in the sun for a few hours to let it bake out the moisture.
SOFT CORE:
If water freaks you out, then go to K-Mart and buy a bottle of paint ball gun lube (which is basially pneumatic tool oil...can get a pinte of it at Harbor Freight for $3). Use that thin oil to dribble at the seams/likely places for a leak. Won't cause rust, and as the gun is outgassing (NOT sucking in), won't harm a thing.
-
Turns out it's leaking around the air gauge threads. What's the proper o-ring to fix it?. Thanks guys for the input.
-
I noticed a small pinhole on the back of the gauge. I installed it again using some teflon tape and it leaked. Wondering if the gauge is the culprit.
-
If it is still under warranty send it back to Crosman. My Prod leaked air the day I received it. Contacted Crosman who had me send the gun back on their dime and they then sent me a whole new Prod. Took maybe two weeks from the time I first called them to when I had the new gun in my hands. This one doesn't leak at all. Crosman should give lessons to other companies on how to run their customer service departments.
-
I noticed a small pinhole on the back of the gauge. I installed it again using some teflon tape and it leaked. Wondering if the gauge is the culprit.
i think the pin hole you see is how the gauge gets pressure in it to move the needle
hmmm! how many times did you wrap the threads with the tape?
Lloyd s-s uses some orange stuff to help seal threads i myself am thinking of getting some of that stuff instead of of using blue loc-tite
might want to call crosman for a warranty fix before you get into it too much
-
I re-rapped the threads on the gauge with teflon, put some blue Loc-tite on the threads and re-installed it. Next day I mixed up some water with dish detergent and added some around the gauge to check for leaks. Once I started filling with air,I heard the leak again. After listening closely, it sounded as if it were coming from up top around the breech. I then decided to take the gun apart and check some of the o-rings. The tp rings looked ok. Then I removed the valve, the o-ring on that looked ok too. I'll re-assemble it and check again. Can I use moly grease to insert the valve back in the chamber?
-
I re-rapped the threads on the gauge with teflon, put some blue Loc-tite on the threads and re-installed it. Next day I mixed up some water with dish detergent and added some around the gauge to check for leaks. Once I started filling with air,I heard the leak again. After listening closely, it sounded as if it were coming from up top around the breech. I then decided to take the gun apart and check some of the o-rings. The tp rings looked ok. Then I removed the valve, the o-ring on that looked ok too. I'll re-assemble it and check again. Can I use moly grease to insert the valve back in the chamber?
Best is Silicone grease for AG use. ( Electrical Dielectric grease for instance ) .... Petroleum based oils/grease are flammable and may cause issues in HP AG application, thus why Silicone is preferred and recommended.
-
Could this be a good kit to replace the o-rings?
http://www.amazon.com/dp/B005LRSAT0?tag=blogyh102012-20 (http://www.amazon.com/dp/B005LRSAT0?tag=blogyh102012-20)
-
Your paying $14 for a kit that 75% of the O Rings you will not need.
Order the correct O rings from http://www.theoringstore.com/ (http://www.theoringstore.com/)
Norm
-
looks like a good place to get Orings. crosman Orings run about the same price and if you order from them you can get the ones you need with out trying to figure what sizes you really need \\\ and they charge 4 bucks to ship if you order from their CS .
buying from them and maybe paying just a little more is good for you and them , it helps keep the cost of shipping down for other larger parts , which will still only cost you 4 bucks. JMHO
-
Your paying $14 for a kit that 75% of the O Rings you will not need.
Order the correct O rings from http://www.theoringstore.com/ (http://www.theoringstore.com/)
Norm
It also may not have some of the ones you need.