Have a new (30 shots) Mrod F&T that leaked down from 3,000 to 2,500 PSI over 2 days. So far 3 hours into balloon test looks like the gage is the source. Do I need to depressurize before I tighten it?
OFG
OFG
Newbe dumb question
- Thread starter Oldfatguy
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It's a good idea whenever dealing with HPA to depressurize before attempting to solve a leak.
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No. Just tighten it slightly more, fill up and see if it leaks. Don't overtighten it. If it still leaks, you may need to depressurize & remove the gauge and check the o-ring. I'm not sure if that particular gun has an o-ring under the gauge.
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Thanks for all the replies. Six hours into balloon test on barrel, fill port, & gage and not showing any leaks there so far. Will wait it out overnight. The Syn Mrod I returned leaked from 3,000 to 2,000 PSI overnight. Balloon tests and soapy water never did find that leak. So where else could it be leaking?
OFG
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If you're sure it's the gauge I wouldnt worry about degassing b4 tightening but DON'T overtighten! THAT could pinch an o-ring. Keep a spray bottle with soapy solution nearby to check. I don't have to tell you to remove the stock to work on it, do I?
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Found it ! Learned a few things: I don’t know how to do a good balloon test, nasal spray bottle is good for soapy water, and leak is at gauge adapter/tank joint. So now do I depressurize before tightening joint or not?
Not. Benjamin tech support wants me to take out gauge & put 2 - 3 wraps of Teflon tape on the threads. If that doesn’t fix the leak they will send a new gauge. Thankfully I have the depressurizing tool. Impressed with Benjamin customer service.
OFG
edit to add tech support
Not. Benjamin tech support wants me to take out gauge & put 2 - 3 wraps of Teflon tape on the threads. If that doesn’t fix the leak they will send a new gauge. Thankfully I have the depressurizing tool. Impressed with Benjamin customer service.
OFG
edit to add tech support
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They don't have an o-ring under the gauge? Interesting. Be sure NOT to get any tape in the little tiny hole on the bottom.
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Yes there is an o-ring under the gauge, part #2-009 in the breakdown. The one in my rifle has taken a set so not doing it’s job.
OFG
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DO NOT USE !!!! Soapy water around the gauge !!!!
The water will enter around the fitting & hole threw tube and get INSIDE the air tube at that area and RUST TUBE !!!
You can do this with soapy water ONLY WHEN you plan to tear rifle apart irregardless & dry off where wet.
WD-40 the more prudent choice as it will show bubbles too, tho not soapy bubbles
The water will enter around the fitting & hole threw tube and get INSIDE the air tube at that area and RUST TUBE !!!
You can do this with soapy water ONLY WHEN you plan to tear rifle apart irregardless & dry off where wet.
WD-40 the more prudent choice as it will show bubbles too, tho not soapy bubbles
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Thanks for the heads up. Tried WD40 and it does bubble nicely with tiny bubbles, not the big soap bubbles. I have learned something today - thanks.
OFG
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Check the size and...amazon is sometimes your friend for o-rings or the local hardware store...sometimes.
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Only with a LOT of soap, a fast air leak and a very good friendSo, putting the gun in a bath tub isn't a good idea? Asking for a friend.
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